JP2008205636A5

JP2008205636A5 -

Info

Publication number: JP2008205636A5
Application number: JP2007036950A
Authority: JP
Filing date: 2007-02-16
Publication date: 2010-04-02

Claims

An image processing apparatus that performs a process of converting an input image into a color space different from the color space of the input image data with reference to a color conversion LUT,
Storage means for storing the input image data 及 beauty the color conversion LUT,
Color conversion means for performing color conversion processing;
A pixel comparison unit that detects a continuous number of the same pixel value by comparing a pixel value of a target pixel in the input image data with a pixel value of a pixel that has undergone color conversion immediately before by the color conversion unit;
The image processing apparatus comprising: a coding means for coding in correspondence with the color-converted pixel value immediately before by the color conversion unit before and number system continuously.

Of the input image data stored in said storage means, further comprising a comparison processing buffer for storing the input image data is to be processed the pixel comparing means,
The color converting means, wherein when the pixel comparing means detects a difference between the pixel value of the color-converted pixel immediately before by the color conversion means and the pixel value of the pixel of interest, the pixel of the target pixel from the memory means Start reading the color conversion LUT corresponding to the value,
The pixel comparing means, claims, characterized in that for comparing the pixel value of an unprocessed pixel of the input image data in parallel with the read operation is stored in the comparison process buffer and the pixel value of the pixel of interest The image processing apparatus according to 1.

The image processing apparatus according to claim 1, wherein the VLIW processor executes a start of a reading operation in the color conversion unit and a comparison of pixel values in the pixel comparison unit.

The image processing apparatus according to claim 1, further comprising a decoding unit configured to decode image data encoded so as to correspond to a pixel value and a continuous number of the pixel value.

Processing storage means for storing input image data 及 beauty color conversion LUT, a comparison buffer for storing input image data to be processed of the input image data stored in the storage means, the image data to be processed and a processor for, with reference to the previous SL color conversion LUT, the input image an image processing method by the image processing apparatus for performing processing for the color conversion to a different color space and the color space of the input image data,
A color conversion step for performing color conversion processing;
A pixel comparison step of detecting a continuous number of the same pixel value by comparing the pixel value of the target pixel in the input image data with the pixel value of the pixel subjected to color conversion immediately before;
Before SL corresponding to cause the color converted pixel values into consecutive number and the immediately preceding and an encoding step for encoding,
In the color conversion step, when detecting a difference between pixel values and the pixel values of the color-converted pixel immediately before the target pixel in the pixel comparing step, corresponding to the pixel value of the target pixel from the memory means Start reading the color conversion LUT,
Wherein in the pixel comparison step, an image and performs a comparison between the pixel value of the unprocessed pixel of the input image data in parallel with the read operation is stored in the comparison process buffer and the pixel value of the pixel of interest Processing method.

The pixel comparison step and the color conversion step are executed by a VLIW processor,
The image processing method according to claim 5 , wherein the comparison processing buffer includes a data cache unit of the VLIW processor.

The pixel comparison step and the color conversion step are executed by a microprocessor.
6. The image processing method according to claim 5 , wherein the comparison processing buffer is constituted by a data memory built in the microprocessor.

Computer
Referring to the color conversion LUT, the input image An image processing equipment to perform the process of color conversion to a different color space and the color space of the input image data,
Storage means for storing the input image data and the color conversion LUT;
Color conversion means for performing color conversion processing;
A pixel comparison unit that detects a continuous number of the same pixel value by comparing a pixel value of a target pixel in the input image data with a pixel value of a pixel that has undergone color conversion immediately before by the color conversion unit ;
Program for functioning as an image processing apparatus and a coding means for coding in correspondence with the color-converted pixel value immediately before by the color conversion unit before and number system continuously.