KR100571242B1 - Camera video compression method - Google Patents

Abstract

According to the present invention, in the storage of camera image data and the like, the compression value and the compression specific value are stored together using the characteristics of the data, thereby storing the image data as compared with the conventional method of allocating and storing a plurality of bits per pixel. The camera image compression method that can significantly reduce the capacity,

According to the present invention, in the method for compressing an image in a camera system, when original data is input, a first step of generating standard data by filling one from the most significant bit by the number of ones included in the original data ; A second step of determining whether the original data and the standard data are the same; If the original data and the standard data are not the same, the standard data is shifted to generate new standard data, and after updating a specific value counting the number of shifts, the new standard data is the same as the original data. Determining a third step; And a fourth step of generating compressed data including the final compressed data generated by the standard data and a specific value according to the coefficient of the number of shifts when the original data and the standard data are the same.

Image Compression, Camera, Encoding, Decoding

Description

How to compress camera image {METHOD FOR COMPRESSING CAMERA IMAGE}             

1 is a block diagram showing a conventional camera system,

2 is a block diagram showing a camera system to which the present invention is applied;

3 is a flowchart illustrating a camera image compression method according to an embodiment of the present invention;

4 is an operation flowchart showing a compression value updating step of a camera image compression method according to an embodiment of the present invention;

5 is a flowchart illustrating a multi-shift performing step of FIG. 4.

Explanation of symbols on the main parts of the drawings

210: camera unit 220: format transformer

230: LCD module 240: video compression unit

250: main controller 260: memory

The present invention relates to a camera image compression method, and more particularly, to a camera image compression method that can reduce the storage capacity of the image data through stepwise compression in storing the image data.

1 is a block diagram illustrating a conventional camera system, which will be described below.

Such a camera system includes a camera unit 110 for capturing a picture to obtain image data; A format transformer 120 for transforming / compressing image data of the camera unit 110 to generate image information data; An LCD module 130 for displaying image information data of the format transformer 120; A main control unit 140 which receives image information data of the format transformer 120 and designates address data and stores the address data in the memory 150; And a memory 150 for storing the image information data received from the main control unit 140 at the designated address according to the address data designated by the main control unit 140.

However, the data storage method adopted by the conventional camera system described above has a problem that the size occupying the memory is large because it allocates and decompresses and compresses information corresponding to each pixel to store image data of the camera. have.

The present invention devised to solve the above problems, in the storage of camera image data, etc., by storing the compression value and the compression specific value by using the characteristics of the data, by assigning a plurality of bits per conventional pixel to transmit / It is an object of the present invention to provide a camera image compression method that can significantly reduce the storage capacity of the image data as compared to the storage.

In order to achieve the above object, the present invention provides a method for compressing an image in a camera system, wherein, when original data is input, the first data is generated by filling 1's most significant bits by the number of 1's included in the original data. Stage 1; A second step of determining whether the original data and the standard data are the same; If the original data and the standard data are not the same, the standard data is shifted to generate new standard data, and after updating a specific value counting the number of shifts, the new standard data is the same as the original data. Determining a third step; And a fourth step of generating compressed data including the final compressed data generated by the standard data and a specific value according to the coefficient of the number of shifts when the original data and the standard data are the same.

Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily implement the technical idea of the present invention. .

First, Figure 2 is a block diagram showing a camera system to which the present invention is applied, the camera image compression apparatus of the present invention, the camera unit 210, the format transformer 220, the LCD module 230, the image compression unit ( 240, main controller 250, and memory 260.

The camera unit 210 captures a picture, acquires image data, and outputs the image data to a format transformer 220 to be described later.

In addition, the format transformer 220 transforms and compresses the image data input from the camera unit 210 to generate image information data, and the LCD module 230 which describes the image information data later and an image compression which will be described later. It serves to output to the unit 240.

The LCD module 230 displays image information data input from the format transformer 220.

In addition, the image compressor 240 compresses the image information data input from the format transformer 220 through a sequential encoding process for each unit to generate final compressed data, and generates a specific value for each process, Outputting the final compressed data and the plurality of specific values, receiving the stored final compressed data and the plurality of storage specific values stored in the memory 260 to be described later, and performing a sequential decoding process which is a reverse process of the sequential encoding process, The image information data is generated as a result value of the sequential decoding process.

The main controller 250 controls the image compressor 240 and the LCD module 230 and receives the final compressed data and the plurality of specific values from the image compressor 240 to be described later. The memory 260 reads the final compressed data and the plurality of storage specific values from the memory 260, which will be described later, and delivers them to the image compressor 240. Here, the main controller 250 may generate a clock signal having a reference frequency for generating the specific value, and output the clock signal to the image compressor 240.

In addition, the memory 260 stores the final compressed data and the plurality of specific values received from the main controller 250 as the storage final compressed data and the plurality of storage specific values.

3 is an operation flowchart showing a camera image compression method according to an embodiment of the present invention, which will be described in detail below.

)는, 하기 표 1과 같은 형식을 가질 수 있다.First, original data is input to the image compressor 240 (S301). Here, the original data (

) May have a format as shown in Table 1 below.

)에 의한 표준 데이터를 생성하고, 상기 표준 데이터를 글로벌 표준 데이터로서 저장한다(S302). 여기서, 상기 표준 데이터는, 상기 원본 데이터(

) 내에 포함된 1의 갯수 만큼 최상위 비트부터 1을 채움으로써 생성할 수 있다.Then, the original data (

Standard data is generated, and the standard data is stored as global standard data (S302). Here, the standard data is the original data (

It can be generated by filling 1 with the most significant bit as many as 1 contained in).

Thereafter, it is determined whether the original data and the standard data are the same (S303).

Then, when the original data and the standard data are the same, the final compressed data and the specific value generated by the standard data are generated (S304). Here, the specific value is a coefficient value generated in the process of making the standard data equal to the original data, and the final compressed data may be the number of bits having a value of 1 of the standard data. That is, the final compressed data and the specific value stored in the memory have a format as shown in the following table.

If the original data and the standard data are not the same, the standard data is shifted to generate new standard data, the shifting process is counted, and the specific value is generated. In step S303, it is determined whether data and the standard data are the same (S305).

4 is an operation flowchart illustrating a compression value updating step (S305) of the camera image compression method according to an embodiment of the present invention.

First, it is determined whether the least significant bit of the data having the minimum bit including 1 in the standard data is the least significant bit of the standard data (S401). For example, if the original data is 1110001000, the first standard data is 1111000000, and it is determined that the least significant bit of the data 1111 having the minimum bit including 1 in the standard data is not the least significant bit because it is the seventh bit. do. If the original data is 1010101000, the first standard data is 1111000000, and since the least significant bit of the data 1111 having the minimum bit including 1 in the standard data is the seventh bit, it is determined that the original data is not the least significant bit. Subsequently, if the standard data is shifted to 1110000001, it will be determined that the least significant bit of the data 1110000001 having the minimum bit including 1 in the standard data is the least significant bit of the standard data.

Then, when the least significant bit of the data having the minimum bit including 1 in the standard data is not the least significant bit of the standard data, the least significant bit is shifted one bit to the lower direction of the standard data, and the shifted data The data is stored as new standard data (S402). That is, if the standard data is 1111000000, 1110100000 will be stored as new standard data.

Thereafter, the specific value according to the shift coefficient is increased and stored as a new specific value (S403).

If the least significant bit of the data having the minimum bit including 1 in the standard data is the least significant bit of the standard data, the data generated through the sequential multiple shift process is stored as new standard data, and then the specific bit is stored. The process of updating the value proceeds to step S403 (S404). Here, the sequential multiple shift process will be described in detail with reference to FIG. 5 as follows.

First, it is determined whether the bit of the standard data corresponding to the I-th bit is 0 from the least significant bit of the data having the minimum bit including 1 in the global standard data (S501). Here, the value of I is initially set to 2, but may be changed according to a user's definition, which is obviously within the scope of the present invention.

Thereafter, when the bit of the standard data corresponding to the I-th bit from the least significant bit of the data having the least bit including 1 in the global standard data is 0, the I value is increased and then the bit value is increased. The process returns to the determination step S501 (S502).

On the other hand, when the bit of the standard data corresponding to the I-th bit from the least significant bit of the data having the minimum bit including 1 in the global standard data is not 0, the standard data is changed to the global standard data. (S503).

회 상기 표준 데이터의 하위 방향으로 시프트한다(S504). 여기서, 상기

는 초기값으로 1이 세팅되나 도 5에는 편의상 이를 생략한다.Then, from the least significant bit to the I th bit of the data having the least bits including 1 in the standard data,

The shift in the lower direction of the standard data is performed (S504). Where

Is set to an initial value of 1 but is omitted for convenience in FIG. 5.

를 증가시킨다(S505).After that,

Increase (S505).

For example, when the original data is 11001010, the standard data becomes 11110000 and does not match until the standard data becomes 11100001, so that the data having the minimum bit including 1 in the global standard data 11110000 of 11100001 is used. It is determined whether the I (initial value 2) bit is 0 from the least significant bit.

의 초기값) 오른쪽으로 시프트된다. 그 결과, 새로운 표준 데이터는 11011000이 된다.At this time, since it is not 0, the standard data is changed to the global standard data, and the least significant bit of the data having the smallest bit including 1 in the standard data 11110000 from the second (I) th bit to one (

Is shifted to the right). As a result, the new standard data is 11011000.

Thereafter, the least significant bit is shifted until the new standard data is 11010001, and since there is still no data that matches the original data, the data having the least bits including 1 in the global standard data 11110000 of 11010001 is shifted. It is determined whether the 2nd (I) th bit is 0 from the least significant bit.

At this time, since it is 0, the I value is increased by 1, and it is determined whether the 3 (I) th bit is 0 from the least significant bit of the data having the minimum bit including 1 in the global standard data 11110000 of 11010001.

의 초기값) 오른쪽으로 시프트된다. 그 결과, 새로운 표준 데이터는 10111000이 된다.At this time, since it is not 0, the standard data is changed to global standard data, and the least significant bit of the data having the smallest bit including 1 in the standard data 11110000 from the third (I) th bit to one (

Is shifted to the right). As a result, the new standard data is 10111000.

Thereafter, the least significant bit is shifted until the new standard data becomes 10110001, and since there is still no data that matches the original data, the data having the minimum bit including 1 in the global standard data 11110000 of 10110001 is obtained. It is determined whether the 2nd (I) th bit is 0 from the least significant bit.

의 변경값) 오른쪽으로 시프트된다. 그 결과, 새로운 표준 데이터는 11001100이 된다.At this time, since it is not 0, the standard data is changed to global standard data, and two times (from the least significant bit to the second (I) th bit of the data having the minimum bit including 1 in the standard data 11110000)

Shifted to the right). As a result, the new standard data is 11001100.

Thereafter, the least significant bit is shifted until the new standard data becomes 11001010 to match the original data.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawings shown.

According to the present invention, in the storage of camera image data and the like, the compression value and the compression specific value are stored together using the characteristics of the data. There is an advantage that can significantly reduce.

Claims (5)

In a method for compressing an image in a camera system, A first step of generating standard data by filling 1's most significant bit by the number of 1's included in the original data when original data is input; A second step of determining whether the original data and the standard data are the same; If the original data and the standard data are not the same, the standard data is shifted to generate new standard data, and after updating a specific value counting the number of shifts, the new standard data is the same as the original data. Determining a third step; And A fourth step of generating compressed data including the final compressed data generated by the standard data and a specific value according to the coefficient of the number of shifts when the original data and the standard data are the same; Camera image compression method comprising a. delete delete The method of claim 1, The specific value is a count value that counts the number of shifts in the process for the standard data to be identical to the original data, and the final compressed data is the number of bits having a value of 1 of the standard data. Video Compression Method. The method of claim 1, The third step, If the original data and the standard data are not the same, checking whether the least significant bit of the data having the minimum bit including 1 in the standard data is the least significant bit of the standard data; If the least significant bit of the data having the smallest bit including 1 in the standard data is not the least significant bit of the standard data, shift the least significant bit one bit in the lower direction of the standard data to generate new standard data, and Increasing the specified value by one; And If the least significant bit of the data having the smallest bit including 1 in the standard data is the least significant bit of the standard data, generating new standard data through a sequential multiple shift process and increasing the specific value by 1 Camera image compression method comprising a.

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