Method and system for enhancing image edge

An image edge and edge enhancement technology, which is applied in image enhancement, image data processing, instruments, etc., can solve the problems of difficult control of edge sharpness, insufficient contrast, and insufficient image edge sharpness, etc., to achieve flexible and convenient control and adjustment, Enhance the contrast between light and dark, and avoid the effect of edge transition distortion

Active Publication Date: 2010-06-09
BYD SEMICON CO LTD
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Problems solved by technology

[0003] If the edge enhancement process is performed according to the general edge enhancement method, that is, the processing method that does not distinguish between the dark edge and the bright edge of the edge, the edge difference is simply increased, which will inevitably lead to darker edges. brighter

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  • Method and system for enhancing image edge
  • Method and system for enhancing image edge

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] During the transmission process, the image data is not transmitted as a whole frame as we see, but is transmitted pixel by pixel with a clock. When the image data undergoes a series of processing and is converted from the initial data (generally in the form of RGB) to the form of YCbCR, one clock prints data representing one pixel information, and these data information are printed through three channels of Y, Cb, and CR, where Y contains Cb and Cr contain color information. The formula for converting the RGB image data collected by the image sensor into YCbCR data is as follows:

[0023] Y...

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Abstract

The invention discloses a method for enhancing an image edge. The method comprises the following steps of: establishing a matrix with a 3x3 brightness value by taking an enhanced point in a YUV image data as a central pixel; calculating gradient brightness values of the central pixel in different directions and judging whether the edge of the central pixel is a bright edge or a dark edge according to the gradient brightness values of the central pixel in the different directions; judging the edge orientation of the central pixel according to the gradient brightness values in different directions; and enhancing the edge of the image data according to the edge orientation of the central pixel and the edge types thereof. In the invention, the image edge is divided into the dark edge and the bright edge and the dark edge and the bright edge are processed separately, so different enhancement values can be superposed to make control and adjustment very convenient and flexible, and the brightness contrast of the edge is enhanced to make the edge look sharper; and meanwhile, the phenomenon that the transient distortion of the edge caused by enhancing the edge can be avoided.

Description

technical field [0001] The invention belongs to the field of digital image processing, in particular to an image edge enhancement method and system. Background technique [0002] Due to the characteristics of small size, low power consumption and high integration level of CMOS sensor, CMOS sensor is more and more widely used in portable electronic products. Most portable devices such as mobile phones, MP4, PDA, and notebook computers are almost equipped with cameras. Let people record unforgettable moments anytime, anywhere. With the development of semiconductor process technology, the performance of CMOS sensor pixels in acquiring image data is getting better and better. However, after obtaining high-quality source image data, it is not complete. The image data obtained directly from the pixels is in the form of Bayer, which is far from the image actually seen by our human eyes. Therefore, in order to obtain an image effect close to that seen by the human eye, we need to ...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 黄勇涛胡文阁梁剑刘芳
Owner BYD SEMICON CO LTD
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