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Color image processing device and color image processing method

A color image and processing device technology, applied in image communication, electrical digital data processing, color separation/tone correction, etc., can solve the problems of complex timing and difficult control of data transmission, and achieve simplified transmission control process and simplified transmission control process , to achieve the effect of image compression and encoding processing

Inactive Publication Date: 2005-06-22
MURATA MASCH LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

As mentioned above, since the JPEG compression processing is performed in several unit blocks, this makes the timing of data transmission between each image processing module very complicated and difficult to control

Method used

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  • Color image processing device and color image processing method
  • Color image processing device and color image processing method
  • Color image processing device and color image processing method

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Embodiment Construction

[0029] Embodiments of the present invention are described below with reference to the drawings. figure 1 is a functional block diagram of a color image processing apparatus according to an embodiment of the present invention. In this embodiment, the color image processing apparatus 100 has a scanning function and a copying function. figure 1 The main elements relevant to the invention are given. Although not shown in the drawings, the color image processing apparatus 100 includes the configuration of a general copier, such as an operation panel and a paper feeding unit. The color image processing apparatus 100 may also include a configuration for realizing a communication function such as a facsimile communication function.

[0030] In the color image processing apparatus 100, the control unit 120 controls figure 1 Each component in the system also controls the entire color image processing device 100 .

[0031] The scanning unit 102 includes a scanning function. This uni...

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Abstract

A color image processing device, comprising: a first transmission control unit for transmitting quantitative image data of each designated unit; a compression and encoding unit for compressing and encoding the image data; a storage unit for storing data compressed and encoded by the compression and encoding unit; and a second transmission control unit for transmitting the compressed and encoded data from the compression and encoding unit to the storage unit. The second transmission control unit divides and transmits the compressed and encoded image data every time the first transmission control unit transmits image data of a specified unit.

Description

technical field [0001] The invention relates to a color image processing device for compressing and encoding image data. Background technique [0002] As color image processing apparatuses, there are generally known, for example, copiers, scanners, printers, facsimile machines, and peripherals having combinations of these apparatuses. Such a conventional color image processing device generates red, green, blue color (RGB) data by employing a scanning function. [0003] In the case of compressing and encoding RGB data in the Joint Photographic Experts Group (JPEG) method, the RGB data is converted into YCC data (luminance color difference signal). Then, the YCC data is compressed and encoded in several unit blocks (for example, 64 pixels of 8*8). Therefore, the calculation amount can be reduced and the compression effect can be improved. [0004] Through direct memory access (DMA) transfer, the RGB data is transferred to the image processing module for JPEG compression pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F3/08G06F15/00H04N1/40H04N1/56H04N1/64
CPCH04N1/40
Inventor 镰田谦一
Owner MURATA MASCH LTD
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