Line Scan and Removal

[PyPK]

i I need some help on some problem I am trying to think of.

are there any algorithms available to do the following If not, any
ideas?:

I would like to Identify any lines of any orientation and width in an
Image and
remove them from the Image. Basically I would like to scan the entire
Image for lines and remove them.

so for example if I have an Image with a circle, a triangle and a line.
Then my resultant Image should only have a circle.

Can some one help me think through this process...

Thanks