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Image compressing method, image compressing apparatus and image forming apparatus

一种图像压缩、图像的技术，应用在图像通信、图像编码、图像数据处理等方向，能够解决未考虑再现扫描图像运算时间等问题

Active Publication Date: 2011-01-12
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing image compression devices, only attention is paid to improving the compression rate of the compressed image, and no consideration is given to shortening the calculation time for reproducing the scanned image.

Method used

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  • Image compressing method, image compressing apparatus and image forming apparatus
  • Image compressing method, image compressing apparatus and image forming apparatus
  • Image compressing method, image compressing apparatus and image forming apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0076] figure 1 It is a block diagram showing the functional configuration of the image forming apparatus 101 according to Embodiment 1 of the present invention. In this embodiment, the image forming apparatus 101 that functions as a digital multifunction machine having a color copy function, a scan to e-mail function, and the like is exemplified. The image forming apparatus 101 includes a CPU 10, a color image input device 11, a color image output device 12, a communication device 13, an operation panel 14, and a color image processing device 2.

[0077] The color image processing device 2 has: an image storage unit 20, an A / D (analog / digital) conversion unit 21, a shading correction unit 22, an input tone correction unit 23, a segmentation processing unit 24, a color correction unit 25, and a black generation background The color removal section 26, the spatial filter processing section 27, the output gradation correction section 28, the gradation reproduction processing sectio...

Embodiment approach 2

[0228] Figure 24 It is a block diagram showing the functional configuration of an image reading device 102 having a color image processing device 2 as an image compression device according to Embodiment 2 of the present invention. Figure 24 With embodiment 1 figure 1 correspond. In this embodiment, an image reading device 102 functioning as a flatbed scanner device is exemplified. The image reading device 102 has a functional configuration similar to that of the image forming device 101 of the first embodiment. Hereinafter, the difference between the image forming apparatus 101 and the image reading apparatus 102 will be described, and the same reference numerals are given to the parts corresponding to the first embodiment, and the description of these parts is omitted.

[0229] The image reading device 102 has a CPU 10, a color image input device 11, an operation panel 14, and a color image processing device 2. However, unlike the image forming device 101 of the first embodime...

Embodiment approach 3

[0235] In a computer-readable recording medium (hereinafter referred to as a recording medium), the program code (executable program, intermediate code program, or source program) of the computer program for the computer to execute is stored. Here, the computer is, for example, a microprocessor included in a personal computer or a digital multifunction machine. Hereinafter, a personal computer or a digital multifunction device with a microprocessor is referred to as a computer system.

[0236] The recording medium of this embodiment records a program code for realizing the image compression method in the embodiment of the present invention (hereinafter referred to as a computer program of this embodiment).

[0237] When the recording medium of this embodiment is independent of the computer system, the recording medium of this embodiment can be provided in a freely portable manner. Such a recording medium is, for example, a floppy disk. When the recording medium of this embodiment...

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Abstract

A foreground layer generating unit generates a foreground layer on the basis of a foreground mask generated by a foreground mask generating unit and an original image. A binary image processing unit generates N binary images corresponding to N kinds of foreground identifiers on the basis of the foreground layer, and sets a plurality of tiles for each of the N binary images. Further, the binary image processing unit determines whether or not adjacent tiles are to be merged, and then sets tiles obtained by merging tiles determined to be merged, and leaving tiles determined not to be merged as they are. An image compressing unit cuts out rectangular regions from the individual set tiles by employing the binary images, and compresses the rectangular regions.

Description

Technical field [0001] The present invention relates to an image compression method, an image compression device, and an image forming device for compressing images. Background technique [0002] In recent years, the digital image system has achieved amazing development, which has enabled the construction of digital image processing technology to continue to develop. For example, in the fields of digital copiers and digital multifunction machines, electronic data obtained by scanning the original document of a document by a scanner is saved as a file, and the saved file is managed. Furthermore, the file is compressed and sent by e-mail (e-mail). In general, since the image (hereinafter referred to as the scanned image) read by the scanner has a large file size, it is necessary to compress the scanned image in order to store or transmit the scanned image. [0003] As one of the compression technologies for compressing scanned images at a high compression rate, image compression te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/60G06T9/00H04N1/00G03G15/00H04N1/41H04N19/00H04N19/119H04N19/146H04N19/176H04N19/196H04N19/20
CPCG06T9/00H04N1/642G03G15/043H04N19/00278H04N7/26643G03G15/50H04N19/0026G03G15/011H04N19/17H04N19/176
Inventor 松田丰久
Owner SHARP KK
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