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Color space changover method and its device

A color space conversion and color space technology, applied in the field of signal processing, can solve the problems of incompatibility between computational complexity and precision, and achieve the effects of reducing computational complexity, reducing chip area, and reducing power consumption

Active Publication Date: 2009-09-30
HONOR DEVICE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the computational complexity and precision cannot be balanced

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  • Color space changover method and its device
  • Color space changover method and its device
  • Color space changover method and its device

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Embodiment Construction

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0047] The first embodiment of the present invention relates to a color space conversion method for converting a first color space into a second color space, wherein the first color space is YC R C B The color space, the second color space is an RGB color space, and the values ​​of each color component can be stretched or unstretched.

[0048] The theoretical basis of this embodiment will be described below first. In the prior art, YC can be realized according to formula (2) or formula (3) R C B The conversion of the color space to the RGB color space, in the present embodiment, some transformations are made to (2) and formula (3), to obtain the color space conversion formula of the present embodiment, the change proce...

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Abstract

The invention relates to the field of signal processing, and discloses a color space conversion method and a device thereof, so that the calculation complexity can be reduced under the condition of maintaining high precision during the color space conversion. In the present invention, matrix multiplication required for color space conversion is realized by using a lookup table and an adder instead of a multiplier. Each color component of the first color space is divided into several segments, the segments at corresponding positions are combined into a segment group, and each bit in the segment group is used as an input to look up a table. Each fragment group can be serially processed, and each fragment group looks up the same table in turn, and the table lookup results are shifted and then summed. Each fragment group can also be processed in parallel, different fragment groups look up different tables, and then sum the table lookup results.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to color space conversion technology. Background technique [0002] There are many ways to express color images. For example, it can be formed by combining red (R), green (G) and blue (B) in different proportions. This is the famous three-primary color principle. This method of expressing color images That is the RGB color space. Another example is through different ratios of brightness (Y) and color difference signals (C R , C B ) represents a color image, and this method of representing a color image is based on YC R C B color space. [0003] The RGB color space is usually applied to display devices, such as monitors. YC R C B One advantage of the color space is that since the human eye's ability to resolve color details is much lower than that of brightness details, the color difference signal can be sub-sampled to reduce the storage capacity required for digital color im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/60H04N9/64
Inventor 罗翔鲲季渊
Owner HONOR DEVICE CO LTD
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