Illumination unevenness image enhancement method and system

A technology for uneven illumination and images, applied in the field of image processing, to achieve uniform illumination, rich details, and natural colors

Active Publication Date: 2017-05-31
北交智轨(北京)科技有限公司
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[0007] The purpose of the present invention is to provide a method and system for enhancing an unevenly illuminated image t

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  • Illumination unevenness image enhancement method and system
  • Illumination unevenness image enhancement method and system
  • Illumination unevenness image enhancement method and system

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[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 an illumination unevenness image enhancement method and system. The method comprises the steps of S1, converting an illumination unevenness image to an HSV color space from an RGB color space, and extracting a brightness component image; S2, performing spatial multi-size homomorphic filtering on the brightness component image to obtain a primary filtered image; S3, performing local entropy-based steerable filtering on the primary filtered image to obtain a final filtered image; and S4, combining the final filtered image as an enhanced brightness component image with an original hue component image and an original saturation component image, and converting a combined image to the RGB color space from the HSV color space, thereby obtaining an enhanced image. According to the method and the system, the illumination unevenness image can be enhanced, so that the illumination is even, the details are rich, and the color is natural.

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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IPC IPC(8): G06T5/50G06T5/00
CPCG06T5/001G06T5/009G06T5/50G06T2207/20024
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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