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Image enhancing method based on visual characteristics of human eyes

A technology of image enhancement and human vision, applied in image enhancement, image data processing, instruments, etc., can solve the problem of making full use of neighborhood information

Inactive Publication Date: 2010-02-24
广东中大讯通信息有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In traditional theory, there are many methods for image enhancement, but none of them make full use of the neighborhood information between image pixels, and neighborhood information plays an important role in smoothing images and eliminating noise.

Method used

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  • Image enhancing method based on visual characteristics of human eyes
  • Image enhancing method based on visual characteristics of human eyes
  • Image enhancing method based on visual characteristics of human eyes

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Embodiment Construction

[0027] The image enhancement method based on human visual features of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] (1) if figure 2 Shown is the defined image template window diagram. A total of 4 templates a, b, c, and d need to be defined. Each template is a 3×3 block diagram. Use the template to scan the image and calculate the central pixel and surrounding pixels of the template. If the difference is greater than a certain threshold, the gray value of the central pixel is multiplied by a certain coefficient to enhance the gray value of the pixel, otherwise the gray value of the pixel remains unchanged.

[0029] As shown in the figure, number the pixels of each square module, and assume that the pixel gray values ​​are: m 0 , m 1 ,...m 8 .

[0030] For template a,

[0031] A 11 = m 1 + ...

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Abstract

The invention discloses an image enhancing method based on the visual characteristics of human eyes, for example, the human eyes has poor resolution ratio on grayscale when the grayscale of an image is very high or very low, the human eyes has high resolution ratio when the grayscale is moderate. The image enhancing method considers the visual characteristics of the human eyes in the image processing process and improves the defects of the prior image enhancing method. Neighborhood information plays an important role in the image smoothing and denoising process, thus adjacent pixel points canbe used for enhancing processing efficiency in the image processing process. The image enhancing method can smooth and denoise the image and enables the enhanced image to more accord with the visual characteristics of the human eyes.

Description

technical field [0001] The invention relates to the field of graphics and image processing, in particular to an image enhancement method based on human visual features. Background technique [0002] In some theories, the definition of image enhancement is: "Image enhancement is a technique used to improve the visual effect of an image, or convert an image into a form suitable for human eyes and machine analysis." Image enhancement is an image processing The most basic method, it is usually the preprocessing process of various image analysis and processing. Image enhancement is a technology to improve the quality of image display. It achieves the effect of image enhancement by selectively emphasizing and suppressing certain information in the image. [0003] In image enhancement, many techniques are employed to improve the visual effect of an image. These techniques mainly include histogram-based enhancement and spatial-frequency domain-based enhancement. Histogram equaliz...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 罗笑南刘宁许晓伟陆晴
Owner 广东中大讯通信息有限公司
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