How to plot histogram of difference of two images using MATLAB

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Mustafa Uysal
Mustafa Uysal 2019-12-16
编辑： Ridwan Alam 2019-12-17
i would like to calculate difference of two images. Then, histogram of difference of two images. So, when i plot histogram i want to see negative values. But i can't see negative values. So, i think my code is not true. How can i calculate histogram of difference of two images.
My two images are original_result and output_image. And difference of two image is image_of_dif. my result.
Adsız.png

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Ridwan Alam
Ridwan Alam 2019-12-17
编辑：Ridwan Alam 2019-12-17
histogram(image_of_dif)
will plot the histogram showing the distribution of values (both positive and negative differences).
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Mustafa Uysal
Mustafa Uysal 2019-12-17
编辑：Mustafa Uysal 2019-12-17
thanks for reply. i tried this.
image_of_dif = (image_of_dif);
h=histogram(image_of_dif);
figure;
plot(h); %plot histogram
and i see that error
Error using plot
Not enough input arguments.
also i see this result. i don't know whether it is true or notAdsız.png
Ridwan Alam
Ridwan Alam 2019-12-17
编辑：Ridwan Alam 2019-12-17
histogram() by default plots the histogram, which is what your pic represents. And it shows the negative values as you expected, right?
The h is a histogram object, not an array to plot directly. For more details: https://www.mathworks.com/help/matlab/ref/matlab.graphics.chart.primitive.histogram.html
Please accept the answer if it works for you. Thanks!

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