Probelm in implementing Adaptive Histogram Equalization

Hi,

I am trying to implement Contrast Limited Adaptive Historgram Equalization an image using the command adapthisteq(I) but i am getting error like

"Error using adapthisteq

Expected input number 1, I, to be two-dimensional."

I have attached my image here, can anyone pls guide me the problem with it.

Note: since the file format of tif is not supported in the attachment, therefore i am attaching jpg format of my file.

Thanks

[Stephan]

What shows up for

size(I)

[Ghulam]

This is the result

ans =

1728 1852 4

Answer 1

[Stephan]

Follow the workflow shown here:

https://de.mathworks.com/help/images/ref/adapthisteq.html#bvhtu1_-1

[Ghulam]

Thanks Stephan,

I also think that the issue is of dimensions, when i have converted the image into Gray image. there was no error and i was able to apply the CLAHE.

Answer 2

[Image Analyst]

Before calling adapthisteq(), cast the image to gray level if it's not already:

if ndims(I) == 3
    I = rgb2gray(I)
end