Hi For the last week or so I have been playing around with a perl script calling a gimp function in a directory full of ppm to be mpeg2encoded later on.
I have been trying that on various sources and every time I found the results amazing. You'll find it under Images filter Enhance Unsharp mask in Gimp. Give it a go. I have attached an before and after pict. The plugin is plug_in_unsharp_mask and described as : "The unsharp mask is a sharpening filter that works by comparing using the difference of the image and a blurred version of the image. It is commonly used on photographic images, and is provides a much more pleasing result than the standard sharpen filter". The procedure has to be fed with 3 values : Radius, Amount, Threshold. So far I export in single ppms my DV file, transform the ppms, save back into a DV file.... a pain ! On a 5 minutes stream it is not much of a big deal, but on a 280 minutes it is almost impossible. Too slow, too much ressources etc..... A good thing could be to include such a procedure into a yuv_unsharp. The bad news is..... I do not a have the very first clue how to do it. I guess I could use a template from yuv_median_filter, but then re-programming the image blurring and the comparison between the blurred image, the image and saving the result into a yuv stream...... well........... It will take me ages when it might be quite easy for some gurus of you guys. Any volunteer either to help me or to do it ??? Cheers Edouard
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