Hello Selur,
I attached the wheel of the version 3.0 that I will release this weekend.
Respect to the RC versions, I improved the descriptions of models and parameters (so please update the GUI).
I also extended the list "ddtweak_p" with 2 additional parameters: gamma_alpha, gamma_min
I discovered that a gamma value > 1.5 improves the ddcolor stability on bright scenes, while a gamma < 1 improves the ddcolor stability on dark scenes.
The decrease of the gamma with luma is activated using the new parameter gamma_alpha (if != 0).
Here a comparison:
https://imgsli.com/MjUyNjY0
Thanks,
Dan
Nice find!
Will adjust the dev version tomorrow after work.
Cu Selur
idea: Instead of adjustingthe gamma, also try Retinex. (Retinex requires an of all black bars cropped source and can enhance artifacts, so probably only interessting on already high quality sources)
![[Image: grafik.png]](https://i.ibb.co/r7qmdYW/grafik.png)
![[Image: grafik.png]](https://i.ibb.co/GkTrNSf/grafik.png)
(I used just ddcolor)
Code:
# Color Adjustment
clip = adjust.Tweak(clip=clip, hue=0.00, sat=0.00, cont=1.00, coring=True)
# adjusting color space from YUV420P10 to RGB30 for vsRetinex
clip = core.resize.Bicubic(clip=clip, format=vs.RGB30, matrix_in_s="709", range_s="limited")
# color adjustment using Retinex
clip = core.retinex.MSRCR(input=clip, sigma=[25,80,250], fulls=False, fulld=False)
# adjusting color space from RGB30 to RGBH for vsDDColor
clip = core.resize.Bicubic(clip=clip, format=vs.RGBH, range_s="limited")
# adding colors using DDColor
from vsddcolor import ddcolor
clip = ddcolor(clip=clip, model=1)
The first sample is worse than the original, while the second is better.
I had the same problem adjusting gamma, on bright images a gamma above > 2 improves the quality but on dark scenes like your first sample the quality is worse.
That's the reason why I introduced the possibility to lower the value of gamma with the luma.
In this way I can have a gamma above 2 on bright images and a gamma below 1 on dark images.
Also the contrast can impact the ddcolor output. A contrast < 1 ddcolor images are less saturated, while a contrast > 1 the images are more saturated.
I applied a small update on the filter. I will provide a new wheel later.
Thanks,
Dan
Okay, I'll adjust the dev then and upload a new version.
Here the updated wheel.
Thanks,
Dan
P.S.
The true ddcolor "stabilizer" is "deoldify" which has a network trained to work decently with movies.
DDColor is good for images but using it alone for coloring movies is too unstable.
This is the main reason why I embarked on the development of a Vapoursynth filter for deoldify.
Updated the download.
Cu Selur
No problem, will release a new Hybrid version tomorrow.
Cu Selur
Hello Selur,
sorry for this last minute change. But I decided to move the post-process "dark" filter in ddeoldify_stabilizer().
I'm planning to rework this filter, so it is better represent the parameters of this filter like a list, so that I can eventually extend this list in a near future.
Thanks,
Dan
P.S.
Attached the updated wheel