Contour detection method based on visual mechanism dark edge enhancement
A technology of edge enhancement and visual mechanism, which is applied in the field of visual mechanism and image processing, can solve the problems of not considering the cross-view zone modulation of previous nodes, ignoring the adjustment effect of the retina on dark edge stimulation, and weakening the interactive connection of visual information flow.
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[0058] The specific implementation process of the present invention will be described below in conjunction with the accompanying drawings. figure 1 It is a schematic diagram of the dark field adjustment calculation model of the present invention, with figure 2 It is a flow chart of natural image contour detection in the present invention.
[0059] Step 1: Simulate the retinal dark field adjustment mechanism, process the input image I(x,y), and obtain the dark field adjustment response I rod (x,y). First obtain the brightness channel L(x,y) of the image I(x,y), and calculate the local brightness average value L after normalization of L(x,y) avg (x,y); Then use the improved Sigmoid function to L avg (x, y) is activated, and the scale parameter σ(x, y) is calculated, as shown in formulas (1) to (4).
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[0064] where (x, y) represents the two-dimensional coordinates of the image, (x m ,y n ) represents the image local window S ...
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