JP4618019B2 - Image recording / playback device - Google Patents

Description

  The present invention relates to an image recording / reproducing apparatus.

  As background art of this technical field, for example, there is JP-A-8-205133 (Patent Document 1). In this publication, an object is to “provide a surveillance camera control device capable of sufficiently recording video of a surveillance camera that accurately captures an intruder”, and as a configuration “a plurality of videos”. A digital video signal obtained by A / D converting the signal from the camera 50 is stored in each image storage unit 3 and subjected to multi-screen processing, D / A conversion, and signals from the plurality of video cameras and the D / A converted signals. In the surveillance camera control device that switches the A-converted signal by the switch unit 6 and outputs it from the output unit 7, a luminance abnormality change determination unit 8 that determines abnormal changes of a plurality of luminance signals read from the image storage unit, and a timer 10 And a recording mode setting unit 11 for setting a recording mode for the VTR based on the determination result of the abnormal change in luminance, and the brightness of a predetermined position on the screen shot by each video camera is provided. Was monitored at predetermined time intervals, the change of the luminance is determined to be abnormal, and. "Is described as the controls to change the recording mode of the VTR.

  Another background art is, for example, Japanese Patent Application Laid-Open No. 2004-253910 (Patent Document 2). In this publication, as a problem, “to provide a video distribution system capable of obtaining frames as motion detection targets from a plurality of analog video signals input from a plurality of cameras at a frame interval optimum for motion detection processing” is provided. The video signal decoder 112 is an analog video signal that is input to a plurality of input channels 1 to 4 and is converted into video data for a video signal that is input to a target input channel to be processed. The CPU 101 performs motion detection processing by comparing the video data converted by the video signal decoder 112 with past video data that is past video data, and the CPU 101 performs motion detection processing. Target from multiple input channels so that the time interval between past video data and video data to be compared is equal to or greater than the predetermined time interval Controls the selector 1121 to select the power channel. Has been described as ".

JP-A-8-205133 JP 2004-253910 A

  2. Description of the Related Art In recent years, a surveillance system that records a surveillance region by connecting a plurality of surveillance camera devices to an image recording / reproducing device as crime increases has been attracting attention. Recorded images are important because they are used to identify criminals.

  By the way, the image recording / reproducing apparatus uses a hard disk as a recording medium, and records an image only when there is a movement in the monitoring area so that recording can be performed for a long time by effectively using a limited recording capacity. Things have appeared. That is, motion detection is performed by comparing the current image in the monitoring area with the past image, and recording is performed for a long time by recording only when the image changes. In addition, the recording interval for each camera device can be set according to the importance of the camera device to be connected, and a device has been devised to record the image of the camera device at an important place in detail.

  By the way, it is desired to be able to detect even when the monitoring object moves suddenly. For this purpose, it is necessary to shorten the detection interval, which is the interval at which the monitoring image is taken into the motion detection means. However, in the conventional technique described in Patent Document 1, the detection interval for motion detection is fixed, and consideration is not given to changing the detection interval. There was a problem that there was.

  In a monitoring system in which a plurality of camera devices are connected, it is desired to detect motion in all the connected camera devices and to record an image from the camera device that has moved. Even in the image recording / reproducing apparatus of such a monitoring system, it is necessary to be able to vary the detection interval for each camera apparatus in order to cope with a sudden movement. In particular, an image of a camera device that monitors an entrance or the like needs to be captured at a short interval. However, in the prior art described in Patent Document 2, the detection interval of one camera device set in advance can be changed, but there is a problem that consideration is not given to changing the detection interval for every camera device.

  An object of the present invention is to provide an image recording / reproducing apparatus capable of changing an image detection interval for motion detection for each camera apparatus.

  The above object can be achieved by the invention described in the claims.

  According to the present invention, the image detection interval for motion detection can be varied for each camera device.

  Hereinafter, an embodiment of an image recording / reproducing apparatus used in a monitoring system according to the present invention will be described with reference to FIGS.

  A first embodiment of an image recording / reproducing apparatus used in a monitoring system according to the present invention will be described with reference to FIGS.

  First, the configuration and operation outline of the monitoring system and the image recording / reproducing apparatus according to the present invention will be described with reference to FIG. FIG. 1 shows a block diagram of a monitoring system and an image recording / reproducing apparatus according to the present invention. In this embodiment, description will be made on the case where 16 camera apparatuses can be connected to the image recording / reproducing apparatus and 3 cameras are actually connected.

  The monitoring system according to the present invention includes an image recording / reproducing apparatus 1 according to the present invention, an external camera device 2 (16 units) installed in the monitoring area, and a monitor 3 for displaying an image from the image recording / reproducing apparatus 1. Has been. Here, for the input unit 111 for inputting an image signal from the camera device 2, the input channel from the camera 1 is ch1, the camera 2 is ch2,... The camera 16 is ch16.

  The image recording / reproducing apparatus 1 according to the present invention selects a predetermined image from a demodulator 112 (1 to 4) that converts an image signal from the camera device 2 into a digital signal and images from ch1 to ch16 from the demodulator. An image processing control unit 113 that performs processing and control for sending to the recording system and the motion detection system, a connection detection unit 114 that detects the connection state of ch1 to ch16, a memory 115 that temporarily holds an image of the recording system, and a memory 115 Image processing unit 116 for performing various processes such as pixel size of image data from image data, compression encoding processing unit 117 for compressing and encoding image data by the MPEG2 method, and motion information addition for adding motion information to the compressed image data 118, a motion detection image processing unit 119 that divides a motion detection image into areas, and motion information that generates motion information by performing motion detection compared to past images. A motion information holding unit 121 that holds past images, temporarily holds the motion information generated by the motion information processing unit 120, and sends the motion information to the motion information adding unit 118 in synchronization with the image information; A media interface 122 that processes the compressed image data and motion information from the motion information adding unit 118 so as to conform to the recording method of the HDD 123 (hard disk) as a recording medium, a motion detection that controls the timing for capturing an image for motion detection The interval control unit 124, the operation unit 125 that accepts an operation from the user, the control signal corresponding to the input from the operation unit 125 and the control signal for various control of the present apparatus, and the time measuring function and the operation state of the present apparatus are recognized. A motion information detection processing unit 127 that detects motion information recorded in the control unit 126 and the HDD 123; A decoding / decompression processing unit 128 that decodes / decompresses the compressed image data recorded in the DD 123, converts the decoded / decompressed image data into an analog image signal, and performs various processes such as character information superposition and menu screen insertion. And an image processing unit 129.

  At the time of recording, an image from the camera device 2 is input to the image processing control unit 113 via the input unit 111 and the demodulator 112, and is recorded by the recording image control unit 130 so that a recording interval for each input channel is set in advance. The selected image data is converted into compressed image data by the image processing unit 116 and the compression encoding processing unit 117 via the memory 115 and sent to the motion information adding unit 118. On the other hand, in the image processing control unit 113, the motion detection image control unit 131 controls the ch1 to ch1 at a predetermined interval for each input channel by the control of the motion detection interval control unit 124 calculated based on preset setting conditions. An image is taken out from ch16 and sent to the image processor 119 for motion detection. The motion detection image processing unit 119 divides the image into areas, and the motion information processing unit 120 compares the past image stored in the motion information storage unit 121 for each area to generate motion information. And sent to the motion information holding unit 121. The motion information holding unit 121 temporarily holds the motion information, sends the motion information to the motion information adding unit 118 in synchronization with the timing of the image data, and updates the stored past image information to an image. The compressed image data and the motion information from the motion information adding unit 118 are converted into the HDD system by the media interface 122. When the motion information processing unit 120 detects a motion, the control unit 126 controls the HDD 123 to record the compressed image data in the data area and the motion information in the management area.

  During reproduction, the compressed image data recorded in the data area of the HDD 123 is decoded / expanded by the decoding / decompression processing unit 128 via the media interface 122 and the motion information detection processing unit 127, and an analog image is output by the image processing unit 129. It is converted into a signal and character information is superimposed and displayed on the monitor 3. On the other hand, the motion information recorded in the management area of the HDD 123 is detected by the motion information detection processing unit 126, and is used for the search head of the scene where the motion is detected.

  In the present embodiment, the image processing control unit 113 includes a recording image control unit 130 for selecting image processing for the recording system and a motion detection image control unit 131 for selecting image processing for the motion detection system, which are independent of each other. Images can be selected, and 1 to 16 selected images can be selected. As a result, even when the recording interval for each camera is set according to the importance of the camera to be connected and the image of the camera device at an important place is recorded finely, the image capture timing for motion detection can be freely set, The detection interval suitable for the input channel can be set.

  Next, the flow of processing for assigning detection channels for changing the detection interval of motion detection for each input channel in the image recording / reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 2 is a flowchart when detection channel distribution is set according to the present invention, and FIG. 3 is a screen display when detection channel distribution is set according to the present invention. It should be noted that the following setting is performed while viewing the menu screen by an operation from the operation unit 125. The operation unit 125 includes a cursor button, a determination button, a numeric button, and the like.

  When the motion detection interval setting is selected from the menu by the operation of the operation unit 125, the motion detection interval setting process is entered, and a motion detection interval setting screen 311 shown in FIG. 3A is displayed in step S211. Here, as a default, all 16 channels are set to “valid” and weight “5”. In step S212, the connection detection unit 114 enters a process of detecting an input channel to which a camera device to be recorded and motion-detected is connected. After repeating until step S213 confirms 16 channels, the process proceeds to step S214. A motion detection interval setting screen 312 shown in FIG. 3B is displayed. In this embodiment, since there are actually three camera devices 2 to be connected, ch1 to ch3 are valid and ch4 to ch16 are invalid. In step S214, according to the display of the motion detection interval setting screen 313 shown in FIG. 3C, whether or not ch1 is to be subject to motion detection (valid / invalid column 314) is selected. Here, as “valid”, it is determined whether or not all channels (ch1 to ch3) as targets are set in step S215. If all channels are not set, the process returns to step S214, and if all channels are set, step S216 is set. Proceed to In step S216, the ch1 weight column 316 is set according to the display of the motion detection interval setting screen 315 shown in FIG. Here, as the weight “5”, it is determined whether all channels (ch1 to ch3) to be processed are set in step S217, and if all channels are not set, the process returns to step S216, and if all channels are set, step is set. The process proceeds to S218. When all items are set in step S217, a motion detection interval setting screen 317 shown in FIG. 3E is displayed. In step S218, it is determined whether an operation for ending the setting has been performed. If there is an end operation repeatedly, the detection interval setting process is ended in step S219, the motion detection interval setting screen is erased, and the process ends.

  In this embodiment, the setting of valid / invalid can be performed in steps S214 and 215 so that it can cope with the case where the camera device is connected but the motion detection is not necessary, but this step is deleted. It doesn't matter.

  The processing flow, detection interval calculation, and image capture timing (motion detection timing) when the detection interval is changed by distribution during monitoring when set by the above operation will be described with reference to FIGS. FIG. 4 is a flowchart of the sorting process during monitoring according to the present invention, FIG. 5 is a motion detection timing when the number of connected channels is increased or decreased according to the present invention, FIG. 6 is a motion detection timing when there is a recording channel according to the present invention, and FIG. The motion detection timing when the “weight” of motion detection according to the present invention is set differently for each channel is shown. In the present embodiment, the description will be made assuming that the minimum interval for motion detection is 1/30 seconds, that is, the total number of frames for image capture is 30 frames / second.

  First, the flow of processing will be described with reference to FIG. When the monitoring mode is entered by operating the operation unit 125, the detection interval calculation process is entered in step S411, and the control unit 126 determines whether or not there is an input channel that has changed to a recording state among the input channels to be motion-detected. . If there is an input channel that has changed to the recording state, the connection detection unit 114 detects the further connected input channel in step S412. The process is repeated until all 16 channels are confirmed in step S413. When 16 channels are confirmed, the process proceeds to step S414. In step S414, image capture for motion detection is paused for an input channel that is not connected or disabled with respect to an input channel that is in a recording state, is connected and set to valid, and detection that is in a recording stopped state is valid. Processing for assigning image capture timing (detection timing) to input channels. Further, the number of images to be captured per second and the detection interval are calculated according to the set “weight”. When the detection interval is calculated in step S414, the completion of the detection interval calculation process is determined in step S415. If completed, the detection interval calculation process is terminated. Thereafter, in step S416, the detection interval is calculated for each input channel. The motion detection operation starts at the detection interval. Thereafter, the process returns to step S411, and when there is a change in the target channel, the detection interval calculation process is repeated. This process is repeated until an end instruction is received from the control unit 126.

Here, details of the detection interval calculation method will be described. The number of images captured per second is the number of images captured per second = total number of frames / sum of weights × weight of target channel Equation 1
It becomes.

If the "weight" is the same for each input channel,
Number of images to be captured per second = total number of frames / number of effective detection channels (2)
It becomes.

Here, since the interval of one frame is 1/30 second, the detection interval is: detection interval = total number of frames / number of images captured in 1 second × 1/30 Expression 3
It becomes.

  A detection interval when the number of input channels to be connected is increased or decreased in the monitoring state will be described with reference to FIG. Here, the “weight” is assumed to be the same for each input channel.

Initially, when ch1 and ch2 are connected and in a recording stop state, the number of images to be captured per second of ch1 and ch2, that is, the detection interval, is the number of images captured per second from Equation 2 and Equation 3 = 30 frames / 2ch = 15 frames Detection interval = 30/15 × 1/30 = 1/15 seconds. As shown in FIG. 5A, ch1 and ch2 are detection timings for capturing an image every 1/15 seconds. Here, when the connection of ch1 is released, the image capture of ch1 is paused, and the image capture timing (detection timing) is assigned to ch2. For this reason, since all are allocated to ch2, as shown in FIG. 5 (b), it becomes a detection timing for capturing an image every 1/30 seconds. Further, when ch1 and ch3 are additionally connected, the number of images captured per second from Equation 2 and Equation 3 = 30 frames / 3ch = 10 frames Detection interval = 30/10 × 1/30 = 1/10 seconds. As shown in c), ch1 and ch2 are detection timings for capturing an image every 1/10 second.

  A specific detection interval when ch1 is in the recording state in the monitoring state will be described with reference to FIG. Here, the “weight” is assumed to be the same for each input channel.

  When ch1 and ch2 shown in FIG. 6A are connected and in a recording stop state, as described in FIG. 5A, ch1 and ch2 become detection timings for capturing an image every 1/15 seconds. Yes. Here, when ch1 is set to the recording state, the image capture of ch1 is paused, and the image capture timing (detection timing) is assigned to ch2. For this reason, since all are assigned to ch2, the detection timing for capturing an image every 1/30 seconds is obtained as shown in FIG. 6B.

  Next, the detection interval when the “weight” is set differently for each channel will be described with reference to FIG. Here, as shown in FIG. 3E, the set value of “weight” of each channel is “5” for ch1, “3” for ch2, and “2” for ch3.

Since the weights of channels 1, 2, and 3 are “5”, “3”, and “2”, respectively, the number of images to be captured in 1 second of ch1 = 30 / (5 + 3 + 2) × 5 = 15 frames from Equation 1 1 second of ch2 The number of images captured in 30 = (5 + 3 + 2) × 3 = 9 frames The number of images captured in 1 second of ch3 = 30 / (5 + 3 + 2) × 2 = 6 frames, and the detection interval from Equation 3 is the detection interval of ch1 = 30 / 15 × 1/30 = 1/15 sec. Ch2 detection interval = 30/9 × 1/30 = 1/9 sec. Ch3 detection interval = 30/6 × 1/30 = 1/6 sec. The detection timing is as shown in FIG.

Here, if there is a movement in ch1, the movement is detected at time t1, and alarm recording of ch1 is started. Since ch1 is in the alarm recording state from time t1 to time t3, the image capturing for detection is suspended, and the image capturing timing (detection timing) is distributed to ch2 and ch3. Until the time t1 and after the time t3, the detection interval is the same as in the case of FIG.
The detection intervals of ch2 and ch3 between times t1 and t3 are as follows: From the formulas 1 and 3, the number of images captured in 1 second of ch2 = 30 / (3 + 2) × 3 = 18 frames The number of images captured in 1 second of ch3 = 30 / (3 + 2) × 2 = 12 frames ch2 detection interval = 30/18 × 1/30 = 1/18 sec ch3 detection interval = 30/12 × 1/30 = 1/12 sec, FIG. 7B The detection timing is as shown in FIG.

Further, a case where the alarm recording state is set from ch1 to time t3 and ch2 from time t2 to t4 will be described with reference to FIG. Until time t1 and after time t4, the detection interval is the same as in FIG. 7A, and from time t1 to t2 is the same detection interval as from time t1 to t3 in FIG. 7B. From time t2 to t3, since ch1 and ch2 are in the alarm recording state, image capturing for detection is suspended, and image capturing timing (detection timing) is distributed to ch3. For this reason, since all detection timings are assigned to ch3, detection timing for capturing an image every 1/30 seconds is obtained. From time t3 to t4, since ch2 is in an alarm recording state, image capture for detection is suspended, and image capture timing (detection timing) is distributed to ch1 and ch3. The detection interval at this time is the number of images captured in 1 second of ch1 = 30 / (5 + 2) × 5 = 150/7 = about 21 frames from Equation 1 and Equation 3 Number of images captured in 1 second of ch3 = 30 / (5 + 2 ) × 2 = 60/7 = about 9 frames ch2 detection interval = 30/21 × 1/30 = 1/21 sec ch3 detection interval = 30/9 × 1/30 = 1/9 sec.

  As described above, input channels that are not connected or that are in a recording state pause image capture for motion detection, and stop recording by allocating image capture timing (detection timing) to other input channels. The detection interval of the camera device in the state is shortened, and it is possible to cope with a sudden movement, and the motion detection performance is improved.

  A second embodiment of the image recording / reproducing apparatus used in the monitoring system according to the present invention will be described with reference to FIGS. Here, since the configurations and operation outlines of the monitoring system and the image recording / reproducing apparatus are the same as those in FIG. 1 of the first embodiment, description thereof is omitted here. The difference from the first embodiment is that the detection interval of motion detection can be varied for each input channel according to the time zone.

  A setting process flow for changing the detection interval of motion detection for each time zone in the image recording / reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 8 is a flowchart when the motion detection interval is set for each time zone according to the present invention, and FIG. 9 is a screen display when the motion detection interval is set for each time according to the present invention. It should be noted that the following setting is performed while viewing the menu screen by an operation from the operation unit 125. The operation unit 125 includes a cursor button, a determination button, a numeric button, and the like. In this embodiment, three camera devices 2 are actually connected.

  When the motion detection interval setting is selected for each time slot from the menu by the operation of the operation unit 125, the motion detection interval setting process is entered for each time slot in step S811, and the connection detection unit 114 performs recording and motion detection target in step S812. The process enters the process of detecting the input channel to which the camera device to be connected is connected, and is repeated until 16 channels are confirmed in step S813, and then the process proceeds to step S814. At this time, a detection interval setting screen 911 is displayed for each time period shown in FIG. Here, No. is used as the default. “1”, start time “00:00”, end time “00:00”, and weight “5”. Further, since 8 channels are displayed on one screen, it is possible to call the next page icon 913 by the operation unit 125 when it is desired to see ch9 and subsequent channels.

  In step S814, whether or not to make a motion detection target (valid / invalid column 915) is selected according to the display of the detection interval setting screen 911 for each time period shown in FIG. Here, it is determined whether or not all channels (ch1 to ch3) as targets are set as “valid” in step S815. If all channels are not set, the process returns to step S814, and if all channels are set, the process returns to step S816. move on. When the ch1 column 914 is selected in step S816 and the detailed setting icon 912 is selected and executed in step S817, a detection interval setting screen 916 is displayed for each ch1 time slot shown in FIG. 9B. In accordance with the display on the detection interval setting screen 916 for each ch1 time zone, No. In the column 917, “1” is input, in step S819, the start time and end time column 918 is input with the start time “23:00” and the end time “08: 0”, and in step S820, “5” is input into the weight column 919. In step S821, it is determined whether the setting of the target channel is completed. If the setting is continued, the process returns to step S817, and the setting of ch1 is repeated. When the setting of ch1 is completed, a detection interval setting screen 920 is displayed for each ch1 time slot shown in FIG. When the next channel icon 921 is selected and executed in step S822, the process returns to step S816, ch2 is set, and the detection interval setting screen 922 and ch3 are set for each ch2 time slot shown in FIG. A detection interval setting screen 923 is displayed for each indicated ch3 time zone. When the end icon 924 is selected and executed on the detection interval setting screen 923 for each ch3 time zone, the detection interval setting screen 925 is displayed for each time zone in step S823, and when the end icon 925 is further selected and executed, the end of setting is determined in step S824. If completed, the motion detection interval setting process ends for each time slot in step S825, and the detection interval setting screen 924 is erased and the process ends. In FIG. 9 (f), only ch1 to ch2 are displayed, but by selecting and executing the next page icon 926, the setting contents after ch3 can be viewed. Thereafter, the motion detection operation starts at the detection interval for each input channel at the detection interval calculated based on the set conditions.

  The processing flow and the detection interval calculation when the detection interval is changed for each time zone during monitoring when set by the above operation will be described with reference to FIGS. FIG. 10 is a flowchart of variable detection intervals for each time zone during monitoring according to the present invention, and FIG. 11 shows a list of detection intervals for each time zone according to the present invention. In the present embodiment, the description will be made assuming that the minimum interval for motion detection is 1/30 seconds, that is, the total number of frames for image capture is 30 frames / second.

  First, the flow of processing will be described with reference to FIG. When the monitoring mode is entered by operating the operation unit 125, the detection interval calculation process is entered in step S1011 and the current time is confirmed by the control unit 126. In step S1012, it is determined whether a channel for changing the detection interval is set at the current time. If there is no set channel, the process ends. If there is a set channel, the process proceeds to step S1013. In step S1013, the number of images to be captured per second and the detection interval are calculated according to the weight set for each effective channel at the current time. When the detection interval is calculated in step S1013, the completion of the detection interval calculation is determined in step S1014, and if completed, the detection interval calculation processing is terminated. Thereafter, in step S1015, the detection interval is calculated for each input channel. The motion detection operation starts at the detection interval. Thereafter, the process returns to step S1011. If there is a channel whose detection interval is changed at the current time, the detection interval calculation process is repeated. This process is repeated until an end instruction is issued from the operation unit 125.

  Next, a specific detection interval for each time zone according to the above setting will be described with reference to FIG. Here, the detection interval is indicated by the number of images (frames / second) captured per second.

If the current time is 23:00, No. of ch1, ch2, and ch3. 1 and the weight for each channel in the time zone is “5” for ch1, “3” for ch2, and “2” for ch3, so the number of images captured per second is represented by ch1 Number of images to be captured per second = 30 / (5 + 3 + 2) × 5 = 15 frames Number of images captured per second for ch2 = 30 / (5 + 3 + 2) × 3 = 9 frames Number of images captured per second for ch3 = 30 / (5 + 3 + 2) ) × 2 = 6 frames. Thereafter, monitoring is continued at the calculated detection interval. When the current time reaches 08:00, there is a channel for changing the detection interval, so that the detection interval is restarted. No. of ch1, ch2, ch3 2 and the weight of each channel in the time zone is “5” for ch1, “5” for ch2, and “5” for ch3. The number of images to be captured per second = 30 / (5 + 5 + 5) × 5 = 10 frames The number of images captured per second for ch2 = 30 / (5 + 5 + 5) × 5 = 10 frames The number of images captured per second for ch3 = 30 / (5 + 5 + 5) ) × 5 = 10 frames. Thereafter, monitoring is continued at the calculated detection interval, and the detection interval is calculated again at the time of 10:00 and 21:00.

  In this way, since the detection interval can be changed for each input channel and time zone, in the monitoring at a convenience store or the like, the detection interval near the cash register is shortened in the daytime, and the detection interval in the store is shortened at night. Since the detection interval can be freely changed depending on the monitoring area and time zone, the performance of motion detection is improved.

  A third embodiment of the image recording / reproducing apparatus used in the monitoring system according to the present invention will be described with reference to FIGS. The difference from the first embodiment is that, in the first embodiment, the motion detection interval can be changed according to the state of the connected input channel, but in this third embodiment, the luminance level can be set to make the motion detection interval variable. It is that. That is, when the luminance level becomes higher than a predetermined threshold, the motion detection interval for detecting motion can be varied. Therefore, in FIG. 1 of the monitoring embodiment 1, the image processing unit 119 for motion detection divides the image into areas, reads the luminance level for each image area, and compares it with a preset threshold value so that the luminance level is higher than the threshold value. When it becomes, the motion detection interval can be made variable. A setting process flow for changing the area-corresponding motion detection interval in the image recording / reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 12 is a flowchart when setting an area corresponding motion detection interval according to the present invention, and FIG. 13 is a screen display when setting an area corresponding motion detection interval according to the present invention. It should be noted that the following setting is performed while viewing the menu screen by an operation from the operation unit 125. The operation unit 125 includes a cursor button, a determination button, a numeric button, and the like.

  When the area-corresponding motion detection interval setting is selected from the menu by operating the operation unit 125, in step S1211, the input channels connected in steps S1212 and 1213 are detected, and in steps S1214 and 1215, the validity of each input channel is determined. In step S1216 and 1217, the weight of the detection interval in the normal monitoring mode of each input channel is set. Here, since ch1 to ch3 are set as in the first embodiment, the area corresponding motion detection interval setting screen shown in FIG. 13A is displayed. Since this process is the same as steps S212 to S217 in FIG. 2, detailed description thereof is omitted here.

  In step S1217, all target channels are set, ch1 is selected, and when luminance level setting for each area is selected, the process proceeds to step S1218, and the luminance level setting screen 1311 for each area shown in FIG. 13B is displayed. . While viewing the luminance level setting screen 1311 in step S1219, the area A1314 is designated and the luminance level “5” serving as a threshold is input. Furthermore, the area B1315 is designated and a luminance level “4” serving as a threshold is input. Here, the area A with the window 1312 is “5”, and the area B with the door 1313 is “4”. Here, the area is specified by a method of specifying start points 1316 and 1318 and end points 1317 and 1319 using the cursor buttons of the operation unit 125.

  In step S1220, it is determined whether the setting for each input channel has been completed. If not, the process returns to step S1219 to set ch2 and ch3. When the setting is completed in step S1221, an area-corresponding motion detection interval setting screen is displayed. In step S1221, it is determined whether an operation for ending the setting has been performed. If there is no ending operation, the process returns to step S1211, and the setting is repeated. In step S1222, the area-corresponding motion detection interval setting process ends, the area-corresponding motion detection interval setting screen disappears, and the process ends.

  The flow of processing and the calculation of the detection interval when the area-related motion detection interval during monitoring when set by the above operation will be described with reference to FIGS. 14 and 15. FIG. 14 is a flowchart when the area corresponding motion detection interval is changed according to the present invention, and FIG. 15 is a monitor image display according to the present invention.

  When the monitoring mode is entered by operating the operation unit 125, the motion detection operation is started at the detection interval assigned by the weight of each input channel in the normal monitoring mode described in the first embodiment in step S1411, and each input channel and Check the brightness level for each area. In step S1413, it is determined whether there is an area larger than the preset brightness level. If there is no area, the process returns to step S1411. If there is an area with a higher brightness level, the process proceeds to step S1414. In step S1414, the detection interval is calculated by setting the weight of the input channel in the area with a large luminance level to “5” and the weights of the other channels to “1”. When the detection interval is calculated in step S1414, the completion of the detection interval calculation process is determined in step S1415. If completed, the detection interval calculation process is terminated. In step S1416, detection for each input channel is performed at the calculated detection interval. The motion detection operation starts at intervals. Then, after a predetermined time has elapsed, the process returns to step S1411 and is repeated. This process is repeated until an end instruction is issued from the operation unit 125.

Here, as shown in FIG. 15A, when the luminance level 4 is set to the door 1513 in the area B1515 of the monitoring image 1511 of ch1, the door 1518 is opened and removed as shown in FIG. Assuming that light enters and the luminance level rises slowly and exceeds level “4”, the number of images captured per second of each input channel is the number of images captured per second of ch1 = 30 / (5 + 1 + 1) × 5 = 150/7 frames Number of images captured per second of ch2 = 30 / (5 + 1 + 1) × 1 = 30/7 frames Number of images captured per second of ch3 = 30 / (5 + 1 + 1) × 1 = 30/7 frames, ch1 Is 22 frames / second, and ch2 and ch3 are 4 frames / second.

  In this way, the detection interval of the input channel whose luminance level is increased can be shortened, so that it becomes brighter when the door is opened before a person enters from the door in monitoring at a convenience store or the like. When a person comes in after detecting this, the detection interval is shortened, so it is possible to cope with a sudden movement and the motion detection performance is improved.

  A fourth embodiment of the image recording / reproducing apparatus used in the monitoring system according to the present invention will be described with reference to FIGS. Here, since the configurations and operation outlines of the monitoring system and the image recording / reproducing apparatus are the same as those in FIG. 1 of the first embodiment, description thereof is omitted here. The difference from the first embodiment is that the detection interval of motion detection is manually set for each input channel.

  The flow of manual detection interval change setting processing in the image recording / reproducing apparatus of the present invention will be described with reference to FIGS. FIG. 16 is a flowchart at the time of manual detection interval change setting according to the present invention, and FIG. 17 shows a screen display at the time of manual detection interval change setting according to the present invention. In the present embodiment, a case where ch1 to ch3 are connected and a detection interval is set for each input channel will be described. It should be noted that the following setting is performed while viewing the menu screen by an operation from the operation unit 125. The operation unit 125 includes a cursor button, a determination button, a numeric button, and the like.

  When the motion detection interval setting is selected from the menu by operating the operation unit 125, the motion detection interval manual setting process is started, and the motion detection interval setting screen shown in FIG. 17 is displayed in step S1611. In step S1612, the detection interval of the target channel is input through the operation unit 125. In step S1613, it is determined whether all channels have been set. If all channels have not been set, the process returns to step S1612 to set all channels. Repeat until When all channels are set in step S1613, the motion detection interval manual setting process is terminated in step S1614 and the screen display is turned off. Thereafter, the motion detection operation starts at the detection interval for each input channel at the set detection interval. Here, ch1 is set to “1/15 seconds”, ch2 is set to “1/10 seconds”, and ch3 is set to “1/5 seconds” as detection intervals.

  When the monitoring mode is entered by operating the operation unit 125 after the above setting, the detection operation is performed according to the detection intervals of “1/15 second” for ch1, “1/10 second” for ch2, and “1/5 second” for ch1. to go into.

  Specific image capture timing (motion detection timing) when set by the above operation will be described with reference to FIG. FIG. 18 shows the motion detection timing according to the present invention.

  Since ch1 detects motion at a detection interval of every 1/15 seconds, the number of frames is 15 frames / second, ch2 detects motion at a detection interval of every 1/10 seconds, so the number of frames is 10 frames / second, ch3 is 1 / Since motion is detected at a detection interval of every 5 seconds, the motion detection timing is such that the number of frames is 5 frames / second.

  Here, in the case of a system in which the total number of frames for all channels is 30 frames / second, an alarm may be issued if the number of frames exceeds when the detection interval is input. Furthermore, the total number of frames of all channels may be other than 30 frames / second.

  As described above, since the detection interval can be set for each input channel in the fourth embodiment, the detection interval near the cash register can be shortened by monitoring a convenience store or the like, so that the performance of motion detection is improved and sudden movement due to burglary or the like is caused. Correspondingly, alarm can be issued and recording can be started.

  According to each embodiment of the present invention described above, an image detection interval for motion detection can be varied for each camera device.

1 is a block diagram of a monitoring system and an image recording / reproducing apparatus according to a first embodiment of the present invention. The flowchart at the time of the detection channel distribution setting by 1st Example of this invention Screen display when setting detection channel allocation according to the first embodiment of the present invention Flowchart of distribution processing during monitoring according to the first embodiment of the present invention Motion detection timing when the number of connected channels increases or decreases according to the first embodiment of the present invention Motion detection timing when there is a recording channel according to the first embodiment of the present invention Motion detection timing when the “weight” of motion detection according to the first embodiment of the present invention is set for each channel The flowchart at the time of a motion detection interval setting for every time slot | zone by 2nd Example of this invention. Screen display when setting motion detection interval for each time zone according to the second embodiment of the present invention Flowchart with variable detection interval for each time zone during monitoring according to the second embodiment of the present invention List of detection intervals for each time zone according to the second embodiment of the present invention The flowchart at the time of the area corresponding motion detection interval setting by 3rd Example of this invention Screen display when setting an area corresponding motion detection interval according to the third embodiment of the present invention The flowchart at the time of the area corresponding motion detection interval variable by 3rd Example of this invention Monitoring image display according to the third embodiment of the present invention The flowchart at the time of the manual detection interval change setting by 4th Example of this invention Screen display during manual detection interval change setting according to the fourth embodiment of the present invention Motion detection timing according to the fourth embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image recording / reproducing apparatus, 111 ... Input part, 112 ... Demodulator, 113 ... Image processing control part,
114: Connection detection unit, 115 ... Memory, 116 ... Image processing unit,
117: Compression encoding processing unit, 118: Motion information adding unit, 119: Image processing unit for motion detection,
120 ... motion information processing unit, 121 ... motion information holding unit,
122 ... Media interface, 123 ... HDD, 124 ... Motion detection interval control unit,
125 ... operation unit, 126 ... control unit, 127 ... motion information detection processing unit,
128: Decoding / decompression processing unit, 129: Image processing unit, 130: Recording image control unit,
131 ... Motion detection image control unit, 2 ... Camera device, 3 ... Monitor,
311, 312, 313, 315, 317 ... motion detection interval setting screen,
314, 915 ... Valid / Invalid column, 316, 919 ... Weight column,
911 ... Detection interval setting screen for each time zone, 912 ... Detailed setting icon,
913 ... Next page icon, 914 ... ch1 column,
916... Detection interval setting screen for each ch1 time zone, 917. Field,
918 ... start time and end time column, 1311 ... brightness level setting screen for each area,
1312: Window, 1313 ... Door, 1314 ... Area A, 1315 ... Area B,
1316, 1318 ... start point, 1317, 1319 ... end point,
1511: Monitoring image

Claims (2)

A plurality of input means to which an image signal is input from an external camera device, and a motion for detecting motion by comparing an image input from the input means with an image input from the input means before the image signal In an image recording / reproducing apparatus comprising a detecting means,
The detection interval for motion detection can be changed for each input means according to the state for each input means ,
A connection detection means for detecting connection with the external camera device, and an operation state detection means for detecting whether or not the device is in a recording state;
An image recording device characterized in that the input means in which the external camera device is not connected and in a recording state pauses motion detection, and the detection interval of the input means in which the external camera device is connected and is not in a recording state is shortened. Playback device. A plurality of input means to which an image signal is input from an external camera device, and a motion for detecting motion by comparing an image input from the input means with an image input from the input means before the image signal In an image recording / reproducing apparatus comprising a detecting means ,
The detection interval for motion detection can be changed for each input means,
The motion detection means divides an image into a plurality of areas, and when the brightness level in each of the divided areas exceeds a preset brightness level threshold of each area, the motion detection means of the image input An image recording / reproducing apparatus characterized by changing a detection interval.

Images