Method for compressing colour space conversion of 16 bit colour image

A color space conversion and color image technology, applied in the multimedia field, can solve the problems of increased computation, redundancy, etc.

Inactive Publication Date: 2005-04-27
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

Such a method will inevitably increase the amount of computation, and the RGB24 format contains more color information than the RGB16 format, and this information is redundant on display devices that only support the RGB16 format

Method used

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  • Method for compressing colour space conversion of 16 bit colour image
  • Method for compressing colour space conversion of 16 bit colour image
  • Method for compressing colour space conversion of 16 bit colour image

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Embodiment Construction

[0023] When implementing digital image or video compression, all algorithms must be performed in a specific color space. For example, in the currently widely used compression standards, JPEG series, MPEG series, and H.26X series, when the format of the input digital image or video is RGB24, use the recommended transformation formula to transform to YCrCb space, and then perform sampling, Compression steps such as DCT transformation, quantization, run-length coding, and variable-length coding; if the format is RGB16, the RGB16 format is converted to the RGB24 format by complementing bits, and then the above operation steps are performed. The decoding process is reversed, and finally an image or video in RGB24 format can be obtained; if RGB16 format needs to be displayed, the RGB24 format is converted to RGB16 format by truncation. In this process, the compressed space is YCrCb space.

[0024] On the portable mobile device, if the image or video in RGB16 format is compressed, t...

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Abstract

The present invention discloses one kind of color space transformation method for compressing 16-bit color image. On the basis of traditional image or video compression technology, such as JPEG sequence, MPEG sequence and H.26X sequence, one conversion from 24-bit RGB format to 16-bit RGB format is increased to the encoding end, and the color space transformation method is used to eliminate the redundant information in the input end and simplify the operation steps in the decoding end, so as to reduce the decoding complexity and raise the video compression quality.

Description

technical field [0001] The invention relates to the field of multimedia technologies related to portable mobile devices, in particular to a color space conversion method for compressing 16-bit color images. Background technique [0002] With the popularization of portable mobile devices, such as personal digital assistants (PDAs), mobile phones, etc., a large number of multimedia applications based on portable mobile devices have emerged. Portable mobile devices have problems such as weak computing power, short battery life, and 16-bit color LCD panels; and in multimedia, the computational complexity of video decoding is relatively high, so traditional video encoding methods for portable mobile devices cannot meet the requirements. Users' requirements for multimedia, especially video technology-related applications. According to the inherent characteristics of portable devices, the transformation of general video codec technology can improve the processing speed of video de...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/60H04N1/64
Inventor 陈纯卜佳俊李娜
Owner ZHEJIANG UNIV
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