subtracting images processing,
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im trying to subtract two images with the same format in matlab, but unfortunatly im getting the image to dark i cant see anything so what i can do to change im sending the code below
clc, clear; close all;
%read image
a= imread('pentan1h_6uLmin_0240.tif');
b= imread('pentan1h_6uLmin_0250.tif');
c=imsubtract(a,b);
subplot(2,2,1),imshow(a),title('dry')
subplot(2,2,2),imshow(b),title('pen')
subplot(2,2,3),imshow(c),title('after')
this is the picture im getting
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KALYAN ACHARJYA
2019-4-20
编辑：KALYAN ACHARJYA
2019-4-20
0 个投票
If you see the result image, its not exactly compleyely dark. If you subtract the similar pixel elements, definitely you get the black pixels (zero). I don't seems there is any issue with result, as most part of the both suntract images are same. There are minor differences in both images, which are reflected in result image (see some non black pixels).
One Suggestion: If the images same type, make it double then do the subtraction.
What is your aim to doing so?
更多回答（2 个）
Image Analyst
2019-4-20
Try [] to scale your data to your display
imshow(c, []);
wan noor
2019-12-14
0 个投票
Try use iamabsdiff function so that you will always have a non negative result.
1 个评论
Image Analyst
2019-12-14
or imadjust() to scale the intensities to the 1% points of the histogram tails.
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