A device to intensify image edge and its method

A technology of image edge and enhancement device, which is applied in the direction of image communication, TV, color TV parts, etc., and can solve problems such as misjudgment, excessive enhancement, and rough pictures

Inactive Publication Date: 2010-03-17
QUANTA COMPUTER INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, under the above structure, if the pixel p i，j is exactly the vertical edge and horizontal edge of the object, then the pixel p i，j will be repeatedly regarded as points on the edge by the high-pass filter 220 and the high-pass filter 130, and the pixel p will be raised excessively i，j Bright contrast with surrounding pixels
when pixel p i，j When it is noise, the above structure may be misjudged, so that the part of the picture that is not the edge of the object will increase the contrast and produce more obvious noise points, making the picture look rough

Method used

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  • A device to intensify image edge and its method
  • A device to intensify image edge and its method
  • A device to intensify image edge and its method

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[0031] Please refer to image 3 , which is a structural diagram of an image edge enhancement device according to a preferred embodiment of the present invention. The image edge enhancement device 300 is used to adjust the brightness value of a pixel, in this embodiment, the pixel p i，j illustrate. The image edge enhancement device 300 includes register units 310 ( 1 )-( 6 ), an edge judging circuit 321 , an edge judging circuit 322 and a processing circuit 330 .

[0032] Please refer to figure 1 , pixel p i，j is the target to be processed for image edge enhancement, surrounding the pixel p i，j is the 8 surrounding pixels p i-1，j+1 ,p i，j+1 ,p i+1，j+1 ,p i-1，j ,p i+1，j ,p i-1，j-1 ,p i，j-1 ,p i+1，j-1 , surrounding pixels and pixel p i，j The closest is the boundary pixel p i，j+1 ,p i-1，j ,p i，j-1 ,p i+1，j , while the rest of the surrounding pixels are critical pixels, such as: p i-1，j+1 ,p i+1，j+1 ,p i-1，j-1 ,p i+1，j-1 .

[0033] The register units 310(1)-(6...

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Abstract

The invention relates to an image edge strengthener and relative method, to adjust the brightness of one pixel. Wherein, said device comprises first edge judge circuit, second edge judge circuit and processing circuit; the first circuit at the first direction extracts and outputs the first edge value; the second edge judge circuit extracts the pixel edge at second direction to output second edge value; the processing circuit based on the brightness of several around pixels, the first edge value and the second edge value to decide one operation mode, to output the adjusted brightness of pixel.The invention can effectively avoid enlarging the noise of image, and avoid repeatedly strengthening same image edge by different edge judge circuits.

Description

technical field [0001] The present invention relates to an image processing device and its method, and in particular to an image edge enhancement device and its method. Background technique [0002] Image edge enhancement technology is to adjust the contrast or brightness of the edge of the object in the display screen to make the outline of the image clear, so that the object is more obvious, and the image is clearer and clearer under the sense of the human eye. Please refer to figure 1 , which is a schematic diagram of a pixel and its surrounding pixels. When the edge of the image is enhanced, it is to judge the pixel p ，i，j Whether it is the edge of the object and adjust the brightness, if the pixel p i，j is the edge of the object and makes it compared to the surrounding pixels p i-1，j+1 ,p i，j+1 ,p i+1，j+1 ,p i-1，j ,p i+1，j ,p i-1，j-1 ,p i，j-1 and p i+1，j-1 The contrast is higher. [0003] Please refer to figure 2 , which is a structural diagram of an exist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/57
Inventor 陈德懿
Owner QUANTA COMPUTER INC
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