Recording Images in .Net application (Windows based)

My Settings:
> Web Browser
- Web Business transaction
> Record settings - Application type: 'Custom type'
Protocol: TCP/IP

When I do some operations in a window which has some images on it, Silkperformer records the images in text format (garbage values) under WebUrlPostBin.

execution will impact if this is parameterized. So, Is there any way where we can ignore the images or have a regular experession or somethin...