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what is the reason of this error"Field reference for multiple structure elements that is followed by more reference blocks is an error."

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mandana
mandana 2018-1-14
评论： mandana 2018-1-29
hi.i have RGB image and want to change the value of pixels that are zero into 255 .i use the follow code but this run just once and for i=1 and j=2 return this error "Field reference for multiple structure elements that is followed by more reference blocks is an error." why? how can i solve this error?
S=size(imrgb);
num_rowgray=S(1,1);
num_colgray=S(1,2);
imr = imrgb(:,:,1);
img = imrgb(:,:,2);
imb = imrgb(:,:,3);
imcolor.r=[];
imcolor.g=[];
imcolor.b=[];
for i=1:num_rowgray
for j=1:num_colgray
imcolor(i,j).r=imr(i,j);
imcolor(i,j).g=img(i,j);
imcolor(i,j).b=imb(i,j);
if imcolor.r (i,j)==0 && imcolor.g (i,j)==0 && imcolor.b (i,j)==0
imcolor(i,j).r =255;
imcolor(i,j).g =255;
imcolor(i,j).b =255;
else
imcolor(i,j).r(i,j)=0;
imcolor(i,j).g(i,j)=0;
imcolor(i,j).b(i,j)=0;
end
j=j+1;
end
i=i+1;
end

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采纳的回答

Stephen23
Stephen23 2018-1-14
There is no need to use loops and such complicated code. Logical indexing is much simpler:
X = all(imrgb==0,3);
imrgb(X(:,:,[1,1,1])) = 255;
And that is all.

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