Color/tint brightening with avisynth?

[darkdream787]

(I could be using an improper term for something so just bear with me please)

I am ripping a dvd and have written my script to fix the source up alot. So far I have been able to do everything I want to the video except one or two things. The biggest one being color shade/brightness. I have a couple pics that show what im talking about.

The first pic is mine, the second pic is another source that has the colors more like I want them to be, same with the third one.

MINE


OTHER SOURCE (notice the brighter shade of colors)


OTHER SOURCE #2 (colors are much brighter shade in this one)


MINE


OTHER SOURCE (notice the brighter shade of colors)


OTHER SOURCE #2 (colors are much brighter shade in this one)



the colors on the other sources Im comparing mine to seem to be much brighter or a different tint that looks brighter. Such as the grass and sky for example. their sky is very light blue and the clouds dont show as much detail as mine. The grass on theirs is much brighter green as well. I wish to brighten the shade of my colors to something similar like theirs.

If you look at the brown on the guys armor in the bottom third one it looks like a different shade of brown all together because of the brighter shade of colors.

Ive tried playing with saturation using tweak(sat=???) to increase it but it only adds color making it too strong, not changes the shade or brightness of it. I tried tweaking the brightness and contrast as well bu it just made my image more white looking than I wanted it.

anyone know what filter I should try out?

[poisondeathray]

Ive tried playing with saturation using tweak(sat=???) to increase it but it only adds color making it too strong, not changes the shade or brightness of it. I tried tweaking the brightness and contrast as well bu it just made my image more white looking than I wanted it.

anyone know what filter I should try out?

That is what you want to change: tweak(sat=??, hue=??, coring=false) . Hue will shift the colors (maybe you wanted the shirt more red , or more orange - you can use +/- values) . Sat refers to saturation or intensity of colors

The other pictures have different levels: the black level is elevated. You can change it to match the others if you want using levels() , but I wouldn't. Yours' looks fine , but it's slightly oversaturated already, but at least the Y' levels are ok. The other 2 look bad (wrong levels, way oversaturated so far that even details are missing like the lines in the sirt)

[poisondeathray]

Actually, looking a bit closer, you've clipped some of the channels in the RGB screenshot. Notice in the 2nd series of pics, that the vest shows a blue patch, but it's missing in yours? - you've crushed and clipped the blue channel on the low end. It's important to remember we are looking at RGB screenshots, not the actual YCbCr video

The differences are non linear - so you won't be able to get it to match very easily in avisynth. You can make some adjustments, but clipping is irreversable. You have to go back to original source to see if that data is still there. Maybe if you posted an unfiltered video sample we can give you better ideas

[darkdream787]

Actually, looking a bit closer, you've clipped some of the channels in the RGB screenshot. Notice in the 2nd series of pics, that the vest shows a blue patch, but it's missing in yours? - you've crushed and clipped the blue channel on the low end. It's important to remember we are looking at RGB screenshots, not the actual YCbCr video

The differences are non linear - so you won't be able to get it to match very easily in avisynth. You can make some adjustments, but clipping is irreversable. You have to go back to original source to see if that data is still there. Maybe if you posted an unfiltered video sample we can give you better ideas

I didnt cut anything out to my knowledge, thats how my dvd source was without the blue. All I did to the screenshot of mine was crop the black bars off sides, denoise and antialias it then sharpen it a little bit. Thats all that was done to my source in the screenshots of mine.

That third sample came from a whole nother dvd set release than mine thats probly why their different. Mine was original releases, that third came from a set called dragon boxes. Dragon boxes were colored differently, they have more picture on top and bottom as well. Their not the exact same frame either but close enough.

I mostly just wanted to achieve the brighter shade of blue for sky and green for grass like those 2 have. mines grass and sky seems real dark compared to the other 2 when unaltered.

[poisondeathray]

Well that explains it , they are different sources. It's harder to make adjustments with a clipped source - you're missing data . Also note, even your original video should have more data than what the screenshot shows (some of the data is clipped by taking the screenshot - RGB only contains a fraction of what YCbCr can contain)

You can do secondary color correction , but it's difficult to do in avisynth, easier to do in other programs. If you shift colors or hue globally, the other colors will distort. For example if you like the skin tones as they are now, it won't be possible to use a global filter otherwise you will affect those areas as well. That's what secondary color correction is - you alter only specific areas or colors or hues. In avisynth, you do have limited control with tweak() using starthue and endhue - so you can narrow in on a specific range of colors see the examples:

http://avisynth.org/mediawiki/Tweak

[darkdream787]

First and second are same sources, that second one is just someone elses encode that I was comparing to my dvd rip. The third one is what was a different source.

I played around with the hue and saturations and got exactly what I wanted. Thanks for the tip about hue, I didnt even know that was a parameter for tweak.

That second source has ALOT of saturation and has been brightened. I was using sat=1.08 on mine, I get it like the second pic when I make it 1.40. I didnt increase my brightness any, I get it just like the second one when I make it about bright=12. the colors look like the second one as well when I added hue to the tweak and changed hue to 5. those 3 made it almost 100% identical to the second source.

Thats too much saturation for my liking to get that result. Ill just use lower settings.

In the end I got what I want, thanks for the assistance

[darkdream787]

Heres the ending result I ended up picking. Any suggestions?



sat=1.08 bright=1.8

[darkdream787]

TOP = UNALTERED (only resized and cropped)
BOTTOM = FIXED

Do you think I made it a bit too bright?

[Alex_ander]

There is a more advanced version of AviSynth's Tweak(): SmoothTweak function of SmoothAdjust plugin. It internally works in 32 bit (lesser artifacts) and has two separate hue parameters.
http://forum.doom9.org/showthread.php?t=154971