how can i generalize this code?
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And my main work is this,
clear all;
img=imread('CropTest1_crop.jpg','jpg');
Gimg=0.2989*img(:,:,1)+0.5870*img(:,:,2)+0.1140*img(:,:,3);
np=121;
snp=sqrt(np);
height=size(img,1);
width=size(img,2);
H=height/snp;
W=width/snp;
p=[];
for i=1:snp
for j=1:snp
A=round((i-8/10)*H);
B=round((i-2/10)*H);
C=round((j-8/10)*W);
D=round((j-2/10)*W);
if B>height
B=height;
elseif D>width
D=width;
end
ca=Gimg(A:B,C:D);
if mean(mean(ca))<60
ca(ca>mean(mean(ca))-3)=0;
else
ca(ca<mean(mean(ca))+3)=0;
end
[x(j) y(j)]=abc(ca);
end
array=[x; y]';
for j=1:snp
array(j,1)=array(j,1)+round((j-8/10)*W);
array(j,2)=array(j,2)+round((i-8/10)*H);
end
p=[p; array];
end
xp=p(:,1);
yp=p(:,2);
image(img); colormap(gray(256)); axis image;
hold on;
plot(xp,yp,'r*');
disp('Centroiding is done.');
and function of abc in main work is this,
function [meanx meany]=abc(img)
[x,y,z]=size(img);
if (z~=1)
img=0.2989*img(:,:,1)+0.5870*img(:,:,2)+0.1140*img(:,:,3);
end
[rows cols]=size(img);
x=ones(rows,1)*[1:cols];
y=[1:rows]'*ones(1,cols);
area=sum(sum(img));
meanx=sum(sum(double(img).*x))/area;
meany=sum(sum(double(img).*y))/area;
end
if I change the image, my work cannot work accurately.
or different images, how can i generalize my main work specially cropping image?
[you should change the value of variable 'np(number of points)'->1681 when you change the image.]
thank you for your advice and help.
12 个评论
Image Analyst
2013-8-20
Can't you just threshold, and call regionprops()? It's like 3 or 4 lines of code, once you have the threshold determined.
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