imhist in image processing

Hello,

I am trying to check how imhist works, by plotting a graph for imhist taking a small 8x8 matrix with different values, I am not sure what x-axis and y-axis represents after the graph is plotted. From my understanding, x-axis represents the intensities of the pixels. what does y-axis represent?

Please explain.

Thank you.

[aditya sahu]

frequency of occurence

[Image Analyst]

You can post this below, as an "Answer" (along with the more accurate answer Thorsten already gave), rather than as a comment up here.

Answer 1

[Thorsten]

The number of pixels of this intensity.