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Apparatus for image processing by using step gain control and related method thereof

A technology of image processing and gain control, which is applied in the direction of image communication, color TV parts, TV system parts, etc., and can solve problems affecting image quality, etc.

Inactive Publication Date: 2009-04-01
HIMAX TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Flicker and overshoot are side effects of conventional image processing device 100 and will seriously affect image quality

Method used

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  • Apparatus for image processing by using step gain control and related method thereof
  • Apparatus for image processing by using step gain control and related method thereof
  • Apparatus for image processing by using step gain control and related method thereof

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Embodiment Construction

[0020] Please refer to image 3 , image 3 It is an image processing device 300 according to the first embodiment of the present invention. In this embodiment, the image processing device 300 includes an edge detection module 310 , a step gain controller 320 and a calculation module 330 . Such as image 3 As shown, the edge detection module 310 includes a high-pass filter 312 and a first multiplier 314 ; and the calculation module 330 includes a second multiplier 332 and an adder 334 .

[0021] Please also refer to image 3 as well as Figure 4 , Figure 4 for description image 3 A flowchart of the operation of the image processing device 300 is shown. If the result is substantially the same, the image processing step does not start with Figure 4 The steps shown are limited. Referring to the flowchart, the operation of the image processing device 300 is described as follows:

[0022] In step 402, the high-pass filter 312 performs a high-pass filtering operation on ...

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Abstract

An image processing device comprises an edge detection module used for carrying out image edge detection on each pixel in original image data and generating at least one detection result to a target pixel in the original image data; a step gain control module which is coupled with the edge detection module and is used for deciding at least one gain coefficient of the target pixel according to the edge detection result as well as a calculating module which is coupled with the step gain control module and used for adjusting the original grayscale (gray) value of the target pixel according to the gain coefficient so as to generate one output grayscale value of the target pixel.

Description

technical field [0001] The present invention relates to image processing, in particular to a device and related method for adjusting image sharpness by using a step-by-step gain control mechanism. Background technique [0002] Such as figure 1 A conventional image processing device 100 is shown for enhancing the sharpness of image edges. The image processing device 100 includes a high-pass filter 110 , a multiplier 120 , a coring operation unit 130 and an adder 140 . The high-pass filter 110 performs a high-pass filtering operation on an original image input data and generates a high-pass filtering result, and then the multiplier 120 multiplies the high-pass filtering result by a parameter khp to generate an edge detection result, and then the kernelization operation unit 130 The edge detection results are performed as figure 2 The known coring operation shown, finally, the adder 140 sums the original image data and a coring operation result of the coring operation unit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/208H04N5/14
Inventor 王信中
Owner HIMAX TECH LTD