Image denoising using wiener filter

Dear all,

Can someone help me why this error happens shown in the picture bellow? I want to use weiner filter for image denoising but I stucked here.

Answer 1

[Walter Roberson]

The filter does not support rgb images. The great majority of jpg are rgb images even if they look gray. You should rgb2gray or filter one colour at a time.

[Takele]

Thank you very much!