Image processing method and device for eliminating false contour

A technology of image processing and false contour, which is applied in the direction of image communication, color TV parts, TV system parts, etc. It can solve the problems of reducing signal-to-noise ratio, blurring images, increasing noise, etc., so as to save hardware resources and eliminate The effect of false contours

Active Publication Date: 2013-11-13
SOLOMON SYSTECH SHENZHEN LTD
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Problems solved by technology

[0005] However, the method of adding dither or noise to the image is easy to increase unnecessary noise and reduce the signal-to-noise ratio; the smooth (low-pass) filtering method is only suitable for the output bit depth greater than the input bit depth, smooth filtering Only the intermediate colors produced can be expressed; and smooth (low-pass) filtering will blur the image and lose high-frequency image details

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  • Image processing method and device for eliminating false contour
  • Image processing method and device for eliminating false contour
  • Image processing method and device for eliminating false contour

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[0055]The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

[0056] see Figure 4 , in a specific embodiment of the present invention, the shown image processing method for eliminating false contours includes two steps of checking false contours and eliminating false contours, specifically:

[0057] The method includes the following steps:

[0058] S1. Detect each false contour pixel point corresponding to a certain pixel value belonging to the false contour;

[0059] For each pixel point that is a false contour, we apply dithering based on the color distribution of its surrounding neighborhood to eliminate this false contour, so the position of the false conto...

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Abstract

The invention provides an image processing method for eliminating a false contour. The method comprises the following steps of: detecting each false contour pixel point which corresponds to a certain pixel value and belongs to the false contour; and eliminating the false contour by changing the spatial distribution of the pixel values. By changing the spatial distribution of color values and generating new color values by using the vision average characteristics of human eyes, the false contour in an image is eliminated. During elimination of the false contour, details of the image cannot be lost, an additional noise is avoided, bit depth is not required to be increased, and hardware resources are greatly saved.

Description

technical field [0001] The invention relates to image and video processing technology, in particular to an image processing method and device for eliminating "false contours" by changing the spatial distribution of color values. Background technique [0002] Digital images can be expressed as different bit depths (bit depth), such as 8bit / pixel (bpp) for most consumer electronics applications, and 10bit / pixel (bpp) for professional applications. Higher bit depths can express more colors and therefore have higher image quality. However, colors in digital images are often requantized in order to reduce bit depth, for example, a 10bpp image is displayed at 8bpp. Reducing the bit depth results in a smaller number of colors. A smaller number of colors sometimes cannot express areas of continuous color change, and the human visual system can perceive this continuity. These areas are broken into segments, each segment has the same color, and there are slight color differences be...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/14H04N5/21
Inventor 沈操艾瑞克·威斯特
Owner SOLOMON SYSTECH SHENZHEN LTD
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