JP4116853B2 - Image editing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image editing apparatus that processes moving image data.
[0002]
[Prior art]
Conventionally, as motion image data as a motion image, Motion JPEG generally used in the Internet, a digital camera, or the like is known. Motion JPEG is a method of making a JPEG image as a standard format of a still image appear like a moving image by performing high-speed expansion processing and continuously displaying it. In order to synthesize motion image data such as Motion JPEG, processing is usually performed using an image editing function of an editing device such as a digital camera or a personal / personal computer.
[0003]
In order to synthesize moving image data, when the editing device pastes and combines the two moving image data to be combined as they are, the display of the combined moving image data is suddenly switched at the combining location. For this reason, the editing device performs a process such as a fade process that superimposes two moving image data and processes the two moving image data so that the two images gradually become lighter or darker at the synthesized part. The images are switched to each other.
[0004]
However, if fade processing or the like is performed on the moving image data, the image quality is likely to be deteriorated at the synthesized portion. For this reason, techniques for preventing image quality degradation have been proposed (see, for example, Patent Document 1 and Patent Document 2). According to this technique, it is possible to reduce image quality deterioration in the synthesis of moving image data.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 06-46412 (page 3-4, FIG. 1)
[Patent Document 2]
JP 2000-57992 A (page 3-4, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, in the above prior art, since the moving image data is directly manipulated, image quality deterioration remains. In addition, the directly-combined moving image data that has been directly manipulated is a change from the image data before the combining. To re-edit to perform a different combination, the moving image data before the combining process is used again for editing. I had to.
[0007]
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an image editing apparatus capable of suppressing image quality deterioration and facilitating editing by combining moving image data.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a selection unit that selects first moving image data and second moving image data from predetermined moving image data, and a first unit selected by the selection unit. At least one of moving image data and second moving image data Converting means for converting a still image group consisting of a series of still image data having an alpha channel as transparency information each representing transparency And when combining the first moving image data and the second moving image data, at least the front side and the rear side of the predetermined combining portion Of the group of still images converted by the converting means, the still image data nearest to the synthesis location is copied and continuously copied by a predetermined number of frames, and inserted into the synthesis location as still image data whose transparency is to be changed. , By changing the value of the alpha channel for the still image data to be changed in transparency Synthesizing means for synthesizing by changing the transparency.
[0009]
The image editing apparatus of the present invention includes selection means. The selection means selects first moving image data and second moving image data from predetermined moving image data. As a result, the first moving image data and the second moving image data to be combined are selected.
[0010]
Conversion means Adds transparency information to one or both of the first moving image data and the second moving image data selected by the selection means. The transparency information represents the degree of use (transparency) when the moving image data is used for the density component and color component of the moving image data, and represents how much it can be seen through. That is, the greater the transparency information, the greater the transparency of the moving image data, and the higher the rate of see-through. For this reason, the larger the transparency information, the thinner the moving image. Also, the smaller the transparency, the darker the moving image. For example, when the transparency is zero, it looks the same as a moving image without adding transparency information. A layer called a so-called α channel can be used for this transparency information.
[0011]
The synthesizing unit changes the transparency of the moving image data to which the transparency information is added when synthesizing the first moving image data and the second moving image data to which the transparency information is added to at least one by the adding unit. . The change of the transparency may be changed based on a predetermined function so that the transparency is gradually changed, or may be changed based on a predetermined change value of transparency. By this change, the rate at which the moving image data can be seen through can be changed, and the moving image data itself does not change. For this reason, the display image of the synthesized moving image data can be provided in a certain way at the synthesis location.
[0012]
Therefore, since the composition is performed by changing the transparency information added to the moving image data without directly manipulating the moving image data, the image quality deterioration does not occur in the composition of the moving image data. In addition, since the moving image data at the synthesis location can be changed in transparency, even if the moving image data is cut out from any location at the synthesis location, it can be restored to the original moving image data by changing the transparency. I can do it. For this reason, moving image data can be easily edited.
[0013]
When editing moving image data, it is preferable to convert it into an editable format. Therefore, Conversion means Converts the moving image data into a still image group consisting of a series of still image data each having the transparency information. You The Thereby, moving image data can be handled as a group of still images consisting of a series of still image data, and transparency information can be changed in units of still images by adding transparency information to each of the still image data. For this reason, when editing moving image data, it is possible to specify an editing portion in units of still images, and it is possible to easily edit moving image data.
[0014]
In the moving image switching portion, only the moving image switching portion may be inserted. in front Synthesizing means Is , When synthesizing the first moving image data and the second moving image data, at least in the combination portion of the still image group converted by the conversion means on the front side and the rear side of the predetermined combination portion. The most recent still image data is copied for a predetermined number of frames and is continuously inserted into the synthesis location as still image data to be changed in transparency, and the value of the alpha channel is set for the still image data to be changed in transparency. Change the transparency by changing the composition . Thereby, without changing the transparency of the first moving image data and the second moving image data, Picture Synthesis can be performed with data inserted so that images are switched smoothly.
[0015]
The synthesizing means can change the transparency stepwise toward the synthesis location when the transparency is changed and synthesized. As a result, it is possible to change the transparency of the image at a certain point at the synthesis location and switch the image gently.
[0016]
The image editing apparatus of the present invention further includes a synthesis location setting unit that sets a synthesis location for at least one of the first moving image data and the second moving image data. Is the composite location set by the composite location setting means, A still image whose transparency is to be changed is reproduced by replicating the still image data nearest to the synthesized portion in the still image group converted by at least the conversion means on the front side and the rear side of the synthesized portion and continuously copying the predetermined number of frames. Inserted as image data into the synthesis location, and synthesizes the still image data subject to change of transparency by changing the transparency by changing the value of the alpha channel. . Thereby, the user can arbitrarily set the synthesis part of the moving image data. That is, in the synthesis of the first moving image data and the second moving image data, the user can arbitrarily set the synthesized portion of the moving image data according to the contents of the moving image data or the desire of the user who performs the composition work. Is possible.
[0017]
The composite location setting means may include range setting means for setting a range of moving image data as a composite location. Therefore, when the user sets an arbitrary range, the degree of image switching at the synthesis location can be adjusted. For example, if the user wants to gradually switch the displayed image at the synthesis location, the range of the moving image data as the synthesis location may be set wide so that the transparency gradually changes. If the user wants to suddenly switch the displayed image at the synthesis location, the range of the moving image data as the synthesis location may be set narrow so that the transparency changes abruptly.
[0018]
The image editing apparatus may further include display means for displaying the moving image data. This display means can display the first moving image data and the second moving image data to be combined, and the combined moving image data, so that the user can easily confirm.
[0019]
The image editing apparatus may further include capture means for capturing the moving image data. With this capturing means, it is possible to capture and edit moving image data obtained or edited by an external device such as a digital camera or a PC.
[0020]
The image editing apparatus may further include a storage unit that stores the moving image data in advance. This storage means stores moving image data and synthesized moving image data, so that the moving image can be used when editing moving image data or re-editing moving image data synthesized in the past. Data can be increased and reused, improving user flexibility.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
An image editing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0022]
FIG. 1 is a block diagram showing the main configuration of the image editing apparatus 10 according to the present embodiment. The image editing apparatus 10 includes a reading unit 12, a display unit 14, an operation unit 16, a control unit 18, and a storage unit 20. The control unit 18 includes a microcomputer (not shown) and is connected to each of the reading unit 12, the display unit 14, and the storage unit 20, and can exchange data and commands with each other. .
[0023]
The reading unit 12 is an interface function unit for reading moving image data stored in the storage medium 22, and can be configured by a receiving device that receives transmission data and a reading device that reads and writes data on the storage medium. Examples of the storage medium 22 include a removable disk, a digital camera, a CD-R, and a VTR tape. The display unit 14 is for displaying moving image data and various input items, and includes a display device such as a CRT or LCD. The operation unit 16 is used to input an instruction using the image editing apparatus 10, and includes a keyboard as an example.
[0024]
The control unit 18 is a functional unit that performs synthesis processing of moving image data, and includes a memory (not shown) that stores a processing routine described later. The control unit 18 includes a microcomputer including a CPU, a ROM, and a RAM (not shown). The processing routine may be stored in a ROM or RAM (not shown). Moreover, you may memorize | store in the memory | storage part 20 mentioned later. The control unit 18 includes processing functions. In the present embodiment, the control unit 18 includes a format conversion processing unit 18A, an image generation processing unit 18B, and a synthesis processing unit 18C as three main functional units. . Although these details will be described later, as an outline, the format conversion processing unit 18A has a function of converting moving image data into data in a format corresponding to transparency information representing transparency. The image generation processing unit 18B has a function of generating a fade-in image and a fade-out image from moving image data. Furthermore, the composition processing unit 18C has a function of performing composition processing of moving image data.
[0025]
In the present embodiment, a case will be described in which a still image data group in which a plurality of still images are continuous in time series is handled as moving image data. That is, as shown in FIG. 3, the moving image data 30 includes a header 30B and a plurality of continuous still image data 30A. The header 30B mainly includes the number of still image data 30A constituting the moving image data 30 and various parameter information of the still image data 30A. The various parameter information includes information indicating the recording format of still image data such as JPEG of the still image data 30A. In the example of FIG. 3, as the still image data 30A, moving image data 30 in which a plurality of still image data recorded in the JPEG2000 format is continued and the header 30B is continued in the header portion is shown.
[0026]
In the present embodiment, a data format in which the transparency can be set for each of the still image data 30A of the moving image data 30 is adopted. The transparency is a degree representing how the image is seen, and represents how much the image is provided as a transparent image. That is, when the transparency is set in the range of 0 to 100, transparency 0 corresponds to providing an image in a state where it is not seen through at all, and the density and color of the image data are provided each time. On the other hand, a transparency of 100 corresponds to providing an image in a state where it can be seen through completely, and the density and color of image data are not provided at all.
[0027]
An example of a still image data format in which transparency can be set is a data format such as JEPG2000 or PNG. These data formats can include transparency information indicating transparency as a layer called an α channel. For this reason, the transparency of the still image data 30A can be set by the α channel. For example, when the value of the α channel is made to correspond in the range of 0.0 to 1.0, the α channel 0.0 corresponds to transparency 0 and the α channel 1.0 corresponds to transparency 100.
[0028]
The storage unit 20 is for storing moving image data used in editing, various processing data, and the like. The various processing data includes setting data (for example, the number of fade-in frames and the number of fade-out frames described later) used during editing.
[0029]
The display unit 14 corresponds to the display unit of the image editing apparatus of the present invention, and the reading unit 12 corresponds to the capture unit.
[0030]
Next, the operation of the above embodiment will be described with reference to the drawings.
[0031]
In the image editing apparatus 10, the power is turned on by a power switch (not shown), the processing routine of FIG. 2 is executed, and the process proceeds to step 100. In step 100, an initial setting process is executed. This initial setting process is a process of reading various processing data stored in the storage unit 20 and setting it as an initial value. Examples of various processing data include the number of fade-in frames and the number of fade-out frames. Here, fade-in and fade-out refer to the appearance of an image when editing a moving image. Fade-out refers to a state where the density and color of a moving image gradually fade, and fade-in refers to a moving image. This represents a state in which the density and color of the color gradually increase.
[0032]
In this embodiment, moving image data is handled as a sequence of still image data, so when performing fade-in and fade-out, the fade-in and fade-out times are set by specifying the number of still images in the still image data. It becomes possible to do.
[0033]
Accordingly, the number of fade-in frames and the number of fade-out frames represent the number of still images of moving images whose transparency, that is, density and color, is changed for moving images in and out. If the number of frames of a still image is large, the change period of the moving image becomes long, and if the number of frames is small, it becomes short.
[0034]
In the next step 102, editing target moving image selection processing is executed. The editing target moving image selection processing is to select editing target, that is, moving image data to be synthesized. In the present embodiment, a case will be described in which moving image data A and moving image data B shown in FIG. When selecting the moving image data A and the moving image data B, for example, first, the reading unit 12 reads various moving image data stored in the recording medium 22. Examples of moving image data stored in the storage medium 22 include an AVI file, Motion JPEG, and Motion JPEG 2000. Next, as information representing the read moving image data, for example, a list of moving image data names, capture times, and the like is displayed on the display unit 14. The displayed moving image data may be urged to be selected by an instruction from the operation unit 16 such as a keyboard. By reading this instruction signal, moving image data can be selected. Note that the moving image data of the moving image to be synthesized may be stored in the storage unit 20 in advance.
[0035]
Next, in step 104, it is determined whether or not the moving image data A and moving image data B selected in step 102 are α channel compatible moving image data. The determination in step 104 can be made by determining whether the header 30B of the moving image data includes information indicating that the recording format of the still image data 30A corresponds to the α channel. For example, if the header 30B includes parameter information (format information) indicating that the recording format of the still image data 30A is an α channel compatible data format such as JEPG2000 or PNG, the moving image data corresponds to the α channel. Can be determined.
[0036]
If both the moving image data A and the moving image data B to be edited selected in step 104 are affirmed in step 104 and are to be edited, the flow proceeds to step 108. On the other hand, when the result in Step 104 is negative and one or both of the moving image data A and the moving image data B are moving image data not corresponding to the α channel, the process proceeds to Step 106.
[0037]
In step 106, format conversion processing is executed, and the process proceeds to step 108. The format conversion process is a process of converting the moving image data determined to be in the format not corresponding to the α channel in step 104 to the moving image data having the format corresponding to the α channel by the format conversion processing unit 18A. This format conversion processing corresponds to the processing function in the format conversion processing unit 18A of the control unit 18. That is, the format of moving image data not corresponding to the α channel is a moving image composed of a plurality of recording still image data 30A corresponding to the α channel and the header 30B having the configuration shown in FIG. This is a process of converting to data 30.
[0038]
Therefore, when step 106 is completed, all moving image data to be edited is converted into α channel compatible moving image data.
[0039]
In step 108, a moving image playback A process is executed. The moving image reproduction A process is a process for displaying the moving image of the moving image data A on the display unit 14. For this reason, the user can confirm the content of the moving image data A to be synthesized on the display unit 14.
[0040]
In the next step 110, it is determined whether or not a cut-out point instruction has been made. The cut-out point represents a range to be cut out of the moving image data A cut out to synthesize the moving image data A and the moving image data B, and is indicated by the cut-out position and cut-out direction of the moving image data A.
[0041]
In the present embodiment, as shown in FIG. 4, when a cutout position PA and a cutout direction X (direction in which the header is located from cutout position PA) are designated as the cutout points designated in step 110. Will be explained. In the present embodiment, a description will be given of a case where the cutout point is indicated by the cutout position and cutout direction of the moving image data A, but the cutout point may be indicated by two cutout positions of the moving image data A. . In this case, the cutout range of the moving image data A is moving image data between the two cutout positions indicated.
[0042]
The determination in step 110 can be made by determining whether or not a cutting point instruction has been made by a user operation instruction from the operation unit 16. For example, the still image list of the moving image data A shown in FIG. When the user is prompted to input a clipping point of the moving image data A from the still image list of the still image data included in the displayed moving image data A, and the clipping point is input by the operation unit 16 This can be determined by reading the cut-out point signal output to the.
[0043]
It should be noted that the clip point can be instructed while reproducing a moving image. In this case, the reproduction of the moving image is started, and an instruction for a clipping point is prompted during the reproduction. With this instruction point as a reference, an input instruction is further urged as to which of moving image data before or after that is to be cut out. The cutout range can be determined from these instructions.
[0044]
In step 112, a memory process for storing the cut-out point instructed in step 110 in the storage unit 20 is executed. In the present embodiment, the cutout position PA and the cutout direction X are stored in the storage unit 20 as cutout points. The information representing the cutout position PA includes, for example, the number of still images in the still image data from the header to the cutout position PA of the moving image data A.
[0045]
In the next steps 114 to 118, the same processing as that in steps 108 to 112 is performed on the moving image data B.
[0046]
That is, in step 114, the moving image reproduction B process is executed, the moving image of the moving image data B is displayed on the display unit 14, and the process proceeds to step 116. In step 116, it is determined whether or not a cut-out point instruction has been made. In step 118, memory processing for storing the cut point information instructed in step 116 in the storage unit 20 is executed.
[0047]
In the present embodiment, as shown in FIG. 4 (B), as the instructed extraction point, the extraction position PB and the extraction direction Y (the direction opposite to the direction in which the header is located from the extraction position PB) are provided. The case where it is instructed will be described.
[0048]
In the next step 120, the negative determination is repeated until the composite point instruction is given. The compositing point instruction is for instructing a combination for compositing the cut-out point of the moving image data A and the cut-out point of the moving image data B, which is instructed in steps 110 and 116. That is, after the moving image data A cut out at the cutout point, the moving image data B cut out at the cutout point is synthesized, or after the moving image data B cut out at the cutout point, the moving image data A cut out at the cutout point One of these is instructed. The determination in step 120 can be made by determining whether or not there is an instruction for a synthesis point by the operation unit 16.
[0049]
In step 122, a memory process for storing the synthesis point information of the moving image data instructed in step 120 in the storage unit 20 is executed. In the present embodiment, when the moving image data A cut out at the cut-out point is combined with the moving image data B cut out at the cut-out point, a composite point instruction is given, and the combined point information is stored in the storage unit 20. Will be explained.
[0050]
Next, in step 124, it is determined whether or not an instruction to change the initially set number of fade-in frames and fade-out frames has been issued. This determination can be made by determining the presence / absence of a frame number change instruction by the operation unit 16. For example, the display unit 14 displays the number of fade-in frames and the number of fade-out frames set as initial values. Whether or not the displayed frame number is to be changed is prompted by prompting the user to read the frame number change instruction signal output when the operation unit 16 is instructed to change the frame number. That's fine.
[0051]
If the determination in step 124 is affirmative, the process proceeds to step 126, and fade-in frame number and fade-out frame number setting processing is executed. The fade-in frame number and fade-out frame number setting process is a process of updating the fade-in frame number and the fade-out frame number stored in the storage unit 20 as initial values to the frame number instructed in step 124. When the fade-in / fade-out frame number setting process is completed in step 126, the process proceeds to step 128. If the number of frames is unchanged from the initial value and the result in Step 124 is negative, the number of frames that is the initial value is not updated, and the process proceeds to Step 128.
[0052]
In step 128, fade-out image generation processing is executed. In the fade-out image generation process, the moving image data is configured to fade out the moving image based on the cut-out point information, the frame number information, and the synthesis point information of the moving image data A stored in the storage unit 20. This is a process for generating still image data. In other words, in order to perform fade-out that makes the image look like the color and density of the moving image gradually fade, still image data of a specified number of frames based on various set information This is a process for changing the value of the α channel. This fade-out image generation processing corresponds to a processing function in the image generation processing unit 18B of the control unit 18.
[0053]
Still image data for performing fade-out is generated from moving image data immediately before the synthesis point based on the synthesis point information. Here, a fade-out image is generated from the moving image data A. In the present embodiment, for simplicity of explanation, a case where 3 is set as the number of frames will be described, but the present invention is not limited to this. In addition, there are two types of processing for fading out. The first fade-out process is a process for adjusting the alpha channel of the moving image data itself, and the second fade-out process is to copy the selected (designated) still image by the number of fade-out frames, insert it, and insert the alpha channel. It is a process to adjust.
[0054]
As shown in FIG. 5A, the still image data of the moving image data A whose α channel value is to be changed is upstream from the cutout position PA of the moving image data A (in the direction opposite to the reproduction direction). This is still image data of three consecutive still images. In this case, as the still image data whose α channel value is to be changed, the still image data A-a1, A-a2, and the still image data A-a1, A-a2, and Let A-a3.
[0055]
In the first fade-out process, three frames of still image data upstream from the cutout position PA in the moving image data A become the target still image data A-a1, A-a2, and A-a3.
[0056]
In the second fade-out process, first, the still image data nearest to the synthesis point of the moving image data A, that is, the still image data corresponding to the cutout position PA is replicated in three frames, and the still image data to be changed And In this case, the still image data for which the α channel value is to be changed is the still image data A-a11 obtained by replicating three frames in order from the still image data A-a1 of the still image corresponding to the cutout position PA toward the downstream side. , A-a12, and A-a13. Note that these still image data A-a11, A-a12, and A-a13 are inserted at the time of composition processing described later.
[0057]
In the present embodiment, a case where the second fade-out process is executed will be described. Therefore, in step 128, first, the still image data A-a1 of the still image corresponding to the cut-out position PA of the moving image data A is read, and the same still image data A-a11, A-a12, and three frames copied, A-a13 is generated. Then, the value of the α channel of the still image data is changed so that the value of the α channel increases stepwise in the reproduction direction.
[0058]
For example, the α channel value of still image data A-a11 is set to 0.0, the α channel value of still image data A-a12 is set to 0.5, and the α channel value of A-a13 is set to 1.0. From the still image data A-a11 to the still image data A-a13, the value of the α channel of each still image data is changed so that the value of the α channel gradually increases. As a result, it is possible to perform a fade-out in which the color and density of the moving image of the moving image data A are visually recognized so that the color and density of the moving image gradually become thinner as they are reproduced.
[0059]
Next, in step 130, fade-in image generation processing is executed. The fade-in image generation process is substantially the same as the above-described fade-out image generation process. The fade-out image generation process is a process that generates a still image so that the moving image gradually becomes thinner. The image generation process is a process of generating a still image so that the moving image becomes gradually darker.
[0060]
In this fade-in image generation process, still image data constituting the moving image data is generated based on the cut-out point information, the frame number information, and the synthesis point information of the moving image data B stored in the storage unit 20. . In other words, in order to perform fade-in that makes an image look like the color and density of a moving image gradually increase, a still image of a specified number of frames based on various set information This is a process of changing the value of the α channel of data.
[0061]
Still image data for performing fade-in is generated from moving image data immediately after the synthesis point based on the synthesis point information. Here, a fade-in image is generated from the moving image data B. In the present embodiment, for simplicity of explanation, a case where 3 is set as the number of frames will be described, but the present invention is not limited to this. In addition, the implementation of fade-in includes the following two types of processing, similar to the implementation of fade-out. The first fade-in process is a process for adjusting the α channel of the moving image data itself, and the second fade-in process copies and inserts the selected (designated) still image by the number of fade-in frames. To adjust the α channel.
[0062]
As shown in FIG. 5B, the still image data of the moving image data B whose α channel value is to be changed continues from the cutout position PB of the moving image data B toward the downstream side (reproduction direction). This is still image data of a three-frame still image. In this case, as the still image data whose α channel value is to be changed, the still image data B-b1, B-b2, and Let B-b3.
[0063]
In the first fade-in process, the still image data of three frames downstream from the cutout position PB in the moving image data B becomes the target still image data B-b1, B-b2, and B-b3. .
[0064]
In the second fade-in process, first, the still image data nearest to the synthesis point of the moving image data B, that is, the still image data corresponding to the cut-out position PB is replicated in three frames, and the still image to be changed Data. In this case, the still image data for which the value of the α channel is to be changed is still image data B-b11 obtained by replicating three frames in order from the still image data B-b1 of the still image corresponding to the cut-out position PB toward the upstream side. , B-b12, and B-b13. Note that these still image data B-b11, B-b12, and B-b13 are inserted at the time of composition processing described later.
[0065]
In the present embodiment, a case where the second fade-in process is executed will be described. Therefore, in step 130, first, the still image data B-b1 of the still image corresponding to the cut-out position PB of the moving image data B is read, and the same still image data B-b11, B-b12 copied three frames, and B-b13 is generated. Then, the value of the α channel of the still image data is changed so that the value of the α channel gradually decreases in the reproduction direction.
[0066]
For example, the α channel value of the still image data B-b13 is set to 1.0, the α channel value of the still image data B-b12 is set to 0.5, and the α channel value of the still image data B-b11 is set to 0. As 0, the α channel value of each still image data is changed so that the α channel value gradually decreases from the still image data B-b13 to the still image data B-b11. As a result, it is possible to perform a fade-in that is visually recognized so that the color and density of the moving image of the moving image data B gradually increase as it is reproduced.
[0067]
In the next step 132, composition processing is executed. The synthesizing process includes the cut-out point information of the moving image data A, the cut-out point information of the moving image data B, and the combining point instruction information stored in the storage unit 20, the fade-out still image data generated in step 128, and This is a process of combining the cut-out point of moving image data A and the cut-out point of moving image data B from the fade-in still image data generated in step 130.
[0068]
As described above, there are four types of synthesis processing by combining the first and second fade-in processing and the first and second fade-out processing.
[0069]
In the present embodiment, as described above, the second fade-in process and the second fade-out process are adopted, so that the composition process in step 132 is performed from each of the moving image data A and the moving image data B. A process of generating a fade-in image or a fade-out image for the specified still image data, inserting the generated still image data, and combining the generated still image data will be described.
[0070]
First, the cut-out point of the moving image data A, the cut-out point of the moving image data B, the still image data generated from the moving image data A by the second fade-out process, and the moving image data B generated by the second fade-in process Read out still image data. Next, still image data A-a11, A-a12, and A-a13 are inserted downstream from the still image data A-a1 corresponding to the cutout position PA of the moving image data A. Further, still image data B-b13, B-b12, and B-b11 are inserted downstream from the still image A-a13. Finally, the cut-out point of the moving image data B is synthesized on the downstream side of the still image data B-b11. In the present embodiment, when the still image data A-a13 and the still image data B-b13 are displayed on the display unit 14, the value of the α channel is 1.0, so the density and color of the still image Are not displayed at all and can be treated as the same still image. Both of these still images may be inserted or may be common.
[0071]
FIG. 5C shows the vicinity of the synthesis point as an image of the synthesized moving image data obtained by the synthesis process in step 132. As can be seen from the figure, the density and color of the still image gradually fades or fades out so that the still image fades out and fades in as it moves in the playback direction (the direction of arrow P in FIG. 5C). It gradually gets darker. That is, it becomes lighter in the order of still image data A-a1 to A-a13 (B-b13) and becomes darker in the order of still image data B-b13 to B-b1.
[0072]
Therefore, the moving image data shown in FIG. 6 is synthesized. The moving image data generated by the synthesis process is obtained after the α channel value of the still image data corresponding to the switching portion from the moving image data A to the moving image data B becomes smaller stepwise in the reproduction direction. Increase in steps. For this reason, when the synthesized moving image data is reproduced on the display unit 14, the color and density of the moving image gradually become thinner as the moving image data and the moving image data B are switched at the switching portion. It is visually recognized as dark.
[0073]
Next, in step 134, a memory process for storing the synthesized moving image data in the storage unit 20 is performed, and this routine ends.
[0074]
As described above, in the present embodiment, since the moving image data to be edited is not directly manipulated and the α channel value of the still image data constituting the moving image data is changed and synthesized, the moving image data There is no degradation in image quality in the synthesis of
[0075]
Still image data whose α channel value has been changed during the combining process can return the α channel to the value before the change. For this reason, even when moving image data is cut out from any place of the synthesized moving image data, the value of the α channel of the still image data constituting the moving image data is restored (that is, set to 0.0). Thus, it is possible to return to the original moving image data before synthesis. Therefore, the moving image data can be easily edited.
[0076]
Note that the processing of step 102 corresponds to the function of the selection unit of the image processing apparatus of the present invention, the processing of step 106 corresponds to the function of the adding unit, and the processing of step 132 corresponds to the combining unit. In addition, the determinations in steps 110 and 116 correspond to the function of the synthesis location setting unit of the image processing apparatus of the present invention, and the processing in step 126 corresponds to the function of the range setting unit.
[0077]
Further, the present invention is not limited to the above embodiment. For example, in the present embodiment, the case where both the fade-out image generation process and the fade-in image generation process are performed has been described, but either one of the processes may be performed.
[0078]
【The invention's effect】
As described above, according to the image editing apparatus of the present invention, transparency information is added to moving image data, and this transparency information is changed to synthesize moving image data. The effect that it can be edited is obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main configuration of an image editing apparatus according to an embodiment.
FIG. 2 is a flowchart showing a flow of processing in the image editing apparatus according to the embodiment of the present invention.
FIG. 3 is an image diagram showing a schematic configuration of moving image data corresponding to an α channel.
4A and 4B are image diagrams showing moving images to be combined according to the embodiment of the present invention, where FIG. 4A shows moving image data A, and FIG. 4B shows moving image data B;
FIGS. 5A and 5B are explanatory diagrams of a process up to a composition process of moving image data A and moving image data B according to an embodiment of the present invention, where FIG. 5A is a fade-out image, FIG. 5B is a fade-in image, C) shows a composite image.
FIG. 6 is an image diagram showing a schematic configuration of synthesized moving image data according to the embodiment of the present invention.
[Explanation of symbols]
10 Image editing device
12 Reading unit
14 Display section
18 Control unit
20 storage unit

Claims (7)

Selecting means for selecting first moving image data and second moving image data from predetermined moving image data;
At least one of the first moving image data and the second moving image data selected by the selection unit is converted into a still image group composed of a series of still image data having an alpha channel as transparency information representing transparency. Conversion means for converting;
When synthesizing the first moving image data and the second moving image data, at least in the combination portion of the still image group converted by the conversion means on the front side and the rear side of the predetermined combination portion. The most recent still image data is copied for a predetermined number of frames and is continuously inserted into the synthesis location as still image data to be changed in transparency, and the value of the alpha channel is set for the still image data to be changed in transparency. A synthesis means for changing the transparency by changing the composition,
An image editing apparatus comprising:   The image editing apparatus according to claim 1, wherein the composition unit changes the transparency stepwise toward the composition part when the composition is composed by changing the transparency. It further comprises a synthesis location setting means for setting a synthesis location for at least one of the first moving image data and the second video data, and the synthesis means is the synthesis location setting means. Transparency is changed by replicating the still image data nearest to the synthesized portion of the still image group converted by at least the conversion means on the front side and the rear side of the set synthetic location and continuously copying the predetermined number of frames. 2. The method according to claim 1, wherein the still image data is inserted into the synthesis portion as target still image data, and the transparency is changed by changing the alpha channel value of the still image data to be changed in transparency. The image editing apparatus according to claim 2.   The image editing apparatus according to claim 3, wherein the composition location setting means includes range setting means for setting a range of moving image data as a composition location.   The image editing apparatus according to claim 1, further comprising display means for displaying the moving image data.   The image editing apparatus according to claim 1, wherein the selection unit includes a capture unit that captures the moving image data.   The image editing according to any one of claims 1 to 6, further comprising storage means for preliminarily storing the moving image data, wherein the selection means selects the stored moving image data. apparatus.

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