New Logo removal filter...alpha

[MrTibs]

I've posted a new filter to remove alpha based logos. It is still pretty feature in-complete but the results seem pretty good.

Advantages:
- doesn't require any graphic editing (Avisynth only)
- operates in YUY format


Check it out here: http://www.geocities.com/mrtibsvideo/Logo_Blend.html

Comments welcome.

[Wilbert]

Your pics look very nice! Could you also compile one for AviSynth v2.5x.

Btw, is there an internal rgb32 conversion somewhere?

[MrTibs]

I'll do a 2.5 version but you could try using this filter using the LoadPluginEx filter.


In answer to your question, NO there is no RGB conversion. (Edit: No offense to anyone, I should have said that I didn't like the loss due to do RGB conversion.)

[Blight]

The problem with logo removal is that there are several different types of blending and they are not always average....

Some shows blend toward a certain contrasting color, it's especially hard to restore the original image when they blend toward a grey multi-shade logo.

[MrTibs]

I have noticed this problem with UPN. UPN changes the luma but also adds a blue tint so after the luma has been corrected, a blue shadow remains. I'll be writing a filter to deal with this kind of problem as well.

I encourage poeple to share their experiences using the filter and suggestions and/or examples on how to improve the filter.

For now, however, I'm tring (with some difficulty) to get the filter to detect when the logo isn't there so that it doesn't over correct.


So to everyone: try the filter an let me know about your results.

[jonas]

I tested the filter yesterday and it looks pretty promissing, but I get a white line on the top of the logo-region, while the rest of the logo is gone (exept of a red dot in the logo of course :)
Here an Image showing the logo: with black background, in a scene, with logoblend Mincontrastchange=0, with logoblend
http://www.heldenbrau.de/stuff/compare.tif

I am using avisyth 2.08, any Idea what's wrong?

jonas

[MrTibs]

I the first couple of lines, the logo touches the leading edge of the logo region. I.E. you need to move your logo region over a couple of pixels. LogoBlend needs at black border to the left of the logo stretching from the top of the region to the bottom.

I'll be writig a new filter for deal with that red dot.