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Method and device for image enhancement

An image enhancement, two-dimensional image technology, applied in the field of image processing, can solve the problems of complex calculation and poor processing effect.

Inactive Publication Date: 2014-12-17
深圳市迈瑞思智能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide an image enhancement method and device for the above-mentioned image enhancement method in the prior art, which has poor processing effect on images with strong background light and / or strong foreground light, and complex calculation.

Method used

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  • Method and device for image enhancement
  • Method and device for image enhancement

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Embodiment Construction

[0059] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0060] The image enhancement method and device of the embodiment of the present invention separates the strong background image or the strong foreground image from the input image according to the relationship between the image brightness mean value and the median value. For each type of image, a different nonlinear mapping function is applied to enhance the brightness.

[0061] The image mathematical statistics used in the present invention are image brightness mean value, image brightness median value and the difference between brightness mean value and brightness median value. And the difference between the mean and the median is the absolute value. As shown in formula 1, in formula 1, A is the mean value of the ima...

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Abstract

The invention discloses a method and a device for image enhancement. The device comprises an image receiving module used for receiving a two-dimensional image, a brightness mean value and mid-value computation module used for computing a brightness mean value A and a brightness mid-value M of the two-dimensional image, an enhancement factor computation module used for utilizing a nonlinear function to compute an enhancement factor F of each pixel of the two-dimensional image according to the brightness mean value A and the brightness mid-value M, and an image enhancement module used for correcting the brightness value of each pixel in the two-dimensional image according to the enhancement factor F so as to obtain an enhanced two-dimensional image and outputting. Application of the method and the device has the following beneficial effects that different linear functions are adopted for different types of images to carry out image enhancement processing effectively and quickly, so that the defects of processing all kinds of images by a single method are overcome; the method and the device have a very good processing effect to strong background light and / or strong foreground light images, and computation is simple; fewer system resources can be consumed, and the method and the device have very high real-time processing speed.

Description

technical field [0001] The present invention relates to the field of image processing, and more specifically, to an image enhancement method and device. Background technique [0002] In severe weather such as heavy fog, dust, or low light conditions, the contrast of the image is greatly reduced, and people cannot get useful information from it. In severe weather such as heavy fog, heavy rain, sand and dust, the contrast and color of the outdoor scene image will be changed or degraded, and many features contained in the image will be covered or blurred, resulting in a degraded image, which is very useful for various monitoring have caused great difficulties. [0003] In terms of military reconnaissance and surveillance, in order to implement correct command and achieve combat victory, modern warfare has put forward higher requirements for military reconnaissance. Advanced science and technology are widely used to further expand the scope of reconnaissance and improve the tim...

Claims

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Application Information

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IPC IPC(8): H04N1/409H04N5/21
Inventor 安黄彬张晓霆
Owner 深圳市迈瑞思智能技术有限公司
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