How do you remove Halo from video?

[Undead Sega]

How do you remove Halo from video?

for those who dont know what it is precisely, its the aftereffect u get when sharpening video and u get a white essence around the edge of objects in the image.

i dont have examples yet, but im sure u lot knwo what im talking about.

i would really appreciate it if anyone can help me on a way to fix this or to reduce it at least.

thanks.

[jagabo]

The opposite of sharpen is blur or gaussian blur.

[Soopafresh]

Dehalo scripts in Avisynth. Look on Doom9.

[lordsmurf]

There's really nothing that can be done for this. All you'll do is blur the video. At best, it will only blur the halos. But they will still exist, at least halfway or more.

Lost cause.

[Undead Sega]

there was ways of doing it, like so some feature in Photoshop, are u sure htere isnt a way similar to do for video?

and what is the DeHalo script like from AviSynth?

[manono]

are u sure htere isnt a way similar to do for video?

Soopafresh already told you. If you don't have interest enough to even search Doom9 for the answer, well...

and what is the DeHalo script like from AviSynth?

Yep, like from AviSynth.

There are a bunch of befores and afters on this page:

http://forum.doom9.org/showthread.php?p=738444#post738444

[Soopafresh]

There's even one in the fft3dfilter plugin for avisynth.

Avisynth is an script based app that processes your video and audio with very high quality filters - easily the best free filters out there, and often times better than commercial programs that cost thousands of dollars.

Conceptually, it looks like this:


Your AVI or MPEG or FLV or MP4 or whatever gets wrapped inside an AVIsynth script, which is just a text file with an .AVS extension. The simplest AVS example looks like this

AVISource("MyVideoFile.avi")
BicubicResize(720,480)


The commands above tell Avisynth to load the AVI file and to resize it to 720x480 dimensions.

Save the lines above as VideoProcessing.AVS and you can load it up in VirtualDub to view it.


Anyway, that's lesson #1. As with anything worth learning, it takes some time to get up to speed, but it is 100% worth it. You'll be able to do amazing video work. I use it all the time.

[guns1inger]

If you are getting strong halos from sharpen the image then you are over sharpening. I have some commercial discs where even the big boys have over-sharpened to the point of edge artifacts. Very poorly done.