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Image edge enhancing method

An image edge and edge technology, which is applied in image enhancement, image analysis, image data processing, etc., can solve the problems of high cost and large space occupation, and achieve good effect, cost saving and area saving effect

Active Publication Date: 2009-06-10
BYD SEMICON CO LTD
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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide an image edge enhancement method, which aims to solve the problem of large space occupation and high cost caused by separate edge enhancement processing based on RGB data in the prior art

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Embodiment Construction

[0014] 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 examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] In the embodiment of the present invention, edge enhancement processing is performed in the interpolation module, and a method of taking as many points as possible on the same edge for edge enhancement processing and then averaging is used to fully suppress the influence of noise on the edge; use a 3×5 The Bayer matrix and a 5×3 Bayer matrix are used to determine the second-order gradient values ​​in the horizontal and vertical directions, and a 5×5 Bayer matrix is ​​used to determine the second-order gradient values ​​in the 135-degree angle direction and the 45-degree angle direction. In orde...

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Abstract

The invention is applicable to the field of digital image processing and provides an image edge enhancing method. The method comprises: according to the two-step gradients of central pixel point in different directions, judging the edge orientation of an image; carrying out the interpolation of the central pixel point and calculating the lost color component of pixel points; and on the basis of Bayer data, enhancing the edge of the image in an interpolation template according to the color of the original component of the central pixel point and the edge orientation of the image. The embodiment of the invention takes the influences of green component values of different pixel points around the central pixel point into full consideration while carrying out edge enhancement of the image, adopts an adaptive edge enhancement algorithm, eliminates the possible influences of noises on the edge, achieves uniform image edge and helps the processed images to achieve good effect. Meanwhile, due to the edge enhancement processing in the interpolation template on the basis of Bayer data, the method saves SRAM required by single edge enhancement processing, as well as saves large areas of elements and costs.

Description

technical field [0001] The invention belongs to the field of digital image processing, in particular to an image edge enhancement method. Background technique [0002] The improvement of image quality is generally realized by enhancing the edge effect of the image. The traditional image edge enhancement method is to interpolate the image first to obtain a full-color RGB image, and then perform second-order Laplacian operations and edge-based operations on the full-color RGB image to achieve the edge of the image. enhanced. Although these methods can greatly improve the image quality, they need to pre-store 2 or 4 rows of RGB data when edge enhancement is performed on the image, that is, need to pre-store 6 or 12 rows of Static Random Access Memory (SRAM) data. Memory, SRAM), occupying a lot of space and high cost. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide an image edge enhancement method, aiming at solving t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/20192G06T5/001G06T5/003G06T2207/10024G06T5/73
Inventor 彭茂胡文阁傅璟军
Owner BYD SEMICON CO LTD
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