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所以我有一堆代码需要花费大约一分钟的时间来运行,将它跟踪到自适应阈值,特别是一行。关于如何加速或解释为什么这是不可避免的任何建议?“mIM = medfilt2(IM,[ws ws]);”是一切放缓的地方。MATLAB自适应阈值超慢
function bw=adaptivethreshold(IM,ws,C,tm)
%ADAPTIVETHRESHOLD An adaptive thresholding algorithm that seperates the
%foreground from the background with nonuniform illumination.
% bw=adaptivethreshold(IM,ws,C) outputs a binary image bw with the local
% threshold mean-C or median-C to the image IM.
% ws is the local window size.
% tm is 0 or 1, a switch between mean and median. tm=0 mean(default); tm=1 median.
%
% Contributed by ...
% at Tsinghua University, Beijing, China.
%
% For more information, please see
% http://homepages.inf.ed.ac.uk/rbf/HIPR2/adpthrsh.htm
if (nargin<3)
error('You must provide the image IM, the window size ws, and C.');
elseif (nargin==3)
tm=0;
elseif (tm~=0 && tm~=1)
error('tm must be 0 or 1.');
end
IM=mat2gray(IM);
disp(strcat('100: ',datestr(now)))
if tm==0
mIM=imfilter(IM,fspecial('average',ws),'replicate');
else
mIM=medfilt2(IM,[ws ws]);
end
sIM=mIM-IM-C;
bw=im2bw(sIM,0);
bw=imcomplement(bw);
你尝试'gpuArray '在GPU上执行操作?您的函数似乎与gpuArrays兼容,当您读取图像时使用类似'gpuArray(imread(...))'的方法 – Daniel 2015-04-02 20:35:40
中值滤波是一种非线性操作,这是很正常的,需要很长时间。我并不感到惊讶,特别是如果图像很大或者“ws”很大。 – Ratbert 2015-04-02 20:43:47