irank.m

来自澳大利亚Qeensland大学的计算机视觉Matlab工具箱。 This Toolbox provides a number of functions that are useful in co

%IRANK	Fast neighbourhood rank filter
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%	ri = IRANK(image, order, se)
%	ri = IRANK(image, order, se, nbins)
%	ri = IRANK(image, order, se, nbins, edge)
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%	Performs a rank filter over the neighbourhood specified by SE.  
%	The ORDER'th value in rank becomes the corresponding output pixel value.
%	A histogram method is used with NBINS (default 256).
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%	Edge handling flags control what happens when the processing window
%	extends beyond the edge of the image. 	EDGE is either
%		'border' the border value is replicated
%		'none'	 pixels beyond the border are not included in the window
%		'trim'	 output is not computed for pixels whose window crosses
%			 the border, hence output image had reduced dimensions.
%		'wrap'	 the image is assumed to wrap around
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% SEE ALSO:  icircle
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%	Copyright (c) Peter Corke, 1999  Machine Vision Toolbox for Matlab