JPS6188375A - Picture data converting device - Google Patents

Abstract

PURPOSE:To calculate respective gaps of compressed data easily, and to edit and display a picture with high speed without having a bit image of the whole picture by counting and storing compressed data length for every line, when the picture data are compressed. CONSTITUTION:A picture is scanned by a scanner 11, read picture data are added to a data switch 12, the output is made into a compressed code for every line unit and stored in a compressed data memory 16. A compressed data length is counted for every line at the compressing pat 13 and stored in a compressed data length memory 15. Further, at an expanding part 16, the contents of the memory 16 are converted to but image data for every line, and stored in an image memory 17. The contents of the memories 15 and 16 registered to a file memory 18 are retrieved and transferred to the memories 15 and 16. At a picture data processing pat 19, the output of the memories 15 and 16 is processed, a switch 12 is controlled, and picture editing and displaying are made highly speedy.

Description

Detailed Description of the Invention: Industrial Field of Application The present invention is an electronic device that inputs image data from a scanner, etc., performs editing such as enlarging or reducing the image once, and registers it as an image file or performs a water test. The present invention relates to an image data conversion device necessary for configuring a file device.

Conventional configuration and its problems FIG. 6 shows the configuration of a conventional image data conversion device.

Image data obtained from the scanner 1 while scanning an image passes through a data switch 48, is compressed and encoded by a compression unit 2, and is stored in a compressed data memory 4. As a compression encoding method, variable length MN (
(Modified Huffman) encoding method etc. are generally used. Therefore, the compressed data memory 4
As shown in the figure, a set of compressed data C4 for each line,
C2...Cn are packed to form a 16 bit/word configuration.

Compressed code EOP is an end code. The decompressing unit 3 sequentially converts the contents of the compressed data memory 4 into bit image data starting from the first address, and stores the bit image data in the image memory 6. The image f&editing section 7 registers the compressed data memory 4 in the file memory 6, searches for necessary files from the file memory 6, and transfers them to the compressed data memory 4. You can still enlarge or reduce the image.

When performing editing such as rotation or display, the image memory 5 in which the bit image of the entire image is stored in advance is used as the processing target. The edited contents of the image memory 6 pass through the data switch 8, the compression unit 2, and the compressed data memory 4, and are registered in the file memory 6.

Such image f/Q data change 1. In the case of the M device, the break for each line of the compressed data memory 4 is 1 from the beginning - Hi place.
Since it cannot be known until the vertex compression code is decoded, when editing or displaying an image, if the first address of the compressed data memory 4 is constantly converted into bit image data by the decompression unit 3, the processing time will be longer. There were problems with operability. Therefore, normally a method is used in which the entire image is converted into bit image data in advance and stored in the image memory 6, and the image is edited and displayed using the image memory 5. This has the disadvantage that a huge amount of image memory 5 is required to store the bit images, making the device expensive.

Purpose of the Invention The present invention, when compressing image data, calculates, saves, and stores the data length of the compressed data for each line at the same time, thereby editing one image without having the bit image of the entire image. The purpose is to display images and images at high speed.

The present invention includes a compression unit that divides an image into a plurality of blocks in the Zlj scanning direction, converts the image data of each block into compressed data, and counts the compressed data length of each block; A compressed data length memory that stores the data length, a compressed data memory that stores the compressed data, an expansion section that converts the compressed data of each block into bit image data in units of blocks, and an image memory that stores the bit image data. 1-plane image data'
This is a replacement lid.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIG. From scanner 11,
Image data obtained while scanning an image passes through a data switch 12, is compressed and encoded line by line by a compression unit 13, and is stored in a compressed data memory 16. Further, the compression unit 13 counts the compressed data length for each 1 rai and stores it in the compressed data length memory 15. The compressed data length memory 15 and the compressed data memory 16 are shown in FIGS. 2a and 2b.
The configuration is as shown in . fi1+I12+...
...2n is the number of words expressing the compressed data length of each line in 16 bits/word. C1, C2,...
...Cn is the compressed data of each line, and a dummy code "o" is added so that it is an integral multiple of 16 binods/word.
is added. The decompression unit 14 stores the compressed data memory 1
6 is converted into bit image data line by line and stored in the image memory 17. The image editing department 19
The compressed data length memory 16 and the contents of the compressed data memory 16 are registered as one file in the file memory 18, or retrieved from the file memory 18 and transferred to the compressed data length memory 16 and the compressed data memory 16. Also, when performing editing fh such as enlarging or reducing the image twice or displaying it, the storage address of the compressed data of the necessary line is calculated from the compressed data length memory 15, and only the corresponding compressed data in the compressed data memory 16 is displayed. By transferring it to the decompressing section 14, it is converted into a bit image data and stored in the image memory 17.

The image editing section 19 processes the image memory 17 and sends the processing results through the data switch 12 and the compression section 13 to the compressed data length memory 15 and the compressed data memory 16.
Store it in Further, line deletion, movement, etc. can be performed by directly processing the compressed data length memo ') 15, -1'j- and the compressed data memory 16.

The configuration of the compression section 13 according to an embodiment of the present invention is shown in the third diagram.

Bit image data SD from the data switch 12,
With the synchronization clock 5CLK and the 1-line valid signal HE as input, the RL converter 21 converts it into a run length code RL. Run length code RL is encoded ROM
22, and the compressed code CD is output. Pressure'l? ? j data correct part 23 is compressed code C
In addition to performing Norial/parallel conversion of D to 16 bits/word, at the end of the 1-line active signal HE, a dummy code '
0"' is added, and the compressed data NCD is output to the compressed data memory 16. Also, the bit length of the compressed code CD is counted, and when 16 is Zll1 compressed data!: < L N
Gold aE:'t+te~riku Output to memory 15.

π′111.1・5 1 return 1・j of the extension part 14 of the bow
4th) One line of compressed data NCD from the data memory 16 is converted into serial compressed data SCD by the PS converter 24. The serial compressed data SCD is inputted to the compressed code register 25 in steps of 1 bit and 7 steps. The output CD of the compression code register 25 becomes the address of the decoding ROM 26, and includes the black and white designation signal BW and the run length code RL.
and a code match signal RLE are output. For the code matching 1 word RLE, the output CD of the code register 25 is
This is a signal that informs whether or not it matches a predetermined code sequence. Image memory 17
Output to. Further, the compressed code register 26 is reset by the code match signal RLE, and the next serial compressed data SCD is input.

In this embodiment, the unit of compression and expansion of image data is 1.
Although the number of lines is not limited to one line, it is possible to easily configure nine lines in the sub-scanning direction as one block, and each block as a unit of compression and expansion.

Effects of the Invention According to the present invention, when compressing image data, the compressed data length for each line is counted and stored. Since only the lines can be expanded at high speed and converted to bit image data, images can be edited and displayed at high speed without having to have memory to store the bit image of the entire image. It can be made European.

Such an image data converter requires only one image as input.

':', F! % It is indispensable for realizing low-cost personal computers, word processors, and image workstations with functions.

4, i; gl +lii・11゛j simple 1 situation light・:n
'l'''lTaimoto Ira・-11の-1 坪）Block 1・Archie 1: 'The block diagram 1 and the ear 2 diagram show the compressed data length memory and piezo data memory of the same actual row. Explanation of data format Figure 1, No. 31A is 1'1 of pressure A accommodation part of the same month.
4-forming Brono Block 4 I: gl is the same)": 'Construction block diagram of the extension part of the opening, 5th No. Row pressure 1.h
11...scanner, 12...data switch, 13...piecrystal unit, 14...-(r1
] Long section, 15... Compressed data length memory, 16...
...pressure jit data memory, 1st image memory,
18...File memory, 19...l:!
j f, '3i? h + collection.

)! Satoshi Nakao, a member of the 11 clans
Figure 1 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] a compression unit that divides the image into a plurality of blocks in the sub-scanning direction, converts the bit image data of each block into compressed data, and counts the compressed data length of the compressed data;
a compressed data length memory that stores the compressed data length; a compressed data memory that stores the compressed data; an expansion unit that converts the compressed data into bit image data in units of blocks; and an image that stores the bit image data. An image data conversion device characterized by having a memory.