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Image-processing method

A technology for image processing and image reconstruction, applied in the field of image processing, can solve problems such as slow speed and poor effect, and achieve the effect of strong adaptability

Inactive Publication Date: 2009-08-12
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of slow speed and poor effect of the existing image de-illumination problem, and propose a new image processing method

Method used

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Embodiment Construction

[0046] The present invention will be further described below through a specific embodiment.

[0047] The image processing method of this embodiment is carried out according to the following steps:

[0048] 1. Perform LBP transformation on the original image P to obtain the LBP image LBP(P):

[0049] For each pixel of the original image P use the formula LBP = Σ i = 0 P - 1 s ( g i - g c ) · 2 i , The corresponding LBP code is obtained, and finally the LBP image LBP(P) is formed.

[0050] For example, for figure 2 The pixel in the middle of a, because s ( x ) ...

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Abstract

The invention discloses an image processing method, which belongs to the technical field of image processing. The method comprises the following steps of: a) inputting an original image P, and acquiring a conversion image P' by processing the P by a set image conversion method, wherein the P' only retains the size relation of grey among various pixels of the original image; b) generating a reconstructed image R, and acquiring a conversion image R' by processing the R through the image conversion method, wherein the R' is equal to the P'; and c) taking the reconstructed image R as a result of image processing to be output. The image conversion method preferably selects an LBP transformation method. In step b, the method preferably generates the reconstructed image Rmax with maximum pixel grey and the reconstructed image Rmin with minimum pixel grey which satisfy that the R' is equal to the P', and takes the average value of the grey of various pixels in the Rmax and the Rmin as grey of corresponding pixels in the reconstructed image R. The method can be used for image processing such as image de-lighting and the like.

Description

technical field [0001] The invention relates to image processing, in particular to a method for removing uneven illumination of an image to obtain an image with uniform illumination, and belongs to the technical field of image processing. Background technique [0002] Image recognition detection and recognition systems usually have certain restrictions on lighting conditions. Assuming that the processed image is obtained under basically uniform lighting conditions, they only allow changes in lighting conditions in a small range, but the actual lighting conditions are often uneven. Polarized light, side light, and bright light, too dark, and shadows caused by high light will greatly reduce the detection rate and recognition rate of the system. Therefore, image de-illumination processing is more important for image detection and recognition systems. [0003] At present, the research ideas for lighting problems are mainly divided into two categories, transformation-based metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/36
Inventor 祝世虎封举富
Owner PEKING UNIV
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