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A method and system for enhancing an unevenly illuminated image

A technology of uneven illumination and image, applied in the field of image processing, to achieve the effect of uniform illumination, natural color and rich details

Active Publication Date: 2019-12-13
北交智轨(北京)科技有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method and system for enhancing an unevenly illuminated image to solve the problem of over-enhancement effect caused by the homomorphic filtering image enhancement method in the prior art

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  • A method and system for enhancing an unevenly illuminated image
  • A method and system for enhancing an unevenly illuminated image
  • A method and system for enhancing an unevenly illuminated image

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Embodiment Construction

[0052] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0053] The method and system for enhancing unevenly illuminated images disclosed in the present invention use a method based on spatial multi-scale homomorphic filtering to eliminate the over-enhancement effect caused by the homomorphic filtering image enhancement method in the prior art. The filtering method eliminates the block effect caused by the spatial multi-scale homomorphic filtering method, and finally retains the detailed information of the image to the greatest extent.

[0054] Such as figure 1 As shown, the in...

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Abstract

The invention discloses a method and system for enhancing uneven illumination images. The method includes: S1. Convert the uneven illumination image from RGB to HSV color space, and extract the brightness component image; S2. Perform spatial multi-size processing on the brightness component image. Homomorphic filtering to obtain a preliminary filtered image; S3. Perform guided filtering based on local entropy on the preliminary filtered image to obtain the final filtered image; S4. Use the final filtered image as an enhanced brightness component image, the original hue component image and the original saturation The component images are combined and converted from HSV to RGB color space to obtain an enhanced image. The invention can enhance images with uneven illumination to make them uniformly illuminated, rich in details and natural in color.

Description

technical field [0001] The invention relates to the technical field of image processing. More specifically, it relates to a method and system for enhancing images with uneven illumination. Background technique [0002] Because there are many uncertain factors in camera imaging, the obtained images usually cannot meet people's expected requirements. Therefore, when processing an image, it is very necessary to reduce the degradation of the image and enhance the quality of the image. There are many reasons for image degradation, such as: uneven lighting, too high or too low contrast, low resolution or motion blur, etc. When image degradation caused by the above reasons is dealt with by reducing image degradation, the processing performance is often low, which is manifested in low recognition rate and possible erroneous output results. Therefore, image enhancement plays an important role in image processing. [0003] In the process of digital image enhancement, uneven illumi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/50G06T5/00
CPCG06T5/50G06T2207/20024G06T5/00G06T5/92
Inventor 刘渭滨韩思思邢薇薇郑伟
Owner 北交智轨(北京)科技有限公司
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