how to Matlab function to calculate probability density function of n image?

I want to calculate the probability density function of an image. can you tell me what is the matlab function

Answer 1

[Image Analyst]

Assuming you mean the pdf of gray levels, use imhist().

[Jhilam Mukherjee]

yes, pdf of gray levels

[Alessandro Bile]

can you explain how to get the probability density function of an image in matlab once i have used the imhist() function? I tried this way:

[counts,binLocations] = imhist(image);
pdf=counts/numel(image);
figure
imshow(pdf);

 Thank you

[Image Analyst]

pdf is not an image so you don't use imshow(). It's a vector so use plot() or bar():

plot(binLocations, pdf, 'b-', 'LineWidth', 2);
grid on;

[Alessandro Bile]

Thank you for your help!