Image enhancement method fusing edge gray histogram and human eye visual perception characteristics

A gray histogram and human vision technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problem of inability to ensure effective gray-scale dynamic range, detail information cannot be effectively enhanced, and gray-scale deviation perception ability Weakness and other problems, to achieve the effect of improving visual enhancement, suppressing the effect, and enhancing the visual effect
CN110852977AActive Publication Date: 2020-02-28TIANJIN UNIV
4 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2020-02-28

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an image enhancement method fusing an edge gray histogram and human eye visual perception characteristics. The method comprises the following steps: respectively calculating the gradient in the row direction and the gradient in the column direction of each pixel position in an image, and the total gradient of the pixel position; sorting the total gradients of all pixel positions, finding out the maximum total gradient, and setting a gradient threshold; comparing the total gradient of all pixel positions with a gradient threshold value, marking all image edge pixels of which the total gradient of the pixel positions is greater than the gradient threshold value, and counting the number of edge pixels with the same gray level in all marked image edge pixels to obtain an edge gray level histogram; calculating cumulative probability distribution of which the edge gray level is smaller than a set value; calculating perception sensitivity factors of human eyes under different brightness backgrounds by considering the visual nonlinear characteristics of the human eyes, and performing normalization processing to obtain an optimal gray level adjustment reference value; thus, obtaining an enhanced image. The visual effect of the image is remarkably improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to an image enhancement method. In particular, it relates to an image enhancement method that fuses edge gray histograms and human visual perception characteristics. Background technique

[0002] In real life, due to factors such as poor lighting in the shooting environment and insufficient performance of imaging equipment, the obtained images are prone to blurred details, color distortion, low contrast, and more noise. These degraded images are very important for image analysis. with great difficulty in understanding. For example, in the analysis of medical images, due to the consideration of patient safety inspection and the limitation of image information collection capabilities of medical equipment, the clarity and contrast of various medical images obtained are not ideal, which directly affects the accuracy of doctors' pathological diagnosis. Obviously, it is of great practical significance to enhance a large number of degr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More