Deoldify Vapoursynth filter

[Dan64]

The new dev version seems Ok.

I attached the new RC3. In this update I added another combination method called Chroma-Retention as described below

:param CombMethod:          Method used to combine coloring models with (+):
                            Allowed values are:
                              'Simple' (default)
                              'Constrained-Chroma'
                              'Luma-Masked'
                              'Adaptive-Luma'
                              'Chroma-Retention'    <--- NEW METHOD

The problem of finding a way to stabilize the DDcolor family models is very difficult.

You can find an example here

 

As you can see DeOldify is the one with more stable colors, and compared with the others is stable like a rock.

The problem is that even DeOldify isn't perfect. In the picture above the patient's legs (near the stretcher) are gray in DeOldify, while DDColor and ECCV16 were able to colorize them, but at cost of grater color instability.  

In this link you can find the sample colored with the 4 models supported by HAVC: https://archive.org/details/young-franke...720p.-test
You will see that the colors instability of DDColor, ECCV16 and Siggraph17 is terrifying.

So the problem is: it is possible to stabilize DDColor, ECCV16 and Siggraph17 and at the same time to retain the colors ?

In this case it could be possible to use these models to improve DeOldify.

The HAVC filter attempts to solve this problem. 
The problem isn't fully solved yet, but this RC3 represents a small step forward in solving this complex issue.

I hope that you have time to add the new combination method.

Thanks,
Dan