Histogram Intersection

What will be the value on histogram intersection of a same gray image ,i am getting it as 1 is it true of false,and when i increase the brightness of of the image then doing histogram intersection ia m getting 0.4045 like that a value below 1 is my method is right or wrong?

[Sean de Wolski]

Can you please show us your code (a small snippet pertaining to this part). I don't understand what you're doing.

Answer 1

[Leepakshi]

Hi Sunil,

Yes, your method is correct. When you compute the histogram intersection of a grayscale image with itself, the value should be 1 because the histograms are identical, indicating perfect overlap. When you increase the brightness of the image, the histogram shifts, reducing the overlap with the original histogram, which results in a value less than 1 (e.g., 0.4045). This behaviour is expected and confirms that your histogram intersection calculation is working as intended.

Please refer to the documentation page of histogram function: https://in.mathworks.com/help/images/ref/imhist.html

Hope this helps!