[英]Unrecognized function or variable 'adaptivethreshold'
I am getting the following error message in Matlab "Unrecognized function or variable 'adaptivethreshold'" when every time I want to use Adaptive Threshold function每次我想使用自适应阈值函数时,我都会在 Matlab 中收到以下错误消息“无法识别的函数或变量‘adaptivethreshold’”
clear;close all;
im1=imread('page.png');
im2=imread('tshape.png');
bwim1=adaptivethreshold(im1,11,0.03,0);
bwim2=adaptivethreshold(im2,15,0.02,0);
subplot(2,2,1);
imshow(im1);
subplot(2,2,2);
imshow(bwim1);
subplot(2,2,3);
imshow(im2);
subplot(2,2,4);
imshow(bwim2);
those coding from https://www.mathworks.com/matlabcentral/fileexchange/8647-local-adaptive-thresholding来自https://www.mathworks.com/matlabcentral/fileexchange/8647-local-adaptive-thresholding的那些编码
You should open MATLAB editor inside a folder containing all files: adaptivethreshold.m
, page.png
, testadaptivethreshold.m
, tshape.png
and run your script testadaptivethreshold
.您应该在包含所有文件的文件夹中打开 MATLAB 编辑器:
adaptivethreshold.m
、 page.png
、 testadaptivethreshold.m
、 tshape.png
并运行您的脚本testadaptivethreshold
。
Or, you can copy-paste the function definition below the script as follows and make sure also that the images are in the same folder or MATLAB search path.或者,您可以按如下方式复制粘贴脚本下方的函数定义,并确保图像位于同一文件夹或 MATLAB 搜索路径中。
clear;close all;
im1=imread('page.png');
im2=imread('tshape.png');
bwim1=adaptivethreshold(im1,11,0.03,0);
bwim2=adaptivethreshold(im2,15,0.02,0);
subplot(2,2,1);
imshow(im1);
subplot(2,2,2);
imshow(bwim1);
subplot(2,2,3);
imshow(im2);
subplot(2,2,4);
imshow(bwim2);
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 Guanglei Xiong (xgl99@mails.tsinghua.edu.cn)
% 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);
if tm==0
mIM=imfilter(IM,fspecial('average',ws),'replicate');
else
mIM=medfilt2(IM,[ws ws]);
end
sIM=mIM-IM-C;
bw=imbinarize(sIM,0);
bw=imcomplement(bw);
end
And here is how it shows the output:以下是它显示输出的方式:
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