Crop an image without using "imcrop" function

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Daniel Carvalho
Daniel Carvalho 2016-3-17
评论： Daniel Carvalho 2016-3-17
Hi, I'm having a problem with this code (x and y are arrays):
function img2 = fcn(x,y,img1)
y1max = y(1,1) + y(1,17); x1max = x(1,1) + x(1,17);
img1=u(y(1,1):y1max,x(1,1):x1max);
end
Simulink gives me an error related with the type and size of variables. In my case, the arrays are in "int32" type. if i write the code with fixed values, the error fades away, for example:
function img2 = fcn(x,y,img1)
img1=u(100:150,50:200);
end
Can you help me? Regards, Daniel

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回答（1 个）

Image Analyst
Image Analyst 2016-3-17
编辑：Image Analyst 2016-3-17
You forgot to give the actual error message - all the red text, not just a paraphrased snippet from it.
Also, read this: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup
Actually I don't see how that code can work because you start to use a variable called "u" but that variable has apparently not been created in the function, nor been passed in through the argument list, so how could it possibly do anything with "u"?
I imagine the real error says something about U not existing, or else something about x and y being only 1-D vectors, not 2-D matrices.
  1 个评论
Daniel Carvalho
Daniel Carvalho 2016-3-17
Sorry, my mistake.
function img2 = fcn(x,y,img1)
y1max = y(1,1) + y(1,17); x1max = x(1,1) + x(1,17);
img2=img1(y(1,1):y1max,x(1,1):x1max);
end
Simulink gives me an error related with the type and size of variables. In my case, the arrays are in "int32" type. if i write the code with fixed values, the error fades away, for example:
function img2 = fcn(x,y,img1)
img2=img1(100:150,50:200);
end
Can you help me? Regards, Daniel

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