A Method of Combining Image Scaling and Color Space Conversion

A technology for color space conversion and image fusion, applied in color signal processing circuits, cathode ray tube indicators, instruments, etc., can solve the problems of high computational complexity, multi-system resources and overhead, etc., to reduce system resource occupation, reduce The effect of system overhead and performance improvement

Inactive Publication Date: 2011-12-14
杭州斯凯网络科技有限公司
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Problems solved by technology

This method of color adjustment using principal component analysis (PCA) has hi

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  • A Method of Combining Image Scaling and Color Space Conversion
  • A Method of Combining Image Scaling and Color Space Conversion

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Embodiment

[0031] Embodiment: This embodiment is carried out on the embedded platform based on ARM. like figure 1 As shown, the present invention is a method for integrating image scaling and color space conversion, which is to complete the conversion from YUV420 color space to RGB565 color space while performing YUV color space scaling. The steps are as follows: 1) Obtain the three components of luminance, chrominance data pY, pU, pV and the size data of width s_width and height s_height through video image decoding; 2) Input the width d_width and height d_height of the target image; 3) According to Width s_width and height s_height, width d_width and height d_height calculate image horizontal and vertical scaling; 4) For every two columns of data (2x2 window) in every two rows of data of the target image, according to the scaling, linear interpolation is used to calculate the scaling respectively The subsequent chroma components d_U and d_V; 5) According to the scaling ratio, use bili...

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Abstract

The invention discloses a method for combining image scaling and color space switching, which aims at solving the technical problems that the image scaling and the color space switching occupy system resources seriously and the calculation expense is high in an embedded image video processing system in the prior art. In the provided method for combining the image scaling and the color space switching, luma and chroma (YUV) color space scaling is performed and switching from a YUV 420 color space to a red-green-blue (RGB) 565 color space is finished by using a color space switching algorithm at the same time. By the method, the system resource occupation and the system expense are reduced; meanwhile, the system performance of embedded equipment is enhanced greatly through measures, such asscaling sequence optimization, sheet combination, algorithm preference and the like.

Description

technical field [0001] The invention relates to a computer image processing technology, in particular to a method for integrating image scaling and color space conversion for embedded devices. Background technique [0002] In an embedded image and video processing system, image scaling and color space conversion are modules that occupy a lot of system resources. The common way is to process the image in YUV color space, and then convert the image to RGB space for display after processing. For example, when displaying in full screen, it is necessary to enlarge the image, and then perform RGB space conversion on the enlarged image. Of course, it is also possible to convert the color space first and then scale the image in the RGB domain. In theory, the calculation cost is the same, but in fact the latter will consume more CPU resources. [0003] The patent document with publication date of February 16, 2005 and publication number CN1581280 discloses such a technical solution...

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Application Information

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IPC IPC(8): G09G5/02G09G5/06H04N9/67
Inventor 陈长国
Owner 杭州斯凯网络科技有限公司
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