Chessboard illumination - Problems using imrotate
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Hello! I'm doing a chessboard with dimensions of 512x512. In my code I should apply a parameter which makes the illumination of the chessboard varies given an angle (MCangle). I used the imrotate function, but the output image shows the chessboard with black corners. I wanted that my rotate image fill my original image. I've tried to use imrotate without the 'crop' parameter, but it shows an error saying "Matrix dimensions must agree.", as expected. Can someone help me with this problem? I would be very thankful!! And sorry if my english is bad.
f1=255*ones(64);
f2=zeros(64);
R1=[f1 f2 f1 f2 f1 f2 f1 f2];
R2=[f2 f1 f2 f1 f2 f1 f2 f1];
chess=[R1;R2;R1;R2;R1;R2;R1;R2];
vl=1:512;
vc=ones(512,1);
MA=vc*vl;
MB=mat2gray(MA);
%illumination intensity
MC=MB*(0.6)+0.2;%MC=MB*(IMAX-IMIN)+IMIN;
MCangle=imrotate(MC,45,'crop');
chessintensity=chess.*MCangle;
chessI8=uint8(chessintensity);
imshow(chessI8)
4 个评论
Joana Teixeira
2022-3-17
Matt J
2022-3-17
Well, you need to edit your post to describe what the actual problem is. Currently, you describe a "matrix dimensions must agree" problem that doesn't exist.
Joana Teixeira
2022-3-17
采纳的回答
f1=255*ones(64);
f2=zeros(64);
R1=[f1 f2 f1 f2 f1 f2 f1 f2];
R2=[f2 f1 f2 f1 f2 f1 f2 f1];
chess=[R1;R2;R1;R2;R1;R2;R1;R2];
[x,y]=ndgrid((1:512)-mean(1:512));
MB=rescale(-x*sind(45)+y*cosd(45),0,1);
%illumination intensity
MCangle=MB*(0.6)+0.2;%MC=MB*(IMAX-IMIN)+IMIN;
chessintensity=chess.*MCangle;
chessI8=uint8(chessintensity);
imshow(chessI8)
2 个评论
Joana Teixeira
2022-3-17
Matt J
2022-3-18
rescale(A,0,1)
will rescale A so that min(A)=0 and max(A)=1.
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