JP5139232B2 - TV camera equipment - Google Patents

Description

  The present invention relates to a television camera device, and more particularly to a television camera device that can easily adjust the mounting positions of a plurality of image sensors.

  As a conventional technique, in a television camera device equipped with a plurality of image sensors, for example, a three-plate color camera device, an accurate image can be obtained if the image sensor mounting position deviates from the position to be mounted. Absent. When a so-called registration shift occurs, a correct color image cannot be obtained. For example, Patent Document 1 describes a method for aligning a solid-state imaging device in which a positioning marker is provided at a predetermined position of the imaging device. In addition, in order to grasp the accurate mounting position of the imaging position, it is necessary to perform measurement by attaching a measuring device to the television camera device, and stop normal shooting and correct the mounting position of the imaging device. There was a need to do. Accordingly, the mounting position cannot be corrected during normal operation. Furthermore, due to external stress factors such as vibration and temperature change, for example, the adhesive fixing the image sensor may be deformed, and the position of the aligned image sensor may deviate from a predetermined position. Also, it is desired to realize a color camera device that can correct registration deviation with high accuracy.

Sho58-162181

  Conventionally, due to external stress factors such as vibration and temperature change, for example, an adhesive that fixes the image sensor may be deformed, and the position of the aligned image sensor may deviate from a predetermined position. Therefore, it is necessary to align the image sensor again. However, in order to grasp the mounting position, it is necessary to attach a measuring device to the TV camera device, and during that time, it is impossible to shoot in normal operation. There was a problem.

  An object of the present invention is to provide a television camera apparatus that can easily adjust registration of a plurality of imaging elements.

Another object of the present invention is to provide a television camera apparatus capable of automatically adjusting registration of a plurality of image sensors.
Still another object of the present invention is to provide a television camera device capable of correcting the mounting position of an image sensor even during normal operation (photographing).

  Still another object of the present invention is to provide a television camera apparatus that can easily perform registration adjustment at the time of initial assembly.

  In order to achieve the above object, a television camera device of the present invention includes an optical system, a wavelength resolving optical device that decomposes light from a subject that passes through the optical system, and light that has been decomposed by the wavelength resolving optical device. A plurality of image sensors that convert electrical signals; a video signal processing unit that outputs electrical signals from the plurality of image sensors as video signals; an image sensor position adjustment device that adjusts the position of the plurality of image sensors; and A light source that generates light indicating a reference position of a plurality of image sensors, and a position signal that receives light from the light sources by the plurality of image sensors via the wavelength resolving optical device and detects the position of the received light A position difference calculation device that generates an error signal from the position signal from the position signal detection device; drives the image sensor position adjustment device based on the error signal from the position difference calculation device; of It is configured to the registration of the correction based on the positional deviation of an image element.

  In the television camera device of the present invention, when the plurality of image sensors are attached to the wavelength resolving optical device, the plurality of image sensors are attached to the wavelength resolving optical device in a predetermined positional relationship, and the position difference The image sensor position adjustment device is driven based on an error signal from the arithmetic device, and registration is corrected based on positional deviations of the plurality of image sensors.

  In the television camera device of the present invention, the plurality of image sensors are mounted on the wavelength resolving optical device in a predetermined positional relationship, and the plurality of image sensors convert light from the subject into an electrical signal, A video signal processing unit that outputs an electrical signal as a video signal is operated, and the image sensor position adjustment device is driven based on an error signal from the position difference calculation device, and registration based on positional deviations of the plurality of image sensors. It is comprised so that correction | amendment may be carried out.

  The television camera device of the present invention includes an optical system, a wavelength resolving optical device that decomposes light from a subject that passes through the optical system, and a plurality of light that converts the light decomposed by the wavelength resolving optical device into an electrical signal. An image sensor, a video signal processing circuit that outputs an electrical signal from the plurality of image sensors as a video signal, a light source that generates light indicating a reference position of the plurality of image sensors, and light from the light source A position detection device for detecting the position of the received light received by the plurality of imaging elements via a wavelength resolving optical device, and a position difference calculation device for generating an error signal from the position signal from the position detection device; , A position correction device that corrects a positional shift of the video signal output from the plurality of image sensors based on an error signal from the position difference calculation device, and a resist that is based on the positional shift of the plurality of image sensors. It is configured to correct the Shon.

  As described above, the present invention can realize a television camera apparatus that can easily adjust registration of a plurality of image sensors. Further, since registration of a plurality of image sensors can be automatically adjusted, there is a feature that labor saving and cost reduction can be achieved. Further, according to the present invention, it is possible to realize a television camera device that can correct the mounting position of the image sensor even during normal operation (photographing). In addition, there is a feature that a television camera device that easily adjusts registration at the time of first assembly can be realized, and a high-definition television camera device can be realized.

Next, the best mode for carrying out the present invention will be described based on the following embodiments with reference to the drawings.
[Example 1]
FIG. 1A is a block diagram showing a schematic configuration of one embodiment of the present invention. The TV camera device includes a lens 101, light generation devices 102 and 103, wavelength resolving optical device 104, image sensors 105, 106, and 107, image sensor position detection devices 108, 109, and 110, position difference calculation device 120, and image sensor position adjustment. Devices 111, 112, 113, a video signal processing unit 150, and a video output terminal 151. Reference numeral 100 denotes an optical axis of the lens 101.

  The light generation devices 102 and 103 are, for example, LEDs (L1, L2) and LED drive circuits, and are light sources that generate light indicating a reference position for position adjustment of the image sensors 105, 106, and 107. The light generation devices 102 and 103 are positioned so as to have a predetermined relationship with the optical axis 100 as will be described later, and are fixed to a fixed frame (not shown) of the lens 101, for example.

  FIG. 1B is a plan view seen from the direction of the lens 101 showing the positional relationship between the image sensor 106, the optical axis 100, and the positions P1 and P2 of light from the LEDs L1 and L2, and is indicated by XY coordinates. It is. For example, the optical axis 100 is located approximately at the center of the image sensor 106. P1 indicates the position where the light emitted from the LED L1 of the light generation device 102 has reached the image sensor 106, and the position coordinates thereof are (X1, Y2). P2 indicates the position where the light emitted from the LED L2 of the light generating device 103 has reached the image sensor 106, and the position coordinates thereof are (X2, Y1). The imaging element 106 includes an effective imaging area 180 and an ineffective imaging area 181, but the light positions P 1 and P 2 from the LEDs L 1 and L 2 are disposed on the ineffective imaging area 181. Here, the effective imaging area 180 is an imaging area that is effectively used as a video signal when a subject is imaged, and the ineffective imaging area 181 is an area that is not used as a video signal.

  FIG. 5 is a diagram illustrating a schematic configuration of the image sensor 106. The image sensor 106 is composed of a semiconductor element such as a CCD (Charge Coupled Device) or a MOS (Metal Oxide Semiconductor), for example, and has m × n two-dimensional planar elements, that is, m × n pixels. To do. These m × n pixels are represented by pixel positions P (1, 1)... P (1, n).

  Next, registration correction according to the present invention will be described in detail with reference to FIGS. First, the case where the image sensor 106 is aligned with the optical axis 100 will be described. As described above with reference to FIG. 1B, the positions of light indicating the reference positions irradiated from the LEDs (L1, L2) are P1 (X1, Y2) and P2 (X2, Y1). If these positions coincide with, for example, P (2, 2) and P (m−1, n−1) of the image sensor 106 shown in FIG. 5, the image sensor 106 has a predetermined relationship with the optical axis 100. Suppose you are positioned correctly. However, when P1 (X1, Y2) and P2 (X2, Y1) coincide with, for example, P (3, 3) and P (m, n) shown in FIG. 5, the image sensor 106 is displaced from the mounting position. In other words, it indicates that the optical axis 100 is not correctly positioned with a predetermined relationship, that is, a state deviated from the reference position. A correction method in this case will be described. In the above description, the case where the image sensor 106 is adjusted so as to be positioned on the optical axis 100 in a predetermined relationship has been described. However, the correction of the registration deviation is performed by three image sensors 105, 106, and 107. The position shift of the image sensor is corrected. Therefore, for this purpose, the same correction is necessary for the image sensor 105 and the image sensor 107, but the correction method is the same as that for the image sensor 106, and thus detailed description thereof is omitted. In the above description, the light emitted from the LEDs (L1, L2) is described as being received by one pixel, but in reality, the light emitted from the LEDs (L1, L2) has a predetermined size. Usually, the light is received by a plurality of pixels. Therefore, although the center of a plurality of pixels is used as the reference position, in this embodiment, for the sake of simplicity, the description will be made assuming that the light of the LED is detected by one pixel.

  The wavelength resolving optical device 104 decomposes light from the subject that passes through the lens 101 into R (red), G (green), and B (blue) color components. The image sensors 105, 106, and 107 convert the light separated into R (red), G (green), and B (blue) color components by the wavelength resolving optical device 104 into electrical signals. The image sensor position detection devices 108, 109, and 110 detect position signals of light received by the image sensors 105, 106, and 107. The position difference calculation device 120 generates an error signal from the position signals from the image sensor position detection devices 108, 109, and 110. The image sensor position adjusting devices 111, 112, and 113 are devices that adjust the positions of the image sensors 105, 106, and 107. For example, the image sensor position adjusting devices 111, 112, and 113 are configured by a motor and move the image sensor by driving the motor. The video signal processing unit 150 outputs the electrical signals from the image sensors 105, 106, and 107 as video signals.

  Next, the operation of the present invention will be described. FIG. 2 is a flowchart for explaining the operation of the embodiment of the present invention.

  First, step S201 is a step in which the LEDs (L1, L2) of the light generators 102, 103 generate light indicating a reference position for position adjustment of the image sensors 105, 106, 107. Light generated from the LEDs (L 1, L 2) passes through the wavelength resolving optical device 104 and reaches the image sensors 105, 106, 107. For example, the image sensor 106 reaches P (3, 3) and P (m, n) as shown in FIG. The same can be said for the image sensors 105 and 107. However, it goes without saying that it does not necessarily match P (3, 3), P (m, n) due to positioning errors of the image sensors 105 and 107.

  The image sensor position detection devices 108, 109, and 110 detect the position information of the light received by the image sensors 105, 106, and 107 (step S202). For example, in the case of the image sensor 106, the pixels P (3, 3) and P (m, n) detect light generated from the LEDs (L1, L2) (step S202). The position difference calculation device 120 calculates, as a correction value, an error of a position shifted from the normal time from the light position information detected by the image sensor position detection devices 108, 109, and 110 and the normal light position information. (Step S203). That is, the error position is calculated from the error position P (3, 3) for the correct pixel position P (2, 2) and the error position P (m, n) for the pixel position P (m-1, n-1). FIG. 5 shows an example in which one pixel is shifted in the row direction and the column direction.

  The image sensor position adjustment devices 111, 112, and 113 move the position of the image sensor in accordance with the error calculated in step S203 (step S204). That is, the image sensor position adjusting device 112 shifts the image sensor 106 by one pixel in the row direction and the column direction, the position P (3, 3) is set to the pixel position P (2, 2), and the position P (m, n ) Is moved to the pixel position P (m−1, n−1) by moving the image sensor 106 by the image sensor position adjusting device 112 so that the optical axis 100 can be in a predetermined relationship. In this manner, the positions of the image sensor 105 and the image sensor 107 can be similarly corrected. As a result, the positions of the image sensors 106, 105, and 107 can be corrected.

  In the above embodiment, the case where three image sensors are used has been described. However, the present invention is not limited to this, and it goes without saying that the present invention can be applied to a television camera apparatus using two or more image sensors. Absent.

As described above, in the present invention, the mounting position of the image sensor can be corrected by moving the image sensor with the amount of deviation of the image sensor from the predetermined position as a correction value, and the registration deviation can be corrected. it can.
[Example 2]
Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, two light generating devices that emit light indicating the reference position are used, and each is arranged at a diagonal position. However, in the second embodiment, four light generators 102, 103, 602, and 603 are used as shown in FIG. In FIG. 6, L3 and L4 are LEDs, for example. In addition, the same code | symbol is attached | subjected to the same thing as FIG. The operation of the television camera apparatus shown in FIG. 6 is substantially the same as the operation of the television camera apparatus shown in FIG. When positioning the image sensors 105, 106, and 107 using the four light generating devices 102, 103, 602, and 603 as in this embodiment, the positions of the four corners of each image sensor are accurately matched. Position correction is possible. Therefore, in a television camera device that requires a high-definition and clear-colored image, such as a high-definition television camera device, registration displacement can be performed with high accuracy, and extremely effective alignment is possible. Is the method.
Example 3
Next, a third embodiment of the present invention will be described. In the first and second embodiments, the position correction of the image sensor is realized by correcting the positional deviation of the image sensor by moving the image sensor. In a third embodiment of the present invention, a method for realizing position correction of an image sensor by applying an error of position information to image information without moving the image sensor itself will be described.

  FIG. 3 is a block diagram showing a schematic configuration of a third embodiment of the present invention. The TV camera device includes a lens 301, light generation devices 302 and 303, a wavelength resolving optical device 304, image sensors 305, 306, and 307, image sensor position detection devices 308, 309, and 310, position difference calculation devices 320 and 321, and R signals. A position correction device 322, a B signal position correction device 323, a video signal processing unit 150, and a video signal output terminal 151 are provided. As for the lens 301 to the image sensor position detecting device 310, the lens 101, the light generating devices 102 and 103, the wavelength resolving optical device 104, the image sensors 105, 106, and 107 shown in FIG. 108, 109, and 110, respectively, and detailed description thereof is omitted.

  Next, the operation of the third embodiment of the present invention will be described. FIG. 4 is a flowchart for explaining the operation of the third embodiment of the present invention.

  First, step S401 is a step in which the LEDs (L1, L2) of the light generators 302, 303 generate light indicating a reference position for position adjustment of the image sensors 305, 306, 307.

  The image sensor position detection devices 308, 309, and 310 detect position information of light received by the image sensors 305, 306, and 307 (step S402). For example, the position difference calculation device 320 has an error position between the G (green) signal output from the image sensor 306 and the R (red) signal output from the image sensor 305 (for example, the same pixel position as described in FIG. 5). (Step S403). This error position information is supplied to the R signal position correction device 322, and the R signal position correction device 322 corrects the error position of the R signal to the R signal output from the image sensor 305 (step S404). Similarly, the position difference calculation device 321 may, for example, have an error position between the G (green) signal output from the image sensor 306 and the B (blue) signal output from the image sensor 307 (for example, as described in FIG. 5). Is calculated) (step S403). This error position information is supplied to the B signal position correction device 323, and the B signal position correction device 323 corrects the error position of the B signal to the B signal output from the image sensor 307 (step S404).

  Then, the R signal in which the error position of the R signal is corrected and the B signal in which the error position of the B signal is corrected are respectively supplied to the video signal processing unit 150. Further, the G signal is supplied from the image sensor 306 to the video signal processing unit 150. Therefore, in the video signal processing unit 150, the G signal and the position-corrected R and B signals are combined, subjected to predetermined signal processing as appropriate, and output from the video signal output terminal 151. In this embodiment, the case where the position error of the R signal and the B signal is corrected based on the G signal has been described, but it is needless to say that the R signal or the B signal can be used as a reference.

As described above, since the present invention is configured to correct the positional deviation by correcting the video signal, there is an advantage that the image sensor position adjusting apparatus according to the first or second embodiment is not necessary.
Example 4
Next, a fourth embodiment of the present invention will be described below. As described above, the television camera apparatus is configured such that, for example, an adhesive that fixes the image sensor is deformed due to an external stress factor such as vibration or temperature change, or a secular change, and the position of the aligned image sensor is changed. May deviate from a predetermined position. In such a television camera device, in such a case, there is only a method of stopping the operation of the television camera device again, disassembling the imaging portion, and adjusting again. However, in the present invention, it is possible to adjust the position of the image sensor while the television camera device is in operation. Therefore, the broadcast camera apparatus and the commercial camera apparatus have extremely excellent characteristics. In particular, in a high-definition TV camera such as a high-definition television, even a slight misalignment can degrade the image quality, and thus the present invention is useful.

  Although the feature of the present invention has been described with reference to FIG. 1B, the position of the light output from the light sources L1 and L2 that determines the reference position of the image sensor is on the ineffective image area 181 of the image sensors 105, 106, and 107. It has been described that it is arranged to be located in This means that the effective imaging area 180 is used for photographing the subject, and the ineffective imaging area 181 is not used. Therefore, the alignment of the image sensors 105, 106, and 107 is that the positional deviation can always be detected and the position can always be corrected even when the television camera apparatus is operated. Therefore, it is possible to correct the displacement of the image sensors 105, 106, and 107 while the television camera device is always operated. Further, this positional deviation correction may be performed constantly, but can also be performed periodically.

  In the present embodiment, the registration correction during the operation of the television camera apparatus has been described. However, the present invention is not limited to this, and in the case where the correction is not performed during the operation, the imaging elements 105, 106, and 107 are ineffective imaging. Needless to say, the present invention can also be applied to the case where it is not necessary to provide a region.

  Although the present invention has been described in detail above, it is needless to say that the present invention can also be applied when assembling a television camera apparatus. For example, when the television camera apparatus is assembled, the image sensor is roughly positioned in advance on the optical axis 100, and then registration adjustment is performed by the method described in each embodiment of the present invention, thereby facilitating registration correction. Can be done.

  Although the present invention has been described above in detail, it is needless to say that the present invention is not limited to the embodiments of the television camera apparatus described herein, and can be applied to other television camera apparatuses.

It is a block diagram which shows schematic structure of one Example of this invention. It is a flowchart for demonstrating operation | movement of one Example of this invention. It is a block diagram which shows schematic structure of other one Example of this invention. It is a flowchart for demonstrating operation | movement of another Example of this invention. It is a figure which shows schematic structure of the image pick-up element for demonstrating the principle of this invention. It is a block diagram which shows schematic structure of other one Example of this invention.

Explanation of symbols

101, 301: Lens, 102, 103, 302, 303, 602, 603: Light generation device, 104, 304: Wavelength resolving optical device, 105, 106, 107, 305, 306, 307: Image sensor, 108, 109, 110, 308, 309, 310: Image sensor position detection device, 120, 320, 321: Position difference calculation device, 111, 112, 113: Image sensor position adjustment device, 150: Video signal processing unit, 151: Video output terminal 370 : Image composition device.

Claims (3)

  An optical system, a wavelength resolving optical device that decomposes light from a subject that passes through the optical system, a plurality of image sensors that convert light decomposed by the wavelength resolving optical device into electrical signals, and the plurality of image sensors A video signal processing unit that outputs an electrical signal from the image sensor, an image sensor position adjustment device that adjusts the position of the plurality of image sensors, a light source that generates light indicating a reference position of the plurality of image sensors, Light from the light source is received by the plurality of imaging elements via the wavelength resolving optical device, and a position signal detection device that detects the position of the received light, and an error signal from the position signal from the position signal detection device A position difference calculation device that generates the image difference, drives the image sensor position adjustment device based on an error signal from the position difference calculation device, and corrects registration based on the positional deviation of the plurality of image sensors. TV camera device, characterized in that.   2. The television camera device according to claim 1, wherein when the plurality of image pickup devices are attached to the wavelength resolving optical device, the plurality of image pickup devices are attached to the wavelength resolving optical device in a predetermined positional relationship, and the position difference is set. A television camera apparatus, wherein the image sensor position adjustment device is driven based on an error signal from an arithmetic device, and registration is corrected based on positional deviations of the plurality of image sensors.   The television camera device according to claim 1, wherein the plurality of image pickup devices are mounted on the wavelength resolving optical device in a predetermined positional relationship, and the plurality of image pickup devices convert light from the subject into an electrical signal, A video signal processing unit that outputs an electrical signal as a video signal is operated, and the image sensor position adjustment device is driven based on an error signal from the position difference calculation device, and registration based on positional deviations of the plurality of image sensors. The television camera device is characterized in that the correction of the image is corrected.

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