JP4668051B2 - Movie generation device, movie generation method, and program - Google Patents

Description

  The present invention relates to a moving image generating apparatus, a moving image generating method, and a program. In particular, the present invention relates to a moving image generation device and a moving image generation method for generating a moving image from a still image, and a program for the moving image generation device.

In a system that generates and records moving image data from multiple still image data provided by customers, it generates moving image data in which still images are switched by adding difference data indicating still image switching to the still image data. The system which performs is known (for example, refer patent document 1). With this technology, a user can easily browse a photographic image using a home video playback device such as a DVD player or a computer terminal such as a personal computer.
JP 2003-259303 A

  However, Patent Document 1 does not disclose a specific technique for efficiently generating a moving image indicating image switching. For example, in Patent Document 1, moving image data indicating transition of a still image, such as movement, enlargement / reduction, rotation, change in color tone, fade-in / fade-out of a still image, and mosaic display for a still image, is disclosed in Patent Document 1. A specific technique for efficiently generating is not disclosed.

  Then, an object of this invention is to provide the moving image production | generation apparatus, moving image production | generation method, and program which can solve said subject. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  According to the first aspect of the present invention, there is provided a moving image generating apparatus that generates a moving image in which a plurality of still images change, and how an image in a predetermined display area in the moving image is transferred from the first still image to the second still image. Based on the transition data acquired by the transition data acquisition unit that acquires transition data indicating whether to change, and the transition data acquisition unit, a plurality of moving image composition images are generated from the first still image and the second still image, and generated A moving image generating unit that generates a moving image in which an image of a predetermined display area including the plurality of moving image composing images changes from the first still image to the second still image, and the moving image generating unit includes the first still image and the second A DCT conversion unit that performs DCT conversion on the still image and calculates DCT coefficients of a plurality of partial regions included in the first still image and the second still image; and a plurality of partial regions of the first still image A moving image composing image that generates a plurality of moving image composing images included in a moving image that changes from the first still image to the second still image, from each DCT coefficient and each DCT coefficient of the plurality of partial regions of the second still image. And a generation unit.

  The moving image composition image generation unit adds a plurality of different weights to the DCT coefficient of the partial region of the first still image and the DCT coefficient of the partial region of the second still image, and adds each of the plurality of frequency components. A moving image constituent image may be generated.

  The moving image component image generation unit generates a plurality of moving image component images in which the DCT coefficient weight of the first still image partial area gradually decreases and the DCT coefficient weight of the second still image partial area gradually increases. You can do it.

  The moving image generation unit is included in the moving image that changes from the first still image to the second still image based on the change time from the first still image to the second still image included in the transition data acquired by the transition data acquisition unit. A moving image constituent image number calculating unit that calculates the number of moving image composing images is further included, and the moving image composing image generating unit includes the first still image in each of the number of moving image composing images calculated by the moving image constituent image number calculating unit. The weight of the DCT coefficient of the partial area and the weight of the DCT coefficient of the partial area of the second still image may be calculated.

  The moving image generation unit generates a plurality of moving image configuration images from the first still image and the second still image based on the transition data acquired by the transition data acquisition unit, and includes a plurality of generated moving image configuration images. An MPEG-coded moving image is generated in which the image in the display area changes from the first still image to the second still image, and the DCT conversion unit performs DCT conversion on the first still image and the second still image, The DCT coefficients of the partial areas having the size of a plurality of macroblocks included in the still image and the second still image are calculated, and the moving image composition image generation unit calculates the DCT coefficients and the first DCT coefficients of the plurality of partial areas of the first still image. From the DCT coefficients of the plurality of partial areas of the two still images, the DCT coefficients of the macroblocks of the plurality of moving image constituent images included in the moving image that changes from the first still image to the second still image may be generated.

  Based on the transition data acquired by the transition data acquisition unit, the moving image generation unit includes a partial region of the same image content as each of the plurality of macroblocks included in a region other than the predetermined display region in one moving image constituent image. Based on the transition data acquired by the same partial area specifying unit and the transition data acquiring unit that specifies whether or not it exists in another moving image constituent image, the same partial area specifying unit has a partial area having the same image content. A motion vector calculating unit that calculates a motion vector indicating a difference in position between the determined macroblock and a partial area included in another moving image constituent image having the same image content as the macroblock; The moving picture composition image generation unit calculates the DCT coefficient of the macro block in the predetermined display area as that of the plurality of partial areas of the first still image. The motion vector calculation unit calculates a macroblock that is generated from the DCT coefficients and the DCT coefficients of the plurality of partial areas of the second still image and is determined to have partial areas with the same image content. A moving image composing image may be generated by expressing the motion vector.

  The moving image composing image generating unit generates an I picture that is a moving image composing image based on the DCT coefficient of the first still image and the DCT coefficient of the second still image calculated by the DCT converting unit, and transition data And a P picture generation unit that generates a P picture that is a moving image constituent image based on the transition data acquired by the acquisition unit and the I picture generated by the I picture generation unit, and the same partial area specifying unit acquires the transition data Based on the transition data acquired by the section, a partial area having the same image content as each of a plurality of macroblocks included in an area other than a predetermined display area in one P picture is a timing before the one P picture. The P picture generated by the I picture generated by the I picture generator or the P picture generated by the P picture generator The motion vector calculation unit determines whether or not the same partial region specifying unit determines that there is a partial region having the same image content based on the transition data acquired by the transition data acquisition unit. And a motion vector indicating a position difference between the I picture generated by the I picture generation unit having the same image content as the macroblock or the partial region included in the P picture generated by the P picture generation unit The P picture generation unit calculates a DCT coefficient of a macroblock included in a predetermined display area, a DCT coefficient of a macroblock of a first still picture, and a DCT coefficient of a macroblock of a second still picture in a plurality of P pictures. Calculate by adding several different weights and adding each frequency component, and the same partial area is assigned to each P picture. Generating a plurality of P pictures by expressing a macro block determined to have a partial region having the same image content in an I picture or P picture reproduced at the previous timing with a motion vector calculated by the motion vector calculation unit You can do it.

  The video composition image generation unit generates a B picture that is a video composition image based on the transition data acquired by the transition data acquisition unit, the I picture generated by the I picture generation unit, and the P picture generated by the P picture generation unit The same partial region specifying unit further includes a plurality of macroblocks included in a region other than the predetermined display region in one B picture based on the transition data acquired by the transition data acquiring unit. Whether or not a partial region of the same image content exists in an I picture generated by an I picture generation unit that is reproduced at a timing before or after the one B picture or a P picture generated by a P picture generation unit The motion vector calculation unit determines the transition acquired by the transition data acquisition unit. Based on the image data, the same partial area specifying unit determines that there is a partial area having the same image content, and the I picture or P picture generated by the I picture generating unit having the same image content as the macro block. A motion vector indicating a difference in position from the partial area included in the P picture generated by the part, and the B picture generation unit calculates the DCT coefficient of the macroblock included in the predetermined display area in the plurality of B pictures. The DCT coefficient of the macroblock of the first still picture and the DCT coefficient of the macroblock of the second still picture are calculated by adding a plurality of different weights for each frequency component, and the same partial area is a B picture. It is determined that a partial region having the same image content exists in an I picture or P picture that is reproduced at an earlier or later timing. The image of the macroblock, by representing the motion vector the motion vector calculation unit has calculated, may generate a plurality of B-pictures.

  According to a second aspect of the present invention, there is provided a moving image generating method for generating a moving image in which a plurality of still images change, and how an image in a predetermined display area in the moving image is transferred from the first still image to the second still image. Based on the transition data acquired in the transition data acquisition stage for acquiring transition data indicating whether to change, and the transition data acquisition stage, a plurality of moving image composition images are generated from the first still image and the second still image, A moving image generation stage that generates a moving image in which an image of a predetermined display area including a plurality of generated moving image constituent images changes from the first still image to the second still image, and the moving image generation step includes the first still image and the first A DCT conversion stage for performing DCT conversion on two still images and calculating DCT coefficients of a plurality of partial areas included in the first still image and the second still image; and a first still image Generating a plurality of moving image constituent images included in a moving image that changes from the first still image to the second still image from the DCT coefficients of the plurality of partial regions and the DCT coefficients of the plurality of partial regions of the second still image. A moving image composing image generation stage.

  According to a third aspect of the present invention, there is provided a program for a moving image generating device that generates a moving image in which a plurality of still images change. The moving image generating device is configured to change an image of a predetermined display area in a moving image from the first still image. A transition data acquisition unit that acquires transition data indicating how to transition to two still images, and a plurality of moving image configurations from the first still image and the second still image based on the transition data acquired by the transition data acquisition unit An image is generated and functions as a moving image generating unit that generates a moving image in which an image of a predetermined display area including a plurality of generated moving image constituent images changes from the first still image to the second still image. DCT transform that performs DCT transform on the first still image and the second still image, and calculates DCT coefficients of a plurality of partial areas included in the first still image and the second still image. The plurality of moving images included in the moving image that changes from the first still image to the second still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. It is made to function as a moving image composition image generation part which produces | generates a moving image composition image.

  Note that the above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the moving image production | generation apparatus which produces | generates the moving image which expresses the transition of a still image efficiently can be provided.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are inventions. It is not always essential to the solution.

  FIG. 1 shows an example of a usage environment of a moving image generating apparatus 100 according to an embodiment. The moving image generating apparatus 100 receives still images 120, 121, 122, 123,... Taken by the user 190 using the imaging device 110, and generates MPEG encoded moving image data 130 such as a slide show. At this time, the moving image generating apparatus 100 processes the still image according to the transition data in which the transition of the still image is defined, such as the motion of the still image, so that one frame to be reproduced between the still image and the still image. A plurality of moving image composing images that are images are generated. In the example of FIG. 1, the moving image generation apparatus 100 generates an I picture that is a moving image configuration image from a still image 121, and then configures a plurality of moving image configurations that configure a moving image in which the still image 122 appears gradually in the display area 144. A P picture or B picture that is an image (131, 132) is generated.

  At this time, the moving image generating apparatus 100 acquires template data in which the position and size of the display area 144 in which the still image 122 appears, and transition data in which the luminance increase speed of the still image 122 is defined. Then, the moving image generating apparatus 100 generates an I picture 133 in which the still image 122 is arranged in the display area 144 on the still image 122. Then, the moving image generating apparatus 100 calculates the weighting coefficients of the still image 121 and the still image 122 in the display area 144 on each of the moving image constituent images 131 and 132 according to the luminance increasing speed of the still image 122. Then, the moving image generating apparatus 100 determines the macroblock DCT coefficient for the image content of the still image 121 included in the display area 144 and the macroblock DCT coefficient for the image content of the still image 122 displayed in the display area 144. Are weighted for each frequency component and added to calculate the DCT coefficient of the macroblock in the display area 144 of each of the moving image constituting images 131 and 132. For this reason, the moving image generating apparatus 100 directly calculates the DCT coefficients of the moving image constituent images 131 and 132 of the moving images in which the still image 122 gradually appears in the display area 144 without generating the pixel data of the moving image constituent images 131 and 132. Thus, the DCT coefficient can be calculated.

  Further, the moving image generating apparatus 100 confirms from the template data that the image content of the macro block included outside the display area of each of the moving image constituent images 131 and 132 is the same as the image content of the macro block at the same position in the I picture. to decide. Therefore, the moving image generating apparatus 100 expresses macroblocks included outside the display area 144 of each moving image constituent image by a 0 motion vector for the I picture and 0 difference image data. In this way, the moving image generating apparatus 100 determines a macroblock whose image content does not change directly from the template data without using block matching, and expresses the macroblock by the motion vector and the difference image data. , Can generate moving images at high speed.

  Note that the moving image generating apparatus 100 may acquire an instruction from a designer who creates a moving image, a user 190, or the like as transition data. The moving image generating apparatus 100 may receive transition data or template data via a recording medium or a communication line that can be accessed by the moving image generating apparatus 100. The moving image generating apparatus 100 may provide the user 190 with a moving image recorded on an optical recording medium such as the DVD 150, or may provide the generated moving image to the user 190 through a communication line such as the Internet. Further, the moving image generating apparatus 100 may receive a still image from the imaging device 110 through a communication line such as the Internet, or may receive a still image recorded on a recording medium such as a semiconductor memory by the imaging device 110. Note that the moving image generation apparatus 100 may be a captured image or image data created using image processing software or the like other than the captured image. The moving image generating apparatus 100 may be a moving image generating terminal provided in the digital photoshop 170, or a terminal such as a personal computer provided in a private house.

  As described above, according to the moving image generating apparatus 100 of the present embodiment, it is possible to directly determine the data of the macro block having the same image content as the still image from the transition data and the template data. Therefore, the moving image generating apparatus 100 may generate image data of an image area in which the image changes, such as the display area 144 in the example of this figure. At this time, the moving image generating apparatus 100 according to the present embodiment generates an image area where the image changes from the addition of DCT coefficients. Therefore, the moving image generating apparatus 100 can generate a moving image that has been MPEG-encoded at a higher speed than the case where the MPEG encoding is performed after generating the pixel data of the entire image area of the moving image composing image.

  FIG. 2 shows an example of a block configuration of the moving image generating apparatus 100. The moving image generating apparatus 100 according to the present exemplary embodiment generates a moving image in which a plurality of still images change. The moving image generating apparatus 100 includes an instruction input unit 200, an image output unit 205, an image storage unit 210, a transition data acquisition unit 212, and a moving image generation unit 214. The moving image generating unit 214 includes a moving image constituent image number calculating unit 230, the same partial region specifying unit 240, a motion vector calculating unit 250, a moving image constituent image generating unit 280, a DCT transform unit 290, a DCT coefficient quantizing unit 292, and an encoding unit. 294. The moving picture composition image generation unit 280 includes an I picture generation unit 282, a P picture generation unit 284, and a B picture generation unit 286.

  The image storage unit 210 stores a plurality of still images. The transition data acquisition unit 212 acquires transition data indicating how an image of a predetermined display area in a moving image is changed from the first still image to the second still image. The moving image generation unit 214 generates a plurality of moving image configuration images from the first still image and the second still image based on the transition data acquired by the transition data acquisition unit 212, and includes the generated plurality of moving image configuration images. A moving image is generated in which an image in a predetermined display area changes from the first still image to the second still image.

  Specifically, the DCT conversion unit 290 performs DCT conversion on the first still image and the second still image, and calculates DCT coefficients of a plurality of partial regions included in the first still image and the second still image. The moving image composition image generation unit 280 changes from the first still image to the second still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. A plurality of moving image constituent images included in the moving moving image are generated.

  Specifically, the moving image composition image generation unit 280 adds the DCT coefficient of the partial region of the first still image and the DCT coefficient of the partial region of the second still image to each frequency component by applying a plurality of different weights. By doing so, a plurality of moving image composing images are generated. For example, the moving image configuration image generation unit 280 has a plurality of moving image configurations in which the weight of the DCT coefficient of the partial region of the first still image is gradually decreased and the weight of the DCT coefficient of the partial region of the second still image is gradually increased. An image may be generated. Thereby, the moving image generating apparatus 100 directly calculates the DCT coefficient of the moving image constituting image that forms the moving image in which the second still image gradually appears from the addition of the DCT coefficients of the first still image and the second still image. be able to.

  The moving image constituent image number calculation unit 230 changes from the first still image to the second still image based on the change time from the first still image to the second still image included in the transition data acquired by the transition data acquisition unit 212. The number of a plurality of moving image constituent images included in the moving moving image is calculated. For example, the moving image constituent image number calculation unit 230 calculates the number of moving image constituent images from the change time from the first still image to the second still image and the number of moving image constituent images to be reproduced per unit time. Then, the moving image constituent image generation unit 280 weights the DCT coefficient of the partial region of the first still image and the DCT of the partial region of the second still image in each of the moving image constituent images of the number calculated by the moving image constituent image number calculating unit 230. Calculate coefficient weights.

  When the moving image generating apparatus 100 generates an MPEG encoded moving image, the moving image generating unit 214 uses the first still image and the second still image based on the transition data acquired by the transition data acquiring unit 212. A plurality of moving image constituent images are generated, and an MPEG encoded moving image in which an image in a predetermined display area including the generated plurality of moving image constituent images is changed from the first still image to the second still image is generated. Then, the DCT conversion unit 290 performs DCT conversion on the first still image and the second still image, and calculates DCT coefficients of partial areas having a size of a plurality of macroblocks included in the first still image and the second still image. calculate. Then, the moving image composition image generation unit 280 uses the first still image to the second still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. DCT coefficients of macroblocks of a plurality of moving image constituent images included in a moving image that changes to a picture are generated.

  Based on the transition data acquired by the transition data acquiring unit 212, the same partial area specifying unit 240 has the same image content as each of a plurality of macroblocks included in an area other than the predetermined display area in one moving image constituent image. It is specified whether or not the partial area exists in another moving image constituent image. Then, the motion vector calculation unit 250, based on the transition data acquired by the transition data acquisition unit 212, the macro block determined by the same partial region specification unit 240 that there is a partial region having the same image content, the macro block, A motion vector indicating a position difference from a partial area included in another moving image constituent image having the same image content is calculated.

  Then, the moving image composition image generation unit 280 calculates the DCT coefficients of the macroblocks in the predetermined display area, the DCT coefficients of the plurality of partial areas of the first still image, and the DCT coefficients of the plurality of partial areas of the second still image. A macro block that is generated from the coefficients and is determined to have a partial area having the same image content in the same partial area is represented by a motion vector calculated by the motion vector calculation unit 250 to generate a moving image constituent image. As described above, the moving image generating apparatus 100 identifies an area having no change other than the display area from the transition data. Therefore, the moving image generating apparatus 100 sets the motion vector in the MPEG encoding to 0 and the difference image signal to 0 for the image content of the macroblock determined to be included in the unchanged region without performing processing such as block matching. Can be expressed as

  The I picture generation unit 282 generates an I picture that is a moving image constituent image based on the DCT coefficient of the first still image and the DCT coefficient of the second still image calculated by the DCT conversion unit 290. For example, the I picture generation unit 282 calculates the DCT coefficient of the macro block of the I picture by applying the calculated DCT coefficient for each macro block to the image frame indicated by the template data.

  In addition, the P picture generation unit 284 generates a P picture that is a moving image constituent image based on the transition data acquired by the transition data acquisition unit 212 and the I picture generated by the I picture generation unit 282. In addition, the B picture generation unit 286 is a moving image constituent image based on the transition data acquired by the transition data acquisition unit 212, the I picture generated by the I picture generation unit 282, and the P picture generated by the P picture generation unit 284. A B picture is generated.

  Regarding the generation of the P picture, the same partial area specifying unit 240, based on the transition data acquired by the transition data acquiring unit 212, each of a plurality of macroblocks included in an area other than the predetermined display area in one P picture. Whether or not a partial region having the same image content exists in the I picture generated by the I picture generating unit 282 or the P picture generated by the P picture generating unit 284 that is played back at a timing before the one P picture Is identified.

  Then, the motion vector calculation unit 250, based on the transition data acquired by the transition data acquisition unit 212, the macro block determined by the same partial region specification unit 240 that there is a partial region having the same image content, the macro block, A motion vector indicating a position difference between the I picture generated by the I picture generating unit 282 or the partial area included in the P picture generated by the P picture generating unit 284 having the same image content is calculated. The P picture generation unit 284 calculates a DCT coefficient of a macroblock included in a predetermined display area, a DCT coefficient of a macroblock of a first still picture, and a DCT coefficient of a macroblock of a second still picture in a plurality of P pictures. When a plurality of different weights are added and added for each frequency component, and the same partial area is reproduced at a timing before each P picture, there is a partial area having the same image content in the I picture or P picture. A plurality of P pictures are generated by expressing the determined macroblock with the motion vector calculated by the motion vector calculation unit 250.

  In addition, regarding the generation of a B picture, the same partial area specifying unit 240, based on the transition data acquired by the transition data acquiring unit 212, includes a plurality of macroblocks included in an area other than the predetermined display area in one B picture. A partial region of the same image content as each of the above is present in the I picture generated by the I picture generating unit 282 or the P picture generated by the P picture generating unit 284 that is played back at a timing before or after the one B picture Specify whether or not to do so.

  Then, the motion vector calculation unit 250, based on the transition data acquired by the transition data acquisition unit 212, the macro block determined by the same partial region specification unit 240 that there is a partial region having the same image content, the macro block, A motion vector indicating a position difference between the I picture generated by the I picture generating unit 282 or the partial area included in the P picture generated by the P picture generating unit 284 having the same image content is calculated. Then, the B picture generation unit 286 calculates the DCT coefficients of the macroblocks included in the predetermined display area in the plurality of B pictures, as the DCT coefficients of the macroblocks of the first still picture and the macroblocks of the second still picture. Is calculated by adding a plurality of different weights for each frequency component, and the same partial area is the partial area of the same image content as the I picture or P picture reproduced at the timing before or after each B picture A plurality of B pictures are generated by expressing an image of a macroblock determined to be present with a motion vector calculated by the motion vector calculation unit 250.

  Further, the DCT coefficient quantization unit 292 performs quantization on the DCT coefficients included in the I picture, P picture, and B picture generated by the moving picture composition image generation unit 280, thereby compressing the I picture with the data amount compressed, A P picture and a B picture are generated. The encoding unit 294 generates a moving image in which the data amount is compressed by performing encoding on the moving image including the I picture, the P picture, and the B picture generated by the DCT coefficient quantization unit 292. Specifically, the encoding unit 294 may perform run length encoding and Huffman encoding on a moving image including an I picture, a P picture, and a B picture. The image output unit 205 outputs the moving image generated by the encoding unit 294 to the outside of the moving image generating apparatus 100. For example, the image output unit 205 outputs a moving image to a recording medium such as a DVD 150.

  As described above, according to the moving image generating apparatus 100 in the present embodiment, the DCT coefficients of the macroblocks in the changing area are calculated by averaging the DCT coefficients included in the I picture. In addition, when generating the P picture and the B picture, the moving image generating apparatus 100, for each of the macroblocks in the region in which the image content does not change from the I picture or the P picture reproduced at the previous or previous timing, The motion vector can be directly calculated from the transition data. For this reason, the moving image generating apparatus 100 can generate a moving image that has been MPEG-compressed more efficiently than the case where MPEG encoding is performed after generating pixel data of the entire image area. Note that the still image in the present embodiment may be an image constituting an animation or a partial image in one image constituting an animation, such as an image of an object included in the animation. Then, the moving image generating apparatus 100 may generate an animation from the plurality of still images. Even in this case, it goes without saying that the moving image generating apparatus 100 can generate the animation at a higher speed than the case where the MPEG encoding is performed after generating the pixel data of the image constituting the animation.

  FIG. 3 shows an example of a moving image constituent image generated by the moving image generating apparatus 100. In the example of this figure, the moving image generating unit 214 generates a moving image indicating a still image switching. In the example of the transition of the still image in the example of this figure, after the still image 300 is displayed in the image frame 350 which is the still image display area, the image of the still image 300 gradually disappears and once disappears. (For example, moving image composition image 315), a moving image in which a still image 301 appears gradually is generated.

  The image frame 350 is designated by the template selection by the user 190, and is acquired by the moving image generating apparatus 100 as template data. Further, the still image 300 and the still image 301 to be displayed in the image frame 350 are selected by the user 190, and the fact that the still image 300 is switched to the still image 301 is input to the moving image generating apparatus 100, and the transition data As a transition data acquisition unit 212. In addition, the moving image generating apparatus 100 receives the time until the still image 300 is switched to the still image 301 as transition data from the user 190. Note that the moving image constituent image number calculation unit 230 determines the moving image between the moving image constituent image 310 and the moving image constituent image 320 based on the time until the still image 300 is switched to the still image 301 and the display interval between successive moving image constituent images. The number n of the constituent images is calculated.

  In the example of this figure, the moving image generating unit 214 generates moving image composing images 310 and 320 generated from the still images 300 and 301 as I pictures. In other words, the moving image generation unit 214 sets the weighting coefficients of the still images 300 and 301 in the moving image composition image 310 to 1 and 0, respectively, and the DCT coefficient of each macroblock calculated for the still image 300 represents the moving image composition image 310. This is the DCT coefficient for each macroblock in the image frame 350. Conversely, the weighting coefficients of the still images 300 and 301 in the moving image composition image 320 are 0 and 1, respectively, and the DCT coefficient of each macroblock calculated for the still image 301 is within the image frame 350 of the moving image composition image 320. This is the DCT coefficient for each macroblock.

  Then, in the moving image composition image (for example, the moving image composition image 311) displayed between the moving image composition image 310 and the moving image composition image 315, the moving image composition image generation unit 280 sets a weighting coefficient for the DCT coefficient of the still image 301. The weighting coefficient for the DCT coefficient of the still image 300 is decreased to 0 over the moving image constituent image 315 while maintaining 0. The P picture generation unit 284 or the B picture generation unit 286 then multiplies the DCT coefficient of each macroblock of the still image 300 by each weighting ratio, and the DCT coefficient for a moving image constituent image that is a P picture or B picture Calculate as Thereby, the moving image generation unit 214 can generate a moving image in which the still image 300 gradually disappears toward the moving image constituent image 315.

  Conversely, the moving image generation unit 214 displays a moving image displayed between the moving image configuration image 315 and the moving image configuration image 320 in order to express a moving image in which the still image 301 gradually appears from the moving image configuration image 315 to the moving image configuration image 320. In the component image (for example, the moving image component image 317), the weighting coefficient for the DCT coefficient of the still image 301 is increased to 1 over the moving image component image 320 while the weighting ratio for the DCT coefficient of the still image 300 is set to zero. Then, the P picture generation unit 284 or the B picture generation unit 286 uses a value obtained by multiplying the DCT coefficient of each macroblock of the still image 301 by each weighting coefficient as a DCT coefficient for a moving picture constituent image that is a P picture or a B picture. calculate. Accordingly, the moving image generation unit 214 can generate a moving image in which the still image 301 gradually appears from the moving image constituent image 315.

  Further, in another example showing the switching of images in the figure, the moving image generation unit 214 is a moving image whose display is switched from the still image 300 to the still image 301, and the still image 300 gradually disappears as the still image 300 gradually disappears. The moving image 301 appears gradually. Also in this example, the moving image generating unit 214 generates moving image composing images 310 and 320 generated from the still images 300 and 301 as I pictures. And about the moving image structure image reproduced | regenerated between the moving image structure image 310 and the moving image structure image 320, while making the weighting coefficient of the DCT coefficient of the still image 300 smaller in the moving image structure image displayed at a later timing, The weighting coefficient for the DCT coefficient of the still image 301 is increased. Then, the P picture generation unit 284 or the B picture generation unit 286 uses a value obtained by multiplying the DCT coefficient of each macroblock of the still image 301 by each weighting coefficient as the DCT coefficient in the P picture or B picture. In this way, the moving image generating unit 214 can generate a moving image in which the still image 301 gradually appears while the still image 300 gradually disappears.

  Note that the moving image generation unit 214 may set the change amount of the weighting coefficient to be smaller as the number n of moving image configuration images calculated by the moving image configuration image number calculation unit 230 is larger. For example, the moving image composition image generation unit 280 decreases the weighting coefficient for the still image 300 by 1 / (n + 1) with respect to the weighting coefficient in the immediately preceding moving image composition image. In addition, the moving image constituent image generation unit 280 increases the weighting coefficient for the still image 301 by 1 / (n + 1) with respect to the weighting coefficient in the immediately preceding moving image constituent image. Thereby, the moving image generating apparatus 100 can generate a moving image in which the still image 300 is switched to the still image 301 at a constant switching speed.

  As described above, since the moving image generating apparatus 100 directly calculates the DCT coefficient of each moving image constituent image by weighting the DCT coefficient of the still image, the pixel data of each moving image forming image is once generated and then MPEG encoded. It is possible to reduce the generation time of the moving image as compared with the case where it performs. In this figure, for the sake of simplicity, the case where an I picture is generated from one still image has been described, but it goes without saying that an image obtained by combining a plurality of still images may be generated as an I picture. Yes. At this time, for example, the transition data acquisition unit 212 may acquire transition data indicating a region where a plurality of still images are combined.

  FIG. 4 shows an example of a generation method for generating a moving image in which a still image changes by adding DCT coefficients. In the example of this figure, the moving image generation unit 214 generates a moving image in which the still image 301 described in FIG. 3 appears in a part of the display area 451 from the state in which the still image 300 described in FIG. 3 is displayed. . In the example of this figure, the moving image generating apparatus 100 calculates the DCT coefficient of the image content included in the position of the display area 451 by adding the DCT coefficients calculated for the still image 300 and the still image 301.

  In the example of this figure, an object indicating the sun including moving on the image is included in the moving image, but a method of generating the image contents of the macroblock including the moving object will be described with reference to FIG. .

  When generating the moving image composition images 410 and 420 (I picture), the DCT conversion unit 290 calculates DCT coefficients by performing DCT conversion on the pixel data included in each macroblock of each moving image composition image. The DCT conversion unit 290 calculates a DCT coefficient for each block of luminance signals of four blocks each having eight pixels in both the vertical and horizontal directions for a macroblock (for example, the macroblock 460) of 16 pixels in the vertical and horizontal directions in the moving image composition image 410. Also, the DCT conversion unit 290 calculates, as the DCT coefficients of the blocks for 8 pixels in the vertical and horizontal directions, for each of the color difference signals of Cr and Cb in each macroblock. In addition, regarding the macro block 470 included in the display area 451 of the moving image constituent image 420 (I picture) and located at the same position as the macro block 460, the luminance of the four blocks is generated in the generation process of the moving image constituent image 420 (I picture). DCT coefficients are calculated for each block indicating the signal and the color difference signals of Cr and Cb.

  The calculation method of the DCT coefficient of the macro block 465 in the display area 451 of the moving image constituent image 413 will be specifically described as an example. The DCT coefficient of the macro block 460 and the DCT coefficient of the macro block 470 are calculated for each frequency component. The DCT coefficients for the luminance signal and the color difference signals Cr and Cb of the macro block 465 are calculated by weighted averaging. Needless to say, the averaging of the DCT coefficient in each block of the luminance signal is the averaging of the DCT coefficient of the luminance signal with the block indicating the same position. Needless to say, for the Cr signal and the Cb signal, the DCT coefficients are averaged between the macroblocks indicating the same position. In the example of this figure, the DC component I401 of one block in the luminance signal of the macroblock 460, the DC component I402 of one block in the luminance signal of the macroblock 470, and the weighting coefficients α and β respectively are used. An example in which the DC component (α × I401 + β × I402) of one block in the luminance signal of the block 465 is calculated is illustrated. The weighting coefficients α and β may be weighting coefficients calculated by the method described with reference to FIG.

  As described above, the moving image generating apparatus 100 can directly calculate the DCT coefficient of the image content of the macro block in the display area 470 by averaging the DCT coefficients of the still image calculated in advance. Therefore, the moving image generating apparatus 100 can generate an MPEG-encoded moving image at a higher speed than the case where the pixel data of each moving image constituent image is once generated and then subjected to MPEG encoding.

  FIG. 5 shows a generation example of a moving image including movement of an object in an image. In the example of this figure, the moving image generating apparatus 100 generates moving image data including movement of an object indicating the sun with the still image 300 as a background. The transition data acquisition unit 212 acquires the difference in coordinates of the object indicating the sun (vector ΔTV 501, 502, 503, 504) between the moving image constituent images that are continuously played back as transition data. The transition data also includes the initial position of the object, and the moving image generation unit 214 generates a moving image composition image 531 by superimposing the object image on the initial position of the object indicated by the transition data of the still image 300. At this time, the moving image generating apparatus 100 generates the moving image composing image 531 as an I picture.

  Here, the generation method of the P or B picture will be described by taking the generation method of the moving image constituent image 534 (P picture) as an example. The same partial area specifying unit 240 converts each vector ΔTV indicated by the transition data into a moving image. By sequentially adding from the component image 531 (I picture), an object movement vector V514 indicating a difference in the position of the object from the moving image component image is calculated. In the example of this figure, the object movement vector TV514 can be expressed by ΔTV501 + ΔTV502 + ΔTV503. In addition, the transition data acquisition unit 212 may acquire time-dependent data on the speed of the object, or may calculate an object movement vector in which the object has moved by temporal integration from the I picture.

  Further, from the position of the object in the moving image constituent image 334 (P picture), the outline information of the object, and the position of the macroblock, a macroblock including the outline of the object (for example, macroblocks 571, 572, 573 in the region 580, and 574) is identified. In the example of this figure, for example, in the area 580, the image contents of the macroblocks 561, 562, and 563 in which the entire area is included in the object are portions in the previous I picture indicated by the reverse vector of the object movement vector TV514. The image content is the same as the areas 551, 552, and 553.

  The entire area of the macroblocks 571, 572, 573, and 574 including the outline of the object that exist outside the object (for example, the macroblock 581) is included in the background. The image contents of a macroblock whose background is entirely included in the background is the image contents (background) of the I picture in the range of the macroblock unless an object moving within the range of the macroblock in the I picture is included. The same image). Therefore, the image content of the macroblock whose entire area is included in the background can be expressed with 0 as the motion vector and 0 as the difference image signal.

  In addition, the moving image generation unit 214 may generate a macro block (for example, the macro block 572) including the outline of the object by synthesizing the background image and the image of the object. For example, the moving image generation unit 214 includes the image of the object in the region 591 including the object in the macro block 572 (for example, the portion of the image 541 in the moving image composition image 531) and the image in the range indicated by the macro block 572 in the moving image composition image 531. The image of the macro block 572 can be generated by combining the image of the area 542 other than the object area 591 in the content.

  In addition, the moving image generation unit 214 may express the image content of the macroblock 572 using a difference image and a motion vector. For example, the moving image generation unit 214 calculates the area of the object region 591, and the moving image configuration is calculated when the ratio of the area of the region 591 to the area of the macroblock is larger than a predetermined value (for example, 0.5). A difference image signal with respect to the partial region 554 of the image 531 (I picture) may be generated, and the image content of the macroblock 572 may be expressed by an object movement vector between the generated difference image signal and the macroblock. In addition, when the ratio of the area of the region 591 to the area of the macroblock is equal to or less than a predetermined value (for example, 0.5), the moving image generation unit 214 moves the moving image constituent image 531 (at the position of the macroblock 572). A difference image signal with respect to a partial region 555 of (I picture) is generated, and the image content of the macroblock 572 can be expressed by the generated difference image signal and a motion vector of 0. As described above, the moving image generating apparatus 100 can easily specify a similar partial region based on the transition data without performing block matching.

  Note that the image content of the macroblock 572 including the boundary line can be generated by averaging the frequency components of the DCT coefficients in the vicinity of the boundary line in addition to the method of generating the image from the image synthesis as described above. For example, the moving image generation unit 214 performs weighted averaging of the DCT coefficients calculated for each of the macroblocks 554 and 555 for each frequency component, thereby obtaining the DCT coefficients of the luminance signal of the macroblock 572 and the color difference signals Cr and Cb. May be calculated. The averaging of DCT coefficients in the macroblock can be obtained by the same process as the averaging process described with reference to FIG.

  As described above, the moving image generating apparatus 100 can directly calculate the DCT coefficient of the image content of the macro block including the boundary portion by averaging the DCT coefficients calculated in advance. Therefore, the moving image generating apparatus 100 can generate the DCT coefficient of the image content of the macroblock including the boundary portion at a higher speed than when performing the DCT conversion from the pixel data. Note that the image obtained by averaging the DCT coefficients is an image in which the background and the object are overlapped. For example, in the image in which the object moves in the background image, the boundary portion between the object and the background is accurately expressed. It will not be a rendered image. However, since the background image and the object image remain as afterimages around the moving object, the moving object looks blurred to the eyes of the moving image viewer. For this reason, even if the image of the macroblock including the outline of the object becomes an image in which the background and the object are superimposed, the viewer can browse the moving image without feeling uncomfortable.

  As described above, the moving image generating apparatus 100 can easily specify images having the same image content by adding the movement information of the object indicated by the transition data. For this reason, it is possible to generate an MPEG-compressed moving image at a higher speed than when generating pixel data of a moving image constituent image once. In particular, since a process corresponding to block matching or the like for calculating a motion vector can be realized by adding object movement information, the motion vector can be calculated at a higher speed. The movement of the object indicated by the transition data is the difference between the position of the object in the reference moving image constituent image (for example, I picture or P picture) and the position of the object in another moving image constituent image (B picture, P picture). However, it is desirable that the value be a minimum unit of 1/2 pixel. In this case, in the macroblock in which the entire image area is included in the object, the motion vector is the same as the object movement vector and can be expressed by a difference image signal of 0, so that the moving image is compressed at a higher compression rate. And a moving image can be generated at a higher speed.

  FIG. 6 shows an example of the hardware configuration of the moving image generating apparatus 100. The moving image generating apparatus 100 includes a CPU peripheral portion including a CPU 1505, a RAM 1520, a graphic controller 1575, and a display device 1580 connected to each other by a host controller 1582, and communication connected to the host controller 1582 by an input / output controller 1584. An input / output unit having an interface 1530, a hard disk drive 1540, and a CD-ROM drive 1560, and a legacy input / output unit having a ROM 1510, a flexible disk drive 1550, and an input / output chip 1570 connected to the input / output controller 1584. .

  The host controller 1582 connects the RAM 1520, the CPU 1505 that accesses the RAM 1520 at a high transfer rate, and the graphic controller 1575. The CPU 1505 operates based on programs stored in the ROM 1510 and the RAM 1520 and controls each unit. The graphic controller 1575 acquires image data generated by the CPU 1505 and the like on a frame buffer provided in the RAM 1520 and displays the image data on the display device 1580. Alternatively, the graphic controller 1575 may include a frame buffer that stores image data generated by the CPU 1505 or the like.

  The input / output controller 1584 connects the host controller 1582 to the hard disk drive 1540, the communication interface 1530, and the CD-ROM drive 1560, which are relatively high-speed input / output devices. The hard disk drive 1540 stores programs and data used by the CPU 1505. The communication interface 1530 is connected to the network communication device 1598 to transmit / receive programs or data. The CD-ROM drive 1560 reads a program or data from the CD-ROM 1595 and provides it to the hard disk drive 1540 and the communication interface 1530 via the RAM 1520.

  The input / output controller 1584 is connected to the ROM 1510, the flexible disk drive 1550, and the relatively low-speed input / output device of the input / output chip 1570. The ROM 1510 stores a boot program that the moving image generating apparatus 100 executes at startup, a program that depends on the hardware of the moving image generating apparatus 100, and the like. The flexible disk drive 1550 reads a program or data from the flexible disk 1590 and provides it to the hard disk drive 1540 and the communication interface 1530 via the RAM 1520. The input / output chip 1570 connects various input / output devices via a flexible disk drive 1550 and, for example, a parallel port, a serial port, a keyboard port, a mouse port, and the like.

  A program executed by the CPU 1505 is stored in a recording medium such as the flexible disk 1590, the CD-ROM 1595, or an IC card and provided by the user. The program stored in the recording medium may be compressed or uncompressed. The program is installed in the hard disk drive 1540 from the recording medium, read into the RAM 1520, and executed by the CPU 1505.

  The program executed by the CPU 1505 makes the moving image generating apparatus 100 the instruction input unit 200, the image output unit 205, the image storage unit 210, the transition data acquisition unit 212, and the moving image generation unit 214 described with reference to FIGS. Make it work. The program also includes the moving image generation unit 214, the moving image configuration image number calculation unit 230, the same partial region specification unit 240, the motion vector calculation unit 250, the moving image configuration image generation unit 280, the DCT conversion unit 290, and the DCT coefficient quantization unit. 292 and the encoding unit 294. In addition, the program causes the moving picture composition image generation unit 280 to function as an I picture generation unit 282, a P picture generation unit 284, and a B picture generation unit 286.

  The program shown above may be stored in an external storage medium. As the storage medium, in addition to the flexible disk 1590 and the CD-ROM 1595, an optical recording medium such as a DVD or PD, a magneto-optical recording medium such as an MD, a tape medium, a semiconductor memory such as an IC card, or the like can be used. Further, a storage device such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium, and the program may be provided to the moving image generation device 100 via the network.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

2 is a diagram illustrating an example of a usage environment of a moving image generating apparatus 100. FIG. 2 is a diagram illustrating an example of a block configuration of a moving image generating apparatus 100. FIG. It is a figure which shows an example of the moving image structure image produced | generated by the moving image production | generation apparatus 100. FIG. It is a figure which shows an example of the moving image production | generation method by the addition of a DCT coefficient. It is a figure which shows the example of a production | generation of the moving image containing the movement of the object in an image. 2 is a diagram illustrating an example of a hardware configuration of a moving image generating apparatus 100. FIG.

Explanation of symbols

100 moving image generating device 110 imaging device 130 moving image data 150 DVD
170 Digital Photoshop 190 User 200 Instruction Input Unit 205 Image Output Unit 210 Image Storage Unit 212 Transition Data Acquisition Unit 214 Movie Generation Unit 230 Movie Configuration Image Number Calculation Unit 240 Same Partial Region Specification Unit 250 Motion Vector Calculation Unit 280 Movie Configuration Image Generation Unit 282 I picture generation unit 284 P picture generation unit 286 B picture generation unit 290 DCT transform unit 292 DCT coefficient quantization unit 294 encoding unit

Claims (10)

A moving image generating apparatus that generates a moving image in which a plurality of still images change,
A transition data acquisition unit for acquiring transition data indicating how to change the image of a predetermined display area in the moving image from the first still image to the second still image;
A predetermined display area including a plurality of moving image constituent images generated by generating a plurality of moving image constituent images from the first still image and the second still image based on the transition data acquired by the transition data acquiring unit A moving image generating unit that generates a moving image in which the image of the first image is changed from the first still image to the second still image,
The moving image generation unit
A DCT conversion unit that performs DCT conversion on the first still image and the second still image, and calculates DCT coefficients of a plurality of partial regions included in the first still image and the second still image;
Included in the moving image that transitions from the first still image to the second still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. A moving image generating apparatus including a moving image forming image generating unit that generates a plurality of moving image forming images. The moving image composing image generation unit adds the DCT coefficient of the partial region of the first still image and the DCT coefficient of the partial region of the second still image to each frequency component with a plurality of different weightings. The moving image generating apparatus according to claim 1, wherein a plurality of moving image composing images are generated. The moving image configuration image generation unit has a plurality of moving image configurations in which the weight of the DCT coefficient of the partial region of the first still image is gradually decreased and the weight of the DCT coefficient of the partial region of the second still image is gradually increased. The moving image generating apparatus according to claim 2, which generates an image. The moving image generation unit
Included in the moving image transitioned from the first still image to the second still image based on the change time from the first still image to the second still image included in the transition data acquired by the transition data acquisition unit A moving image composition image number calculating unit for calculating the number of the plurality of moving image composition images;
The moving image constituent image generation unit includes a weight of a DCT coefficient of the partial region of the first still image and a DCT of the partial region of the second still image in each of the number of moving image constituent images calculated by the moving image constituent image number calculating unit. The moving image generating apparatus according to claim 3, wherein the weight of the coefficient is calculated. The moving image generation unit generates a plurality of moving image configuration images from the first still image and the second still image based on the transition data acquired by the transition data acquisition unit, and generates the generated plurality of moving image configuration images. Including an MPEG encoded moving image in which an image of a predetermined display area is changed from the first still image to the second still image;
The DCT conversion unit performs DCT conversion on the first still image and the second still image, and performs DCT on a partial region having a size of a plurality of macroblocks included in the first still image and the second still image. Calculate the coefficient,
The moving image composing image generating unit generates the first still image from the first still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. The moving image generating apparatus according to claim 1, wherein the moving image generating device generates DCT coefficients of macroblocks of a plurality of moving image constituent images included in a moving image that changes to two still images. The moving image generation unit
Based on the transition data acquired by the transition data acquisition unit, a partial area having the same image content as each of a plurality of macroblocks included in an area other than the predetermined display area in one moving image constituent image is another moving image. The same partial region specifying unit for specifying whether or not the component image exists,
Based on the transition data acquired by the transition data acquisition unit, the macro block determined by the same partial region specifying unit to have a partial region having the same image content, and another moving image having the same image content as the macro block A motion vector calculation unit that calculates a motion vector indicating a difference in position between the partial areas included in the constituent images;
The moving image composing image generating unit calculates a DCT coefficient of a macroblock of the predetermined display area, a DCT coefficient of each of a plurality of partial areas of the first still image, and each of a plurality of partial areas of the second still image. A moving image composing image is generated by expressing a macro block that is generated from a DCT coefficient and that is determined to include a partial region having the same image content in the same partial region by a motion vector calculated by the motion vector calculation unit. Item 6. The moving image generating device according to Item 5. The moving image composition image generation unit
An I picture generation unit that generates an I picture that is a moving image constituent image based on the DCT coefficient of the first still image and the DCT coefficient of the second still image calculated by the DCT conversion unit;
A P picture generation unit that generates a P picture, which is a moving image constituent image, based on the transition data acquired by the transition data acquisition unit and the I picture generated by the I picture generation unit;
Further including
The same partial area specifying unit has the same image content as each of a plurality of macroblocks included in an area other than the predetermined display area in one P picture based on the transition data acquired by the transition data acquisition unit. Specify whether or not the partial area exists in the I picture generated by the I picture generation unit that is reproduced at a timing before the one P picture or the P picture generated by the P picture generation unit,
The motion vector calculation unit, based on the transition data acquired by the transition data acquisition unit, the macroblock that the same partial region specification unit has determined that there is a partial region of the same image content, and the same macroblock Calculating a motion vector indicating a position difference between an I picture generated by the I picture generating unit which is an image content or a partial region included in the P picture generated by the P picture generating unit;
The P picture generation unit may include, in a plurality of P pictures, a DCT coefficient of a macroblock included in the predetermined display area, a DCT coefficient of a macroblock of the first still picture, and a DCT of a macroblock of the second still picture. A portion having the same image content as the I picture or P picture in which the same partial area is reproduced at a timing before each P picture is calculated by adding a coefficient to each frequency component with a plurality of different weightings. The moving image generating apparatus according to claim 6, wherein a plurality of P pictures are generated by expressing a macroblock determined to have an area with a motion vector calculated by the motion vector calculation unit. The moving image composition image generation unit
B picture generation for generating a B picture that is a moving picture constituent image based on the transition data acquired by the transition data acquisition unit, the I picture generated by the I picture generation unit, and the P picture generated by the P picture generation unit Further comprising
The same partial area specifying unit has the same image content as each of a plurality of macroblocks included in an area other than the predetermined display area in one B picture based on the transition data acquired by the transition data acquisition unit. Specify whether or not the partial area exists in the I picture generated by the I picture generation unit or the P picture generated by the P picture generation unit that is reproduced at a timing before or after the one B picture,
The motion vector calculation unit, based on the transition data acquired by the transition data acquisition unit, the macroblock that the same partial region specification unit has determined that there is a partial region of the same image content, and the same macroblock Calculating a motion vector indicating a position difference between an I picture generated by the I picture generating unit which is an image content or a partial region included in the P picture generated by the P picture generating unit;
The B picture generation unit calculates a DCT coefficient of a macroblock included in the predetermined display area in a plurality of B pictures, a DCT coefficient of a macroblock of the first still picture, and a DCT coefficient of a macroblock of the second still picture Is calculated by adding a plurality of different weights for each frequency component, and the same partial area has the same image content as the I picture or P picture reproduced at the timing before or after each B picture. The moving image generation apparatus according to claim 7, further comprising: generating a plurality of B pictures by expressing an image of a macroblock determined to have a partial region with a motion vector calculated by the motion vector calculation unit. A video generation method for generating a video in which a plurality of still images change,
A transition data acquisition stage for acquiring transition data indicating how to change the image of the predetermined display area in the moving image from the first still image to the second still image;
Based on the transition data acquired in the transition data acquisition step, a plurality of moving image constituent images are generated from the first still image and the second still image, and a predetermined display including the generated moving image constituent images A moving image generating step of generating a moving image in which an image of the region changes from the first still image to the second still image;
The video generation stage includes
A DCT conversion step of performing DCT conversion on the first still image and the second still image to calculate DCT coefficients of a plurality of partial regions included in the first still image and the second still image;
Included in the moving image that transitions from the first still image to the second still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. A moving image generating method comprising: a moving image forming image generating step for generating a plurality of moving image forming images. A program for a moving image generating device for generating a moving image in which a plurality of still images change, wherein the moving image generating device is
A transition data acquisition unit for acquiring transition data indicating how the image of the predetermined display area in the moving image is changed from the first still image to the second still image;
A predetermined display area including a plurality of moving image constituent images generated by generating a plurality of moving image constituent images from the first still image and the second still image based on the transition data acquired by the transition data acquiring unit Function as a moving image generation unit that generates a moving image in which the image of the first image is changed from the first still image to the second still image,
The moving image generation unit
A DCT conversion unit that performs DCT conversion on the first still image and the second still image, and calculates DCT coefficients of a plurality of partial regions included in the first still image and the second still image;
Included in the moving image that transitions from the first still image to the second still image from the DCT coefficients of the plurality of partial regions of the first still image and the DCT coefficients of the plurality of partial regions of the second still image. A program that functions as a moving image composition image generation unit that generates a plurality of moving image composition images.

Images