sum of absolute differences
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Good evening everyone,
I have two images which I seek correspondence by correlation using the sum of absolute differences (SAD) to find the disparity map.
I do not know how to apply the formula of SAD.
thank you
1 个评论
vimal
2012-6-26
You can directly use correlation method..
corr2(im1,im2) is the code for calculating the correlation between two images.
for more details type
doc corr2
in command window..
回答（3 个）
Jan
2012-6-26
While imabsdiff is implemented as efficient MEX (no temporary array created), you can calculate the "sum of absolute differences" easily by hand also:
img1 = rand(640, 480, 3);
img2 = rand(640, 480, 3);
difference = img1 - img2;
absolute = abs(difference);
result = sum(absolute(:));
It is less obvious for UINT8 images, because abs(uint8(10) - uint8(20)) is not uint8(10), uint8(0) due to the saturation effects. If this is not wanted, convert the UINT8 image to double at first.
Alex Taylor
2012-3-30
If you have the Image Processing Toolbox, consider looking at the function imabsdiff as a starting point for computing the absolute difference between two images.
help imabsdiff
indhumathi gunasekar
2016-9-29
0 个投票
i have two 16*16 matrix,i need to find SAD between this. can anyone help me out?
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2012-3-30
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