cant add matrices of same dimensions
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im trying to add an image to a matrix of ones for which i have used the following code:
c=imread('C:\Users\Richik\Desktop\ima.png');
[x,y]=size(c)
m=ones(x,y);
g=m+c;
but even when the matrix dimensions are same,im getting this error:
??? Error using ==> plus
Matrix dimensions must agree.
i cant figure out why this is happening.....
采纳的回答
Walter Roberson
2015-10-12
Chances are that your PNG image is an RGB image and so is 3 dimensional. You should look at
s = size(c)
[x,y] = size(c)
and I think you will find that y is not equal to s(2). Read the documentation for size() to understand why not.
4 个评论
Terry McGinnis
2015-10-12
编辑：Walter Roberson
2015-10-12
Walter Roberson
2015-10-12
[d1,d2,d3,...,dn] = size(X), for n > 1, returns the sizes of the dimensions of the array X in the variables d1,d2,d3,...,dn, provided the number of output arguments n equals ndims(X). If n does not equal ndims(X), the following exceptions hold:
n < ndims(X) di equals the size of the ith dimension of X for 0<i<n, but dn equals the product of the sizes of the remaining dimensions of X, that is, dimensions n through ndims(X).
Walter Roberson
2015-10-12
A change of 1/256 in the brightness of an image is not necessarily going to be very noticeable, especially if you have not used a full 256 entry colormap
colormap(gray(256))
Terry McGinnis
2015-10-12
更多回答（1 个）
Eng. Fredius Magige
2015-10-12
0 个投票
Hi It has to follow its rule, and might be g=[m,c];
1 个评论
Walter Roberson
2015-10-12
That would, if it worked, append c after m, not add 1 to each element of c.
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