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Magdy Y.
Magdy Y.

Reputation: 51

Why variable does not take negative value in Matlab?

I'm new to Matlab. I have these simple lines. The problem is that the sum variable does not take negative values. All variables are double.

 Inp_pixel = Inp_padded(x, y);
 Filter_pixel = Filter(f_row, f_col);
 sum = sum + (Inp_pixel * Filter_pixel);

for example: if Filter_pixel = -1 and Inp_pixel = 150 and sum = 0. the expected result should be -150 but I get sum = 0

Upvotes: 1

Views: 124

Answers (1)

Magdy Y.
Magdy Y.

Reputation: 51

The problem was in Inp_pixel. This variable assigned from an uint8 2D array. that's why this variable didn't take the negative value of the multiplication. I used cast() function to solve this problem. for more details about this function please check this link. MATLAB documentation page

Upvotes: 1

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