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Method and system of sharpening image contour based on CMOS image sensor

An image sensor and image contour technology, which is applied in the field of image processing, can solve the problems of blurred image contour and no consideration of image contour, and achieves the effect of less occupation and less logic resources.

Active Publication Date: 2015-03-04
BEIJING SUPERPIX MICRO TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the video image processing based on the CMOS image sensor in the current technology does not consider the image contour, so the contour of the obtained image is relatively blurred

Method used

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  • Method and system of sharpening image contour based on CMOS image sensor
  • Method and system of sharpening image contour based on CMOS image sensor
  • Method and system of sharpening image contour based on CMOS image sensor

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Embodiment 1

[0063] figure 2 It is a flowchart of an image contour sharpening method based on a CMOS image sensor provided in Embodiment 1 of the present invention. Such as figure 2 As shown, the method includes:

[0064] Step 21. Select a pixel on the current image as a decision point, and extract the brightness values ​​of adjacent pixels in the N×N neighborhood around the decision point.

[0065] In the embodiment of the present invention, the current image may be a YUV image; before performing the step 21, it also includes: the steps of image acquisition, image transmission and image processing;

[0066] Wherein, the image acquisition is to collect original image data from the outside world;

[0067] Image transmission is to compress, transmit and decompress the original image data;

[0068] Image processing is to carry out preprocessing to the image data after decompression to improve image quality; Then, carry out color interpolation processing to the preprocessed image, the RGB ...

Embodiment 2

[0095] An image contour sharpening system based on a CMOS image sensor provided in Embodiment 2 of the present invention; the system mainly includes:

[0096] A decision point selection module 311, configured to select a pixel point on the current image as a decision point;

[0097] A brightness value extraction module 312, configured to extract the brightness values ​​of adjacent pixels in the N×N neighborhood around the decision point;

[0098] A contour point judging module 313, configured to judge whether the judgment point is a contour point by comparing brightness value differences;

[0099] The sharpening processing module 314 is configured to perform high-pass filtering on the decision point if it is a contour point, restore high-frequency information, and calculate a sharpening adjustment amount to perform sharpening processing on the decision point.

[0100] Further, the system also includes: an image acquisition module 32, an image transmission module 33 and an ima...

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Abstract

The invention discloses a method and a system of sharpening an image contour based on a CMOS (Complementary Metal-Oxide-Semiconductor) image sensor. The method comprises the steps: choosing a pixel point on the present image as a judging point and extracting brightness values of the adjacent pixel points of the neighborhood N*N around the judging point; judging whether the judging point is a contour point through the difference comparison of the brightness values; if yes, carrying out high-pass filtering to the judging point, reducing high-frequency information and calculating sharpening adjustment amount to sharpen the judging point. According to the method disclosed by the invention, the image contour can be strengthened and becomes clear.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image contour sharpening method based on a CMOS image sensor. Background technique [0002] With the rapid development of multimedia technology, various video electronic products are being popularized at an extremely fast speed. Current video products are mainly capable of displaying video streams and capturing still images. figure 1 A schematic diagram of the basic working principle of video image processing based on CMOS image sensor in the prior art is given. Such as figure 1 As shown, first, the image acquisition unit obtains the required original image data from the outside world through the image sensor; then the image data is transmitted to the image processing unit through the image transmission unit, including the necessary compression, transmission and decompression processes; and then in the image processing The unit performs the necessary processing on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/357H04N5/202H04N9/04
Inventor 王达智程杰
Owner BEIJING SUPERPIX MICRO TECHNOLOGY CO LTD
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