how to remove spot from an image.?

i want to remove the black spot with character L.

so i want write a piece of code which help me to find this spot and remove it.

bcz i have lots images and want to filter.

Answer 1

[Constantino Carlos Reyes-Aldasoro]

You should look for the extreme values of the intensities. The dark regions of the image are not as dark as the circle, so find the lowest values and those will correspond to the black. Use some morphological operators and then you will be able to select only those of the "L".

Answer 2

[Image Analyst]

What does "remove" mean to you? Do you want to crop the image? Do you want to fill it with white? Or black? Or smear in the pixels just outside of it with regionfill()?