KR20060015210A - An apparatus and a method for converting animated image, and a recording medium on which a computer program performing thereof is recorded - Google Patents

Abstract

According to the present invention, in order to automatically convert a PC-based moving picture into a format suitable for a mobile communication terminal, the moving picture which is the original is extracted for each frame, and for each of the frames, an area different from each other by at least a predetermined frame among the areas of the frame. Is extracted as a dynamic object region, and the similarity between the extracted dynamic object regions is compared, and if it is more than a predetermined similarity, objectization is given to the layer, and a key frame is extracted for each event of the moving image, and the extracted key frame is extracted. A system, method for reconstructing a frame of a moving picture, and a recording medium having recorded thereon a computer program are disclosed.

Anime, mobile communication, avatar

Description

An apparatus and a method for converting animated image, and a recording medium on which a computer program performing approximately is recorded}

1 is a block diagram conceptually illustrating an example in which a moving image file format conversion system 100 according to a preferred embodiment of the present invention is used.

2 is a block diagram conceptually showing the configuration of a moving image file format conversion system 10 according to a preferred embodiment of the present invention.

3 is a diagram for explaining a process of AOPizing each frame image.

4 is a diagram for explaining a process of extracting a key frame;

5A and 5B are diagrams for explaining AOP interpolation.

FIG. 6 is a diagram for explaining processing of resizing the original moving image by the image resizing module 110; FIG.

7 is a flowchart conceptually illustrating a process of converting an original moving image according to a preferred embodiment of the present invention.

8 is a block diagram conceptually showing a recording medium 300 and a computer system 350 in which a computer program for converting an original moving picture is recorded according to a preferred embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10 Video conversion system 100 video image file format conversion system

34 mobile communication terminal 102 frame extraction module

104 Frame Preprocessing Module 106 Dynamic Object Area Extraction Module

108 Objectization Module 110 Image Sizing Module

112 Color Adjustment Module 114 Key Frame Extraction Module

116 Frame Reconstruction Module 118 File Conversion Module

120 Transmission Format Conversion Module 300 Recording Media

350 computer systems

The present invention relates to a moving image file format conversion system and method thereof. More particularly, the present invention relates to a moving image image file format conversion system and method for reducing the capacity of an image while maintaining the quality thereof for a moving image output from a mobile communication terminal.

With the recent diversification of services related to mobile communication terminals, there is an increasing number of services for transmitting moving characters (so-called avatars) and / or background images (hereinafter referred to as "videos") on the mobile communication terminals and allowing users to use them. As a result, related technologies have been developed very rapidly.

Techniques for realizing the moving image on the web are already well known in various ways, for example, Animated GIF (Graphics Interchange Format). The animated GIF is a format of a graphic file that can cause a predetermined graphic image to move as if it were alive on a web page.

Efforts have been made to implement the animated GIF format on a mobile communication terminal. However, in the mobile communication system, unlike the web, data processing speed, capacity, and resource limitation of the mobile communication terminal are restricted. Due to this, it is very difficult to implement a moving picture in the same format as on the web. In particular, in a mobile communication system, unlike a monitor of a PC, there are difficulties of a relatively very small display device and a limited file size of a mobile communication terminal.

Meanwhile, as an attempt to implement a moving picture such as the animated GIF on a mobile communication terminal, there is a moving picture compression transmission technology for wireless Internet called SIS (Simple Image Service). Since the SIS standard supports gray and color as well as black and white, and has a high compression ratio, the SIS standard can be used in a mobile communication terminal or a mobile communication network without difficulty. It is used for services such as downloading. Accordingly, video content providers currently provide a service by producing a video to be implemented in a mobile communication terminal based on the SIS message transmission standard.                         

However, in the case of producing a moving picture based on the SIS message transmission standard, in the present case, by performing a manual work of a content designer using a tool that can produce a PC-based static or moving picture conforming to the SIS standard. It is losing.

However, if the content can be produced only by manual work, the user has no choice but to use the limited content. If the content is not prepared in advance, the user can freely convert the PC-based video selected by the user freely on the web to the user's mobile terminal. It is virtually impossible to provide a service for transmission.

Therefore, a technique for automatically converting a PC-based moving picture into a format suitable for a mobile communication terminal is required. In the process of automatically converting a PC-based moving picture into a format suitable for a mobile communication terminal, the following problems are expected.

First, since the mobile communication terminal only supports a small data capacity, a technique for reducing the data capacity of the original PC-based moving picture is required.

Second, when the capacity of the data is reduced, since the quality of the original moving picture is accompanied, a technique capable of minimizing the degradation of the quality even if the capacity of the data is reduced is required.

Third, when the size and aspect ratio of the original moving picture do not match the display device of the mobile communication terminal, a technique for adjusting the original moving picture to a size suitable for the display device of the mobile communication terminal, and in this case, a technology for minimizing image quality Is required.                         

Fourth, a technique for adjusting the color of the original moving image to be suitable for the display device of the mobile communication terminal is required.

Accordingly, an object of the present invention is to provide an apparatus, a method for automatically converting a PC-based moving picture into a format suitable for a mobile communication terminal, and a recording medium on which the computer program is recorded. .

In order to achieve the above object, the present invention provides a video image file format conversion system for converting a format of a video image file that implements a video by displaying at least two still images in time series, and analyzing the data of the image file. A frame extraction module for extracting each still image as a frame; A dynamic object region extraction module which compares each of the extracted frames with each other, identifies an image region that changes between frames, and extracts the identified image region as a dynamic object region; It is determined whether the dynamic object regions extracted from different frames are similar to each other, and if similar to each other by a predetermined criterion or more, a layer corresponding to a frame including the set independent objects is set by setting one of the similar dynamic object regions as an independent object. An objectization module for creating a layer; A key frame extraction module that extracts the frame as a key frame when a frame having a difference that is different from a reference frame by more than a predetermined reference is identified among the frames; And a frame reconstruction module for reconstructing the frame based on the extracted key frame.

According to another aspect of the present invention, a video image file format converting method of converting a format of a moving image image file that implements a moving image by displaying at least two or more still images in time series, wherein (1) the data of the image file. Extracting each still image as a frame by analyzing a frame; (2) comparing each of the extracted frames with each other to identify an image area changing between frames, and extracting the identified image area as a dynamic object area; (3) It is determined whether the dynamic object regions extracted from the different frames are similar to each other, and if similar to each other by a predetermined criterion or more, any one of the similar dynamic object regions is set as an independent object and corresponds to a frame including the set independent object. Generating a layer to be formed; (4) extracting a frame as a key frame when a frame having a difference that is different from a reference frame by more than a predetermined reference is identified among the frames; And (5) reconstructing the frame based on the extracted key frame.

According to still another aspect of the present invention, there is provided a recording medium in which a computer program for converting a format of a moving image image file for implementing a moving image by displaying at least two still images in time series is recorded. A frame extraction module for analyzing data of an image file and extracting each of the still images as a frame; A dynamic object region extraction module which compares each of the extracted frames with each other, identifies an image region that changes between frames, and extracts the identified image region as a dynamic object region; It is determined whether the dynamic object regions extracted from different frames are similar to each other, and if similar to each other by a predetermined criterion or more, a layer corresponding to a frame including the set independent objects is set by setting one of the similar dynamic object regions as an independent object. An objectization module for creating a layer; A key frame extraction module that extracts the frame as a key frame when a frame having a difference that is different from a reference frame by more than a predetermined reference is identified among the frames; And a frame reconstruction module for reconstructing the frame based on the extracted key frame.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram conceptually illustrating an example of using a moving image file format conversion system 100 according to an exemplary embodiment of the present invention. The moving image file format conversion system 100 according to the present embodiment is provided as one component of the moving image conversion providing system 10. As another embodiment, the moving image file format conversion system 100 of the present invention may be implemented separately from the moving image conversion providing system 10.

The moving picture conversion providing system 10 of the present embodiment performs data communication with the mobile communication terminal 34 which is a user's terminal through various communication networks, and performs a service for converting a moving image having a desired content and transmitting it to the mobile communication terminal 34. It may be a client-server based server. At this time, the moving image file format conversion system 100 converts the moving image which is the content desired by the user. In addition, the mobile communication terminal 34 according to the present invention is a portable device having a function of displaying a moving image received by performing data communication through a mobile communication network based on a protocol such as CDMA or GSM on a display device (not shown) on the terminal. It is defined as a device such as a telephone or a PCS.

In the present embodiment, the user accesses a service page operated by the content provider 20 using the user's computer system 14 connected to the Internet 18, selects a moving avatar desired by the user, that is, the moving picture of the present invention, and then selects the selected moving picture. Request the transmission of In response to the user's request, the moving picture conversion providing system 10 receives the moving picture original file requested by the user from the content provider 20 through the CP gateway 12.

The moving image conversion providing system 10 converts the received original moving image into a format suitable for the mobile communication terminal 34 by using the moving image file format conversion system 10 of the present invention. The moving picture conversion providing system 10 transmits the converted moving picture to the mobile communication terminal 34 of the user who made the request.

In the present embodiment, the moving picture conversion providing system 10 transmits a short message to the mobile communication terminal 34 through a mobile communication network such as an SMS service server 22, an HLR 24, an MSC / VLR 26, a BSC 28, and a BTS 32. The communication terminal 34 receives a desired moving picture as an image converted through the PDSN 30. The moving picture conversion providing system 10 may provide various types of moving pictures to the mobile communication terminal 34, and the mobile communication terminal 34 may directly request the moving picture conversion providing system 10 to convert and transmit the moving pictures.

The file format of the original moving image in the present invention includes various types of graphic image file formats. In particular, the image file format of the original moving image in the present embodiment is composed of a plurality of still images, and these still images are displayed in time series, whereby the moving image is represented. In other words, in the present embodiment, it is assumed that the original moving image is a file in the animated GIF format.

In addition, the moving image converted by the moving image image file format conversion system 100 of the present invention includes various image formats suitable for transmission to the mobile communication terminal 34. In particular, the converted moving image in this embodiment is assumed to be image data conforming to the SIS (Simple Image Service) message transmission standard.

The moving image file format conversion system 100 of the present embodiment performs an image manipulation process so that the capacity of the image is reduced without significantly affecting the quality of the original moving image of the animated GIF format requested by the user. Converts the graphic image data into a format according to the SIS message transmission standard, which is a format suitable for the mobile communication terminal 34. As another embodiment, the moving image image file format conversion system 100 may perform only manipulation processing of an image on an original moving image of an animated GIF format requested by a user, and may convert graphic image data according to the SIS message transmission standard for the processed image. The conversion to the format may be performed by a separate device (not shown).

Next, the moving image file format conversion system 100 of the present invention will be described in more detail with reference to FIG. 2 is a block diagram conceptually showing a configuration of a moving image file format conversion system 100 according to a preferred embodiment of the present invention. As shown, the moving image file format conversion system 100 of the present embodiment includes a frame extraction module 102, a frame preprocessing module 104, a dynamic object area extraction module 106, an objectization module 108, an image resizing module 110, a color adjustment module 112, and a key. A frame extraction module 114, a frame reconstruction module 116, a file conversion module 118, and a transmission format conversion module 120.

The frame extraction module 102 reads out the original moving image file and extracts each still image serving as a frame from the file. The frame extraction module 102 according to the present embodiment decodes an image file of an animated GIF format as an original, and extracts each still image contained in the file as a frame.

The frame preprocessing module 104 reassembles the image of the frame extracted by the frame extraction module 102 into a frame of the complete image. Since the animated GIF format is animated using the disposal property, transparent color, and background color, some frames are not fully formed images, so each frame is made a complete image for image processing to be described later. Each frame of the Gif file is represented by only the parts that change according to the correlation with the previous frame. The present invention extracts a characteristic frame from a frame composed of a full form image, and therefore, a frame composed of a full form image must first be extracted from a Gif file. In addition, the frame preprocessing module 104 synchronizes frame update times of individual animated GIF files. One moving picture is composed of several Gif files having a hierarchical relationship. Since the delay time of each frame of the Gif file is set irrespective of each other, the update time of the moving picture frame is the frame of several Gif files constituting the moving picture. This is determined by synchronizing the update time of the liver. The frame preprocessing module 104 does not need to perform an operation when the image of the frame extracted by the frame extraction module 102 is a complete image. In this case, therefore, the moving image file format conversion system 100 may not include the frame preprocessing module 104.

The dynamic object region extraction module 106 extracts a moving object region for each of the extracted frames. In the present invention, the dynamic object region is defined as a region different from one another by at least one frame among the regions of the frame. That is, the dynamic object region extraction module 106 compares each pixel of the image of two adjacent frames with each extracted frame, and designates a portion having a different pixel value as the dynamic object region of the frame.

The objectification module 108 objects similar dynamic object regions of the dynamic object regions extracted by the dynamic object region extraction module 106. That is, the objectization module 108 compares the similarity of the pixel areas with respect to each of the extracted dynamic object areas, and when the similarity is more than a predetermined value, the similar dynamic object areas are divided into one AOP (Animation Object Plane). To specify an object. The objectification module 108 obtains information such as the average brightness of the dynamic object area, the average color value, the area width, the length of the major axis and the minor axis, the main color and distribution, the center position coordinates, and weights each piece of information to provide similarity. Obtain

AOP will be described in more detail with reference to FIG. 3. FIG. 3 is a diagram for describing a process of objectizing similar dynamic object regions to AOP. As shown, the objectification module 108 objects certain areas (eg, two butterflies and girls in FIG. 3) 52 and 54 that are repeated as similar areas among the dynamic object areas that are areas of change in each frame 40. Make up. In other words, the objectification module 108 objectizes the dynamic and similar areas in the AOP from the original image in which the objects represented in the image are integrally formed in the image of one frame in the dimensions of a plurality of frames. do.

In addition, the objectization module 108 assigns a layer to the framed AOPs corresponding to the object AOPs. For example, the objectification module 108 may include a first layer for the background image of the frame of FIG. 3, a second layer for the first object 52 represented by two butterflies in FIG. 3, and a second object 54 represented as a girl in FIG. 3. As for the third layer, layers may be sequentially assigned.

Therefore, according to the present invention, by extracting a dynamic and similar area from the image of the plurality of frames from the original image formed integrally and object it with an AOP, to minimize the size of the image of the frame to maximize within a limited capacity To form a frame. Therefore, it is possible to reduce the image capacity without significantly reducing the quality of the moving image.

The key frame extraction module 114 gives key frame priority to the extracted entire frame. The priority of key frames is given in the order in which the movement (change amount) between adjacent frames is large. The movement (change amount) between adjacent frames is determined by the number of changed pixels by comparing the total pixel values of the two frames. The large movement (change amount) between adjacent frames means an important frame in which the motion of the frame characterizes the motion of the entire moving picture. In the present invention, the overall capacity is reduced while maintaining the characteristics of the entire moving picture around the key frame.

Key frame extraction will be described in more detail with reference to FIG. 4. 4 is a diagram for explaining a process of extracting a key frame. For the series of frames shown at the top of FIG. 4, the key frame extraction module 114 compares the movement of the image of each frame with the change of each pixel, for example, designating frames 42a through 42d as key frames.

The frame reconstruction module 116 reconstructs the frame of the original image based on the key frame extracted by the key frame extraction module 114. The frame is reconstructed based on the key frame priority obtained for each layer. Reconstruct the frame using the highest priority key frame and reconstruct the next frame using the frames of the next priority within the allowed file capacity. Therefore, according to the present invention, when it is necessary to reduce the number of frames of the original moving picture for transmission to the mobile communication terminal 34, a more natural animation effect can be provided by reconstructing the frame around the key frame.

On the other hand, the frame reconstruction module 116 performs AOP interpolation by extracting the extracted key frame and the frame of the layer corresponding to the key frame from among the plurality of frames arranged in the at least two layers.

AOP interpolation will be described in detail with reference to FIGS. 5A and 5B. 5A and 5B are diagrams for explaining AOP interpolation. Reference numerals 62, 64, and 66 in FIG. 5A denote first layers, second layers, and third layers, respectively, and reference numeral 68 denotes an integrated image obtained by combining all the images of the first to third layers 62 to 66. Indicates.

In the case of a PC-based animated GIF, each still image is displayed at a time interval, and images are displayed without limitation on the number and capacity of frames. Therefore, when all of the still images are displayed, the composite images A-1, B-1, ..., C-1-a of Fig. 5A are displayed. If the number of frames is to be reduced and transmitted in order to transmit the moving image of FIG. 5A in the SIS format, and if any 4 frames are transmitted without any separate processing, for example, the composite image is B, Ea, Ac, and C-. May be 2-a. In this case, the transmitted composite images B, Ea, Ac, and C-2-a do not consider the motion of the moving image and simply reduce the number of frames when compared with the original image, resulting in considerable image quality degradation. .

In contrast, in the present embodiment, as shown in FIG. 5B, the frame reconstruction module 116 mainly focuses on the key frames A, F, 1, 4, a, and d of the layers 62 to 66 extracted by the key frame extraction module 114. Reconstruct That is, the frame reconstruction module 116 of the present embodiment extracts the frame of the key frame and the layer corresponding thereto based on the key frames A, F, 1, 4, a, and d, so that the composite image is A-1, D-. 3-a, F-4-b, A-1-d and C-2-a. In this case, each of the frames A, F, 1, 4, a and d constituting the synthesized images A-1, D-3-a, F-4-b, A-1-d and C-2-a is Since it is a key frame of layers 62 to 66, the characteristics of the movement of the original composite images A-1, B-1, ..., C-1-a are most effectively represented. Therefore, according to the present embodiment, when the frame number is to be reduced and transmitted, by reconstructing the frame around the key frame, a natural animation effect can be achieved without significantly reducing the quality of the original moving image.

If the size of the original moving picture does not match the size of the display device of the mobile communication terminal 34 to be transmitted, the image resizing module 110 adjusts the size of the original moving picture to suit the display device of the mobile communication terminal 34. It will be described in more detail with reference to FIG. FIG. 6 is a view for explaining a process of adjusting the size of a moving picture that is the original by the image resizing module 110. FIG.

As shown, if the size and / or aspect ratio of the original image 46 does not match the display device 36 of the mobile communication terminal 34, the image 46a may be adjusted even if the size is adjusted in consideration of the aspect ratio of the original image 46. Likewise, a space is generated at both sides of the display device 36 of the terminal 34, and thus there is a problem that the entire screen cannot be utilized. Further, even when the original image 46 is adjusted to remove the blank of the display device 36, there is a problem in which the original image 46 is unnaturally expressed like the image 46b.

In contrast, the image resizing module 110 of the present invention adjusts the original image 46 using a resizing algorithm according to the size and ratio. For example, as shown in the image 46c of FIG. 6, the image resizing module 110 allows the image to be displayed on the entire screen of the display device 36 using a stretching technique only for the background image without damaging the main character of the original image 46. . In addition, the image resizing module 110 allows the image to be displayed on the entire screen of the display device 36 by copying pixels of the edge of the background image without damaging a person who is the main character of the original image 46, as in the image 46d. . The resizing process of the image resizing module 110 is made possible by objectization of the pseudo dynamic object area of the present invention.

Since the color adjustment module 112 may change the color of the original moving image in the process of converting the original moving image into a format suitable for the mobile communication terminal 34, the color adjustment module 112 is configured to be optimized for the mobile communication terminal 34 by reconstructing the color of the image of each frame. Adjust to color. The mobile communication terminal has a difference in the number and color values of colors expressed for each terminal. Therefore, when the same moving picture is played in different terminals, the same moving picture may be expressed in a different color from the original color. Therefore, the color of the moving picture is adjusted according to the characteristics of the terminal so as to be optimally expressed in the mobile communication terminal to be used.

The file conversion module 118 converts the data format of the frame reconstructed by the frame reconstruction module 116 into an image file format suitable for input data format in the SIS message transmission standard. The file conversion module 118 of the present embodiment converts the frame-constructed image data into a BMP (Bitmap) file format on a frame basis. The file conversion module 118 performs conversion for each layer on the reconstructed frame.

The transmission format conversion module 120 converts the data converted into the BMP file format into the format of the SIS message transmission standard. The BMP file format and the SIS message transmission standard are well known in the art to which the present invention pertains, and thus description thereof will be omitted.

Meanwhile, as described above, a function of converting the frame-reconstructed moving picture data into a format suitable for transmission to the mobile communication terminal 34 may be performed by a separate device (not shown), and in this case, the moving picture image file format of the present invention. The conversion system 100 does not have to be equipped with the transmission format conversion module 120.

Next, a moving image file format conversion method according to a preferred embodiment of the present invention will be described in detail. 6 is a flowchart conceptually illustrating a process of converting an original moving image according to a preferred embodiment of the present invention.

First, the frame extraction module 102 of the moving image file format conversion system 100 reads data of a moving image file that is an original, decodes it, and extracts a still image that becomes a frame (S200).

Next, the frame preprocessing module 104 determines whether the image of each frame extracted in S200 is a complete image (S202). If the image is not complete, each frame is reassembled into a frame of the complete image (S204).

Next, the dynamic object region extraction module 106 compares each frame, detects regions with differences between the frames, and extracts the dynamic object region (S206).

Next, the objectification module 108 compares the similarity degree of each dynamic object area extracted in S204, and when the dynamic object areas have a predetermined or more similarity level, objectizes the dynamic object area as an AOP, corresponds to the frame, and makes a layer. It is given (S208).

Next, the key frame extraction module 114 detects and indexes the frame in which the motion is most prominent for each event of the moving image as a key frame (S210).

Next, the frame reconstruction module 116 reconstructs the frame of the moving image based on the key frame detected in S210 (S212). That is, the frame reconstruction module 116 extracts the intermediate frame based on the key frame and performs AOP interpolation.

Next, when the size and / or ratio of the original image does not match the display device 36 of the mobile communication terminal 34, the image resizing module 110 performs resizing to fit the display device 36 (S214). In addition, the color adjustment module 112 adjusts the color of the original image to be optimized for the mobile communication terminal 34 (S216).

Next, the file conversion module 118 converts the frame-reconstructed moving image data into a BMP image file format (S218). Next, the transmission format conversion module 120 converts the converted BMP image file into a format of an SIS message transmission standard suitable for transmission to the mobile communication terminal 34 (S220).

Next, a description will be given of a recording medium 300 on which a computer program for converting moving images is recorded according to a preferred embodiment of the present invention. The computer program according to the present embodiment includes a frame extraction module which decomposes and extracts a moving picture of the original animated GIF format for each frame, a frame preprocessing module for recombining the extracted frame image into a frame of a complete image, and for each of the frames. A dynamic object region extraction module for extracting a dynamic object region, an objectization module for objecting similar dynamic object regions among the extracted dynamic object regions, and a key frame extraction module for retrieving and indexing a key frame by a predetermined unit of a moving image A frame reconstruction module for reconstructing a frame of a moving image based on the extracted key frame, a file conversion module for converting the reconstructed frame into a BMP file format on a frame-by-frame basis, and a BMP file in a format suitable for transmission to the mobile communication terminal 34. Converting It includes a transmission format converting module. Furthermore, the computer program according to the present embodiment adjusts the image size adjusting module to adjust the original image based on the size and aspect ratio of the display device of the mobile communication terminal 34 and to optimize the color of the original image to the mobile communication terminal 34. It may further include a color adjustment module.

The modules include frame extraction module 102, frame preprocessing module 104, dynamic object region extraction module 106, objectification module 108, image resizing module 110, color adjustment module 112, and key frame extraction of the moving image file format conversion system 100. Since the module 114, the frame reconstruction module 116, and the format conversion module 114 have functions corresponding to each, a description of each module is omitted.

Referring to FIG. 8, FIG. 8 is a block diagram conceptually illustrating a recording medium 300 and a computer system 350 in which a computer program for converting an original moving picture is recorded according to a preferred embodiment of the present invention. The program recorded on the recording medium 300 is read by the recording medium drive 358 of the computer system 350 and installed in the hard disk drive 359. Each module of the program installed in the computer system 350 is configured to perform respective functions by operations of the CPU 352, the RAM 354, the ROM 356, and the like of the computer system 350. In this case, the computer system 350 may be installed inside the moving image conversion providing system 10 or connected to the outside to perform the above function.

On the other hand, the recording medium 300 includes optical recording media such as CD-ROM, CD-R, CD-RW, DVD, semiconductor recording media such as flash memory, magnetic recording media such as FD, magnetic tape and the like.

As mentioned above, although this invention was demonstrated through the preferable embodiment, it should be noted that the technical idea of this invention is not limited to the said embodiment, It can be variously modified and implemented within the following claims.

As described above, according to the present invention, since it is possible to convert the original PC-based moving picture into a format suitable for a mobile communication terminal in real time, a user can immediately use various moving pictures on his mobile communication terminal.

Further, according to the present invention, in converting a PC-based moving picture as an original into a format suitable for a mobile communication terminal, it is possible to reduce the capacity of the original moving picture without significantly reducing the quality of the moving picture.

In addition, according to the present invention, it is possible to minimize the deterioration of the quality of the original moving image even if the capacity of the data is reduced, and to implement natural animation on the mobile communication terminal.

Further, according to the present invention, when the original moving picture does not match the size or aspect ratio of the display device of the mobile communication terminal, the original moving picture can be adjusted to a size suitable for the display device of the mobile communication terminal. It is possible to minimize.

Further, according to the present invention, it is possible to adjust the color of the original moving picture so as to optimize the display device of the mobile communication terminal.

Claims (19)

In a moving image file format conversion system for converting a format of a moving image image file that implements a moving image by displaying at least two still images in time series, A frame extraction module for analyzing data of the image file and extracting each of the still images as a frame; A dynamic object region extraction module which compares each of the extracted frames with each other, identifies an image region that changes between frames, and extracts the identified image region as a dynamic object region; It is determined whether the dynamic object regions extracted from different frames are similar to each other, and if similar to each other by a predetermined criterion or more, a layer corresponding to a frame including the set independent objects is set by setting one of the similar dynamic object regions as an independent object. An objectization module for creating a layer; A key frame extraction module that extracts the frame as a key frame when a frame having a difference that is different from a reference frame by more than a predetermined reference is identified among the frames; And And a frame reconstruction module for reconstructing the frame based on the extracted key frame. The method of claim 1, And the image file is a GIF (Graphics Interchange Format). The method of claim 1, And the key frame extraction module extracts key frames by comparing the total pixel values of adjacent frames to give priority to frames having a large number of changed pixels. The method of claim 1, And the frame reconstruction module extracts the extracted key frame and a frame of a layer corresponding to the key frame from among the plurality of frames arranged in at least two layers by the objectification module. The method of claim 1, And a frame preprocessing module for recombining the image of each frame extracted by the frame extraction module into a frame of a complete image. The method of claim 1, And an image sizing module for adjusting the layers so that the size of the image of each frame fits a predetermined reference size. The method of claim 1, And an image color adjustment module for adjusting the color of the image of each frame to meet a predetermined reference color standard. The method of claim 1, And a file conversion module for converting the image data of the reconstructed frame into a file of a BMP (Bitmap) format. The method of claim 1, And a transmission format conversion module for converting the image data of the reconstructed frame into a simple image service (SIS) standard. A moving image file format conversion method for converting a format of a moving image image file for implementing a moving image by displaying at least two still images in time series, (1) extracting a frame by analyzing data of the image file and extracting each of the still images as a frame; (2) comparing each of the extracted frames with each other to identify an image area changing between frames, and extracting the identified image area as a dynamic object area; (3) It is determined whether the dynamic object regions extracted from the different frames are similar to each other, and if similar to each other by a predetermined criterion or more, any one of the similar dynamic object regions is set as an independent object and corresponds to a frame including the set independent object. Generating a layer to be formed; (4) extracting a frame as a key frame when a frame having a difference that is different from a reference frame by more than a predetermined reference is identified among the frames; And (5) reconstructing the frame based on the extracted key frame. The method of claim 10, And the image file is a GIF (Graphics Interchange Format). The method of claim 10, In the step (4), the moving image file format conversion method for extracting key frames by comparing the total pixel values of adjacent frames and giving priority to the frames having a large number of changed pixels. The method of claim 10, In the step (5), the moving image file format conversion method of extracting the extracted key frame and the frame of the layer corresponding to the key frame from the plurality of frames arranged in at least two layers by the objectification module. . The method of claim 10, And (6) recombining the image of each frame extracted by the frame extraction module into a frame of a complete image. The method of claim 10, (7) further comprising the step of adjusting for each layer so that the size of the image of each frame to meet a predetermined reference size. The method of claim 10, (8) a moving image file format conversion method further comprising an image color adjustment module for adjusting the color of the image of each frame to meet a predetermined reference color standard. The method of claim 10, And (9) converting the image data of the reconstructed frame into a file of BMP (Bitmap) format. The method of claim 10, (10) converting the image data of the reconstructed frame into a Simple Image Service (SIS) standard. A recording medium having recorded thereon a computer program for converting a format of a moving image file for realizing moving images by displaying at least two still images in time series, wherein the computer program comprises: A frame extraction module for analyzing data of the image file and extracting each of the still images as a frame; A dynamic object region extraction module which compares each of the extracted frames with each other, identifies an image region that changes between frames, and extracts the identified image region as a dynamic object region; It is determined whether the dynamic object regions extracted from different frames are similar to each other, and if similar to each other by a predetermined criterion or more, a layer corresponding to a frame including the set independent objects is set by setting one of the similar dynamic object regions as an independent object. An objectization module for creating a layer; A key frame extraction module that extracts the frame as a key frame when a frame having a difference that is different from a reference frame by more than a predetermined reference is identified among the frames; And And a frame reconstruction module for reconstructing the frame based on the extracted key frame.

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