JP2003116128A - Structure for compressing image data, data processing method and information terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To production of distortion by compression in the case of compressing an image comprising a plurality of division images by using a compression method of compressing the image in the unit of a plurality of blocks. SOLUTION: The structure of image data has a compressed image resulting from compressing image data in a form of a first block structure where the image data are spatially divided and secondary utilizing data of the image data having a second block structure independently of the first block structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression structure of image data which is compressed by applying a compression method for compressing image data displayed in a predetermined display form in a plurality of blocks.
The present invention relates to a data processing method and an information terminal.

[0002]

2. Description of the Related Art In recent years, the needs of users for image processing have increased due to the increased distribution of digital cameras and the diversification of image processing functions of mobile phones, PDAs and the like, and those equipped with a puzzle function using images. Is increasing. Hereinafter, digital cameras, mobile phones, PDAs, etc. are collectively referred to as information terminals. In this information terminal, there are, for example, 15 puzzles in the puzzle function using images. A 15-puzzle is generally arranged on a 4 × 4 grid by disposing 15 (1st to 15th) divided images (pieces) obtained by dividing the image in different positions. , Piece 1
This is a game in which one square is opened and pieces are moved up, down, left and right by using the open squares, and finally the pieces are rearranged in the correct arrangement order.

Some information terminals have a function of creating a 15-puzzle using an image taken or stored. One image that has been shot or stored (hereinafter referred to as the original image) is divided into 16 equal parts to obtain 16 divided images, and one of these 16 divided images is deleted and left. The 15 divided images are allocated to 15 pieces of 15 puzzles, and the arrangement positions of the 15 pieces are rearranged to create a 15 puzzle. Figure 1
Although the original image is shown in FIG. 1, the original image is shown in FIG. 12 after dividing it into 16 pieces and rearranging the arrangement positions of the pieces separately. It becomes a puzzle.

By the way, 15 created using the original image
When compressing and storing a puzzle image of a puzzle, there are cases where it is desired to store the pieces (that is, the divided images) in a state in which the arrangement positions of the pieces (ie, divided images) are rearranged in different order. This is, for example, when a puzzle image of 15 puzzles is newly created using the original image, and the user may want to store the created puzzle image of 15 puzzles for the purpose of later use. To be When compressing and storing in the state where the arrangement positions of the pieces are rearranged in different ways, in addition to the compressed image data obtained by compressing the divided image for 15 pieces corresponding to each piece, how the original image is divided It is necessary to store data (division method data) indicating whether or not the pieces are arranged, and data indicating arrangement order of the pieces (arrangement position order data).

Here, as a compression method applied when storing image data, a compression encoding method such as JPEG or GIF is often used and stored. JPEG is ISO
(International Standardization Organization) and ITU-TS (International Telecommunications Union Telecommunications Standardization Sector) compression coding method for digital still images. Due to its high compression rate and good image quality, it is used for Internet communication worldwide. It is widely distributed as an image format. JPEG includes several compression methods, of which DCT is a typical method.
In (discrete cosine transform) based compression, compression coding is performed by utilizing the fact that neighboring pixels have relatively close values.
JPEG is one of the methods called irreversible compression in which an expanded image obtained by expanding after compression causes deterioration of image quality with respect to the original image. GIF is also one of the compression encoding methods for digital still images, and unlike JPEG, it is a method called lossless compression in which a decompressed image obtained by decompressing (decompressing) after compression maintains the same quality as the original image. Is one.

When the storage method of storing all of the above 15 pieces of image data, division method data, and arrangement position order data is adopted, the number of data to be managed increases and the data management becomes complicated and the processing becomes complicated. It is not preferable.

As another method, as shown in FIG. 12, a case where the divided images are arranged in different positions may be treated as one image data, which is compressed and stored. However, when the image data of the divided image is compressed by a lossy compression method such as JPEG,
If the compression block boundary and the block boundary of the 15th puzzle do not match, the image data of the expanded divided image will be distorted and the image quality will deteriorate, which is not preferable.

Here, the compression block boundary is a boundary that becomes a processing unit when compression processing is performed on the original image. For example, in JPEG, since 8 × 8 pixels are one processing unit, the compression block boundary is 8
The boundary that encloses × 8 pixels as one rectangle corresponds to that. The block boundary of the 15 puzzle corresponds to a dividing line obtained by dividing the original image into four in the horizontal and vertical directions. For example, in the case of an original image of QCIF size (176 × 144 pixels), between 44 pixels and 45 pixels, 88 pixels and 89 pixels, and 132 pixels in the horizontal direction.
The boundary is between the pixel and the 133 pixel, and between the 36 pixel and the 37 pixel in the vertical direction, the 72 pixel and the 73 pixel.
Between pixels, the boundary is between 108 and 109 pixels.

Therefore, in this case, in the vertical direction, QCIF
The block boundary when the size image data is divided into 16 is an integer multiple of 8, and therefore coincides with the JPEG compression block boundary, but the block boundary when the QCIF size image data is divided into 16 is 8 in the horizontal direction. Since it is not an integral multiple, it does not match the block boundary of JPEG compression. Therefore, when the image data of the divided image obtained by dividing the image into 16 parts is compressed and expanded again, the image data is distorted and the image is deteriorated, which is not preferable.

For example, as shown in FIG. 12, when the divided images are separated into one image,
When the image data is compressed into the JPEG image format at a predetermined compression rate, a large distortion occurs near the block boundary when divided into 16 as shown in FIG. FIG. 14 is an image obtained by rearranging the divided images of FIG. 13 to the original arrangement positions.
It can be seen that a large distortion is generated near the block boundary when dividing.

The image is distorted because, as can be seen from FIG. 12, there are positions where the pixel values greatly change across the boundary of each divided image. If the position where the pixel value greatly changes coincides with the JPEG compression block boundary, no large image quality deterioration occurs, but if the position does not coincide, large image quality deterioration occurs. This is JPE
This is because in the case of performing image compression by the G method, the assumption that pixels existing in the vicinity of the block boundary of compression have a relatively close value is broken. The distortion occurs because a large gradation change between pixels on both sides of the compression block boundary is expressed by a limited amount of information.

FIG. 15 shows the original image of FIG. 11 which is not divided into 16 parts but is compressed as JPEG image format at a predetermined compression rate as one image data and then expanded.
In FIG. 15, it can be seen that the distortion as in FIG. 14 does not occur.

If the block boundaries when dividing the original image are matched with the compression block boundaries, the above-mentioned image deterioration can be avoided. That is, the number of vertical and horizontal pixels of the divided image may be an integral multiple of the number of vertical and horizontal pixels of the block which is the compression processing unit. FIG. 16 shows an image in which the original image of FIG. 11 is divided into four, and the arrangement positions of the divided images are rearranged, compressed in a JPEG image format at a predetermined compression ratio, and expanded. ing. Also, FIG.
FIG. 7 shows the divided images of FIG. 16 rearranged to the original arrangement position. In this way, when the original image of FIG. 11 is divided into four, the original image has a QCIF size (176 × 144).
Since the image is a (pixel) image, the horizontal block boundary is between 88 pixels and 89 pixels, and the vertical block boundary is between 72 pixels and 73 pixels. Therefore, the block boundary of the puzzle obtained by dividing the original image into four is
It matches the block boundary of JPEG compression (a position where the horizontal direction and the vertical direction are each an integral multiple of 8 pixels). Therefore, no large distortion is observed near the block boundary when the image is divided into four.

[0014]

As described above, when storing an image composed of a plurality of divided images, all the image data of the divided divided images, the dividing method data, and the arrangement position order data are stored. In the storing method, the number of data to be managed increases, the data management becomes complicated, and the processing becomes complicated.

When irreversible compression such as JPEG is used, it is necessary to match the block boundaries when dividing into a plurality of divided images with the compression block boundaries, and therefore the compression block boundaries, the original image and the divided images. This is not preferable because the degree of freedom of the image size is reduced.

In addition, since the compression method of reversible compression such as GIF does not perform the processing of compressing in block units, there is no problem that the image is deteriorated due to the distortion at the block boundary between the divided images. However, when the lossless compression method is used, the amount of data becomes large in the case of image data represented by a large number of colors, and therefore it is necessary to limit the number of colors in order to reduce the amount of data, which is not preferable.

The present invention has been made to solve the above-mentioned problems, and when the image data displayed in a predetermined display form is compressed using a compression method for compressing it in a plurality of blocks, Image data compression structure capable of suppressing distortion, data processing method,
And to provide an information terminal.

[0018]

In order to achieve the above object, the image data compression structure of the present invention is a compressed image obtained by compressing image data in a form having a first block structure spatially divided. , A second independent of the first block structure
And secondary use data of the image data having a block structure of.

The compression structure of the image data of the present invention is
Image decompressing means for decompressing image data into a plurality of blocks and decompressing a compressed image compressed by a compression method for each block, and decompressed images obtained by decompression are displayed in a predetermined display form. In a compression structure of image data displayed on an information terminal having a display means, a compressed image compressed for each of a plurality of block units to be expanded by the image expansion means and the image data on the display means are displayed. It is characterized by comprising secondary usage data defining a display form at the time of displaying.

According to the data processing method of the present invention, image data is divided into a plurality of blocks, and an image expansion means for expanding a compressed image compressed by a compression method for compressing each of the blocks and a predetermined expanded image are expanded. In a data processing method that can be executed on an information terminal having a display unit for displaying in the display mode, the compressed image is expanded, expansion processing is performed to obtain image data, and the image attached to the compressed image is processed. Based on the secondary usage data that defines the display form when displaying the data, image processing is performed so that the image data obtained by the expansion process is displayed in a predetermined display form, and obtained by the image processing. The image data is
It is characterized in that the display means performs a display process of displaying in the predetermined display form.

An information terminal according to the present invention is an information terminal that expands a compressed image compressed by a compression method of dividing image data into a plurality of blocks and compresses each block, and displays the expanded image data. A decompression unit that decompresses the compressed image to obtain image data, and secondary decompression data that defines a display mode for displaying the image data accompanying the compressed image, obtained by the decompression unit. Image processing means for performing image processing to display the image data in a predetermined display form, and display means for displaying the image data image-processed by the image processing means in the predetermined display form. It is characterized by

As a result, according to the present invention, it is possible to suppress the occurrence of distortion due to compression when the image data displayed in a predetermined display form is compressed using a compression method for compressing the image data into a plurality of blocks. Become.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION (Structure of Communication Terminal Device) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the information terminal according to the embodiment of the present invention. Further, FIG. 2 shows an external view of the information terminal.

As shown in FIG. 1, the information terminal comprises a radio unit 1, a control unit 2, an input / output unit 3, and a power supply unit 4. The wireless unit 1 includes an antenna 11 for wireless communication, an antenna duplexer (DPX) 12, a transmission circuit (TX) 13, a reception circuit (RX) 14, and a frequency synthesizer (SYN) 15.
Is equipped with. The antenna 11 receives a radio frequency signal coming from a base station (not shown) via a radio channel. The antenna duplexer (DPX) 12 receives the radio frequency signal received by the antenna 11 from the receiving circuit (R).
X) 14 is input. Transmission circuit (TX) 13
Is a JP with puzzle image data compressed in JPEG format.
The EG image data and the like are converted into radio frequency signals for wireless transmission and then transmitted. The puzzle image data will be described later in detail.

The transmission circuit (TX) 13 includes a spread spectrum circuit, a frequency converter, and a transmission power amplifier.
The spread spectrum circuit performs spread spectrum processing on the JPEG image data output from the main control unit 21 as data to be transmitted with a predetermined spread code. The modulation method is QPSK (Quadrature PhaseSh).
An orthogonal demodulation system corresponding to the if Keying system is used. The frequency converter mixes the spread spectrum transmission signal with the transmission local oscillation signal generated by the frequency synthesizer (SYN) 15 to up-convert into a signal in the wireless transmission band. Then, the radio frequency signal obtained by being amplified to a predetermined transmission level by the transmission power amplifier is transmitted from the antenna 11 to the base station (not shown) via the antenna duplexer (DPX) 12.

The receiving circuit (RX) 14 is a harmonic amplifier,
It is equipped with a frequency converter, a spectrum despreading circuit and a demodulator. The frequency converter down-converts the received radio frequency signal into a reception intermediate frequency signal or a reception baseband signal by mixing with the reception local oscillation signal generated from the frequency synthesizer (SYN) 15. The spectrum despreading circuit despreads the received signal down-converted by the frequency converter. The demodulator digitally demodulates the received signal that has been subjected to spectrum despreading by the spectrum despreading circuit.
A quadrature demodulation method corresponding to the QPSK method is used as a demodulation method performed by the demodulator. The demodulator outputs the demodulated signal that has been digitally demodulated to the main control unit 21 of the control unit 2.

The frequency synthesizer (SYN) 15 generates a reception local oscillation signal. Further, the frequency of the reception local oscillation signal generated by the frequency synthesizer (SYN) 15 is designated by the main control unit 21 provided in the control unit 2.

Next, the control unit 2 includes a main control unit 21 and a ROM (Read Only) attached to the main control unit 21.
Memory) 22 and RAM (Random Acc)
ess Memory) 23, image processing unit 24, database 25, LCD (Liquid Crystal)
An al display controller 26, a multimedia controller 27, and a sounder driver 28 are provided.

The main control unit 21 is composed of a microprocessor such as a CPU, and based on various programs stored in the ROM 22, the communication terminal device for controlling the connection of the wireless channel and the communication control after the communication link is established. Control the operation of each component. The ROM 22 stores various programs used in the main control unit 21 in advance. RAM23
Stores temporarily control data necessary for executing various programs stored in the ROM 22 by the main control unit 21, image data transmitted via the wireless unit 1, received image data, and the like. .

The image processing section 24 is an image processing main section 24.
4, a JPEG compression / decompression unit 241, a puzzle data determination unit 242, and a puzzle data writing unit 243. The image processing main unit 244 performs image processing such as performing division processing for dividing an image into a plurality of divided images. JPE
The G compression / decompression unit 241 decompresses the JPEG image data compressed by the JPEG compression method according to the JPEG method. The puzzle data determination unit 242 determines whether the image data input to the JPEG compression / decompression unit 241 is the puzzle image data described above, and the determination result is the JPE.
It is output to the G compression / decompression unit 241.

The puzzle data writing unit 243 uses the JPEG
In the comment area of the puzzle image data compressed by the method,
The puzzle data indicating the arrangement position of each divided image forming the puzzle image data is written. Puzzle data is JP
Puzzle image data compressed by EG method is JPEG
It is secondary usage data that defines the display form of the puzzle image data when it is developed by the method and displayed on the LCD 32. The comment area is provided for writing arbitrary character code information in the JPEG image data. The puzzle data written in the comment area will be described in detail later.

The database 25 stores puzzle image data. The LCD control unit 26 uses the LCD 3
2 is controlled to display the image data. The multimedia processing unit 27 controls the camera (CAM) 31 to perform an image capturing operation. Further, the multimedia processing unit 27 converts a captured image captured by the camera (CAM) 31 from the data format unique to the camera (CAM) 31 into 24-bit bitmap image data. The sounder drive unit 28 drives the speaker 36 to output a sound.

The input / output unit 3 includes a camera (CAM) 31 and
LCD 32, key input section (KEY) 35, sounder 3
6 and. The camera (CAM) 31 captures an image and inputs image data of the captured image. The LCD 32 obtains an image taken by the camera (CAM) 31 and an image obtained by developing puzzle image data (puzzle image of 15 puzzles compressed by the JPEG compression method) by the image processing unit 24 by the JPEG method. Is a liquid crystal display device for displaying.

Further, the LCD 32 also displays various management information output from the main control section 21 and representing the operating state of the information terminal. The management information is, for example, phone book data, a detected value of the received electric field strength, the remaining amount of the battery 43, and the like. The key input unit (KEY) 35 is provided with a plurality of keys, and is for inputting instructions associated with execution of various processes by operating the keys. For example, the key input unit (KEY) 35 has keys as shown in FIG. .

The power supply unit 4 includes a voltage generation circuit (PS) 41.
A charging circuit (CHG) 42 and a battery 43 such as a lithium-ion battery. Voltage generation circuit 4
1 is, for example, a DC / DC converter, and generates a power supply voltage Vcc based on the output voltage of the battery 43.
The charging circuit 42 charges the battery 43.

(Image Data Structure) Next, the puzzle image data having the compression structure of the compressed image data used in the present invention will be described. FIG. 3 shows the structure of puzzle image data.

The puzzle image data 50 is, for example, JPE
Compressed image data obtained by compressing in G method (JPEG
Image data). In the JPEG image data, a plurality of pieces of information are divided by a marker, and the area divided by the marker is divided by a JPEG block boundary (this is called a first block area) and a comment marker. There is a region (this is called the second block region). The area delimited by the comment markers is allowed to embed comment data indicated by arbitrary character string information. In the present invention, the puzzle data 51 is embedded as comment data in the area delimited by the comment markers.

Here, FIG. 4 shows an example of displaying the original image on the information terminal, and FIG. 5 shows an example of displaying a puzzle image of 15 puzzles created from the original image of FIG. 4 on the information terminal. Here is an example: Thus, in the puzzle image shown in FIG. 5, the puzzle data 15 is “15PZL274G5FD8AB9.
It is represented by a character string such as "E36C1". The "15PZL" portion of the puzzle data 51 is an identifier for indicating that it is puzzle data. Sixteen characters embedded in the identifier are arrangement position information for indicating the arrangement position of the divided image (piece). As shown in FIG. 5, the arrangement position information is indicated by using the piece number attached to each divided image, and is located at the rightmost arrangement position in the first column on the display screen. The pieces are described in order from right to left in the same column and top to bottom in the row, starting with the piece number of the divided image.

As shown in FIG. 6, the piece numbers are associated with each other according to the arrangement position where the divided image is initially located when the original image is divided. The piece number of the rightmost divided image in the first column is set to "1", and numbers are given in order from right to left in the same column and from top to bottom in the rows. The piece number “G” is an area corresponding to a free area after the divided images are removed. Before rearranging the arrangement positions of the divided images, the puzzle data is “15PZL12345678”.
9ABCDEFG ”. In FIG. 3, the image data 52 of the puzzle image data 50 is JPEG image data obtained by compressing the original image before division in FIG. 4 by the JPEG method.

(Display processing of puzzle image data) Next, a display processing operation for displaying the puzzle image of 15 puzzles obtained by expanding the above-mentioned puzzle image data on the LCD 32 will be described. FIG. 7 is a flowchart showing the operation of the puzzle image display processing.

Here, the puzzle image data corresponding to the puzzle image of 15 puzzles displayed on the LCD 32 is received by the wireless section 1 from a base station (not shown) via a wireless channel and temporarily stored in the RAM 23. It is stored in the database 25 in advance. Further, the puzzle image data created by the image processing unit 24 based on the captured image captured by the camera (CAM) 31 is also the target of the display process. The camera (CAM) 3
The operation of creating the puzzle image data from the captured image taken by No. 1 and the operation of displaying the puzzle image of 15 puzzles corresponding to the created puzzle image data on the LCD 32 will be described in detail later.

Before the display processing of the puzzle image of 15 puzzles corresponding to the puzzle image data, the following processing is performed in advance.

When puzzle image data is received from the base station, the radio frequency signal received by the antenna 11 is demodulated by the receiving circuit (RX) 14 in the radio section 1, and the demodulated signal is sent to the main control section 21. Is output. Main controller 21
Outputs the demodulated signal to the RAM 23 and temporarily stores it. Then, the main control unit 21 determines whether or not the demodulated signal temporarily stored in the RAM 23 is JPEG image data, and when it is determined that the demodulated signal is JPEG image data, the demodulated signal, that is, JPEG image data is subjected to image processing. Output to the unit 24.

When the key input unit (KEY) 35 is operated and an instruction to display the JPEG image data stored in the database 25 is issued, the main control unit 21 responds to the instruction to display the database 25. The JPEG image data is extracted from and output to the image processing unit 24.

Next, the display processing of the puzzle images of 15 puzzles corresponding to the puzzle image data will be described.

From the main control section 21 to the JPE as described above.
When the G image data is output, the image processing unit 24 causes the image processing unit 24 in FIG.
As shown in, first, the JPEG image data is expanded according to the JPEG method to obtain the expanded image data (step S
1). That is, the image processing main unit 244 controls the JPEG compression / expansion unit 241 and the JPEG compression / expansion unit 241 expands the JPEG image data to obtain the expanded image data.
The expanded image data is 24-bit bitmap image data. The expanded image data is the image data of the original image shown in FIG.

Here, J output from the main control unit 21.
The PEG image data is assumed to be puzzle image data corresponding to puzzle images of 15 puzzles as shown in FIG. In this case, the JPEG image data output from the main control unit 21 is the puzzle data “15PZL274G5FD8AB”.
9E36C1 ”and the image data 52 obtained by compressing the original image of FIG. 4 by the JPEG method.

In addition, the puzzle data determination unit 242 displays J
The comment data embedded in the areas of the PEG image data divided by the comment markers is output from the image processing main unit 244. Puzzle data determination unit 242
Then, it is determined whether the comment data is puzzle data. When the puzzle data determination unit 242 detects the character string “15PZL” and the subsequent 16 characters “1” to “G” in the comment data, the puzzle data determination unit 242 determines that the comment data is puzzle data.

Therefore, in the case of the puzzle image data corresponding to the puzzle image of the 15 puzzle shown in FIG. 5, since "15PZL274G5FD8AB9E36C1" is output as the comment data, the puzzle data determination unit 242 causes the comment data to include the characters "15PZL". Since the row and the subsequent 16 characters from "1" to "G" are detected, it is determined that the comment data is puzzle data.

When the puzzle data determination unit 242 determines that the comment data is puzzle data, the JPEG image decompression unit 241 determines that the JPEG image data to be decompressed by the JPEG compression decompression unit 241 is the puzzle image data. A determination result indicating that it is determined to be present is output. At this time, puzzle data is also output to the JPEG compression / decompression unit 241 as the determination result. The JPEG compression / decompression unit 241
The developed image data and the puzzle data output from the puzzle data determination unit 242 are output to the main control unit 21.

The main control section 21 includes a puzzle data determination section 24.
When it is determined that the JPEG image data is puzzle image data in 2, the developed image data and the puzzle data are output again to the image processing main unit 244, and the image processing main unit 2
At 44, display image data to be displayed on the LCD 32 is created.

The image processing main section 244 is a main control section 21.
The developed image data output from is divided into 16 pieces of divided image data, and each divided divided image data is converted into a data format of an LCD display format. Further, among the 16 divided images that have been divided, the divided image existing at the arrangement position of "G" shown in FIG. 6 is deleted (step S2). Furthermore, the image processing main unit 244 uses the puzzle data “15PZL27
As a result of rearranging the divided images on the basis of "4G5FD8AB9E36C1", the display image data in the state of FIG. 5 is output to the LCD control unit 26 (step S3).
The LCD control unit 26 displays the display image data output from the image processing main unit 244 on the LCD 32 (step S4). The main control unit 21 uses data (LCD) indicating the arrangement position of each divided image displayed on the LCD 32.
As the display position data), for example, "274G5
FD8AB9E36C1 "format data in RAM
23 to temporarily store.

Here, when the key input unit (KEY) 35 inputs an instruction to move the arrangement position of a predetermined divided image (YES in step S5), the main control unit 2
In response to the movement instruction, 1 outputs control information to the LCD control unit 26 so that the designated divided image is moved to the designated arrangement position and displayed. The LCD control unit 26 moves and displays a predetermined divided image on the LCD 32 based on the control information output from the main control unit 21. For example, in FIG. 5, when an instruction to shift the divided image of piece number “4” to the right is issued, the divided image of piece number “4” moves to the right as shown in FIG. Is displayed. Further, the main control unit 21 changes the LCD display position data stored in the RAM 23 to “27G45FD8AB9”.
E36C1 ". Here, the positions of "4" and "G" are exchanged.

(Creation of Puzzle Image Data) In the information terminal of the present invention, the puzzle image data corresponding to the puzzle image of 15 puzzles displayed on the LCD 32 is transmitted to another information terminal or stored in the database 25. It is possible to At that time, the puzzle image data creation process shown in FIG. 9 is performed.

For example, if a puzzle image data transmission instruction is input by the key input unit (KEY) 35 while the puzzle image is displayed on the information terminal in the display form as shown in FIG. In the puzzle image of the 15 puzzles currently displayed on the LCD 32, the unit 21 outputs the JPEG image data and L
CD display position data "27G45FD8AB9E36C
1 ”is acquired from the RAM 23, and the puzzle data writing unit 2 is acquired.
It outputs to 43 (step S11). From the LCD display position data “27G45FD8AB9E36C1” output from the main control unit 21, the puzzle data writing unit 243 uses the puzzle data “15PZL27G45FD8AB9E3”.
6C1 ”is created, and the newly created puzzle data is written in the comment area of the JPEG image data also output from the main controller 21 (step S12) to create puzzle image data.

The puzzle image data thus created is transmitted by the main control unit 21 to the transmission circuit (TX) of the radio unit 1.
13 is output. Then, after being converted into a radio frequency signal by the transmission circuit (TX) 13, the signal is transmitted from the antenna 11 to the base station.

Further, the key input section (KEY) 35 is used for L
When a recording instruction to the database 25 of the puzzle image data corresponding to the puzzle image of 15 puzzles displayed on the CD 32 is input, the main control unit 21 stores the puzzle image data created by the puzzle data writing unit 243. It is output to the database 25 and stored.

(Creation of Puzzle Image Data Based on Photographed Image) Further, the operation in the puzzle image data producing process for producing the puzzle image data from the photographed image photographed by the camera (CAM) 31 will be described below. FIG. 10 is a flowchart showing an operation of creating puzzle image data from a captured image.

The main control section 21 has a key input section (KEY) 3
When the image photographing is instructed from 5, the camera (CAM) 31 is controlled via the multimedia processing unit 27 to photograph the image (step S21). The multimedia processing unit 27 captures a captured image (for example, an image of a user's face) captured by the camera (CAM) 31 into the camera (CAM) 31.
The original data format is converted into 24-bit bitmap image data. The main control unit 21 also stores the 24-bit bitmap image data obtained by the conversion in the RAM.
It is output to 23 and is temporarily stored. Further, the image processing main unit 244 converts the 24-bit bitmap image data into an LCD display format and outputs it to the LCD control unit 26. Then, the LCD control unit 26 controls the LCD 32,
The photographed image is displayed (step S22). Here, the main control unit 21 determines whether or not an instruction to create puzzle image data has been issued from the key input unit (KEY) 35 (step S23). When the instruction to create the puzzle image data is issued (YES in step S23), the main control unit 21 causes the R
The 24-bit bitmap image data temporarily stored in the AM 23 is output to the JPEG compression / decompression unit 241. J
The PEG compression / decompression unit 241 compresses the 24-bit bitmap image data output from the main control unit 21 according to the JPEG compression method to create JPEG image data (step S24). Further, the main control unit 21 randomly creates puzzle data such that the arrangement positions of the divided images are different when the captured image is divided into 16 (step S25). For example, in the case of the arrangement position as shown in FIG. 8, the puzzle data created is “15PZL27G45”.
FD8AB9E36C1 ". Then, the puzzle data writing unit 243 creates the puzzle data “15PZL27G45FD8AB9E36C1” created by the main control unit 21.
Is written in the comment area of the JPEG image data created by the JPEG compression / expansion unit 241 (step S26). The puzzle image data in which the puzzle data is written in the comment area of the JPEG image data by the puzzle data writing unit 243 is temporarily stored in the RAM 23 by the main control unit 21.

If a puzzle image data transmission instruction is input by the key input unit (KEY) 35,
The main control unit 21 controls the wireless unit 1 and transmits the puzzle image data stored in the RAM 23. When an instruction to store the puzzle image data in the database 25 is input by the key input unit (KEY) 35, the main control unit 21
Outputs the puzzle image data stored in the RAM 23 to the database 25 for storage.

In this way, one original image is divided into a plurality of divided images, and the arrangement position of each divided image is rearranged.
When image data displayed in the puzzle data display mode of 5 puzzles is transmitted or received by storage or wireless communication,
The original image before division is compressed by the JPEG compression method J
The puzzle data is stored in the comment area in the PEG image data, and the JPEG image data having this structure is stored or transmitted / received. Therefore, when the JPEG image data is expanded, noise does not occur at the block boundary of each divided image, so that the image does not deteriorate. Also,
As the data structure of the puzzle image data, the puzzle data is stored in a comment area that can store arbitrary character information provided in the JPEG image data. Therefore, on the information terminal which cannot recognize the puzzle data, although it is not displayed in the display form of the puzzle image of 15 puzzles, it is displayed in the display form of the undivided original image, so that no attempt is made to display the puzzle image data. There is no problem that it is not displayed.

Although the puzzle data is stored in the comment area in the present embodiment, it may be another area of the JPEG image data, for example, if it is an area according to a standard image format such as an application extension area. Anywhere If it is JPEG image data in which puzzle data is stored in a comment area or an application extension area, which is an area according to a standard image format, it is displayed as a normal single image even when displayed on an information terminal that cannot recognize the puzzle data. It is possible to Further, the present invention can be applied to a device for displaying one or more images separately, such as a water pipe game, in addition to the above-mentioned puzzle data display.

[0063]

As described above in detail, according to the present invention, when the image data displayed in the predetermined display form is compressed using a compression method for compressing it into a plurality of blocks, generation of distortion due to compression is suppressed. It becomes possible to do.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an information terminal according to an embodiment of the present invention.

FIG. 2 is an external view of an information terminal according to the embodiment of the present invention.

FIG. 3 is a diagram showing a structure of puzzle image data.

FIG. 4 is a diagram showing an example in which an original image is displayed on an information terminal.

FIG. 5 is a diagram showing an example in which a puzzle image of 15 puzzles is displayed on the information terminal.

FIG. 6 is a diagram showing an example of piece numbers associated with divided images.

FIG. 7 is a flowchart showing the operation of a puzzle image display process.

FIG. 8 is a diagram showing a display state on the information terminal after moving an arrangement position of divided images.

FIG. 9 is a flowchart showing the operation of the puzzle image data creation processing of the present invention.

FIG. 10 is a flowchart showing an operation of creating puzzle image data from a captured image.

FIG. 11 is a diagram showing an example of an original image.

FIG. 12 is a diagram showing an example of an image obtained by rearranging the arrangement positions of divided images after dividing the original image into 16 parts.

FIG. 13 is a diagram showing an example of an image compressed by the JPEG method with the arrangement positions of the divided images divided into 16 being rearranged.

FIG. 14 is a diagram showing an example of an image obtained by rearranging an image compressed by the JPEG method in a state where the arrangement positions of the divided images divided into 16 are rearranged to the original arrangement positions.

FIG. 15 is a diagram showing an example of an image obtained by compressing an original image by the JPEG method without dividing it.

FIG. 16 is a diagram showing an example of an image obtained by rearranging the arrangement positions of the divided images after dividing the original image into four.

FIG. 17 is a diagram showing an example of an image in which an image compressed by the JPEG method in which the arrangement positions of the divided images divided into four are rearranged is rearranged to the original arrangement position.

[Explanation of symbols]

1 ... Wireless unit, 2 ... Control unit, 3 ... Input / output unit, 4 ... Power supply unit,
11 ... Antenna, 12 ... Antenna common part (DPX), 1
3 ... Transmission circuit (TX), 14 ... Reception circuit (RX), 15
... Frequency synthesizer (SYN), 21 ... Main control unit, 2
2 ... ROM, 23 ... RAM, 24 ... Image processing unit, 241
... JPEG compression / expansion unit, 242 ... Puzzle data determination unit,
243 ... Puzzle data writing unit, 244 ... Image processing main unit, 25 ... Database, 26 ... LCD control unit, 27
... multimedia processing unit, 28 ... sounder driving unit, 31
... camera (CAM), 32 ... LCD, 321 ... LCD display section, 35 ... key input section (KEY), 36 ... sounder,
41 ... Voltage generating circuit (PS), 42 ... Charging circuit (CH
G), 43 ... Battery, 50 ... Puzzle image data, 51
... Puzzle data, 52 ... Image data.

Claims (12)

[Claims] 1. A compressed image obtained by compressing image data in a form having a spatially divided first block structure, and two of the image data having a second block structure independent of the first block structure. A compression structure of image data, characterized in that the compression structure includes the next usage data. 2. The secondary usage data has a structure stored in the compressed image.
The compression structure of the described image data. 3. The compressed image is JPEG image data compressed according to the JPEG method, and the secondary usage data is stored in a comment area or an application area of the JPEG image data. The compression structure of image data according to claim 1. 4. An image decompression means for decompressing image data divided into a plurality of blocks and decompressing a compressed image compressed by a compression method for each block unit, and a decompressed image obtained by decompressing the decompressed image. In a compression structure of image data displayed on an information terminal having a display unit for displaying in a form, a compressed image compressed for each of a plurality of block units to be expanded by the image expansion unit, and the display unit 2. A compression structure of image data, comprising: secondary usage data defining a display form when the image data is displayed. 5. The secondary usage data defines a display form in which the display means divides the image data into a plurality of divided images and displays the divided images in a rearranged arrangement position. The image data compression structure according to claim 4, wherein the image data compression structure is provided. 6. The compressed image is JPEG image data compressed according to the JPEG method, and the secondary usage data is stored in a comment area or an application area of the JPEG image data. The compression structure for image data according to claim 4. 7. An image decompression unit for decompressing image data into a plurality of blocks and decompressing a compressed image compressed by a compression method for each block unit, and the decompressed image thus developed is displayed in a predetermined display form. In a data processing method which can be executed on an information terminal having a display means, a decompressing process for decompressing the compressed image to obtain image data is performed, and the image data attached to the compressed image is displayed. Image processing is performed on the basis of secondary usage data defining a display form so that the image data obtained by the expansion process is displayed in a predetermined display form, and the image data obtained by the image process is A data processing method characterized in that display processing is performed by a display means to display in the predetermined display form. 8. The secondary usage data may define a display form in which the display means divides the image data into a plurality of divided images and displays the divided images in a rearranged arrangement position. The data processing method according to claim 7, wherein 9. The decompression process is a process of decompressing JPEG image data compressed according to the JPEG method to obtain image data, and the image process is stored in a comment area or an application area of the JPEG image data. Based on the secondary usage data, the image data obtained by the expansion processing is divided into a plurality of divided images in the display means, and the arrangement position of the divided images is rearranged. 8. The data processing method according to claim 7, wherein a process of creating data is performed, and the display process is a process of displaying the puzzle image data created by the image process. 10. An information terminal for decompressing image data into a plurality of blocks, decompressing the compressed image compressed by a compression method for each block unit, and displaying the decompressed image data. Then, based on the decompressing means for obtaining the image data, and the secondary usage data defining the display mode when displaying the image data incidental to the compressed image, the image data obtained by the decompressing means is generated. Image processing means for performing image processing so as to display in a predetermined display form, and display means for displaying the image data image-processed by the image processing means in the predetermined display form Information terminal. 11. The secondary usage data defines a display mode in which the image data is divided into a plurality of divided images and the arrangement positions of the divided images are rearranged and displayed in the display means. The information terminal according to claim 10, wherein the information terminal is provided. 12. The expansion means obtains image data by expanding JPEG image data compressed according to the JPEG method, and the image processing means stores the image data in a comment area or an application area of the JPEG image data. Puzzle image data obtained by dividing the image data obtained by the expanding means into a plurality of divided images on the display means and rearranging the arrangement positions of the divided images based on the secondary usage data. 11. The information terminal according to claim 10, wherein the display means displays the puzzle image data created by the image processing means.