techniques to cover blocks with grain

travolter · 26th March 2013, 09:43

Hi

I have lot of low quality videos that I encoded at low bitrate in the past, and I need advice about techniques used to "cover" blocks with grain.

I prefer this technique over others (deblock/blur/etc) cause image looks more sharp and preserving more detail.

Currently Im using addgrain with seed=1 setting, but I dont know what other techniques are you using when adding grain for fake details.

Its also possible to add different grain amount to the light or the dark parts of the image?

Any advice about creative ways to use noise for detail faking will be welcome

Taurus · 26th March 2013, 22:17

Have you tried GrainFactory3 ?
It's a very customable.
I used it in the past for exactly the same scenario you mentioned.
Forgot which dependancies are needed.
But I think addgrainC is one of them.

travolter · 27th March 2013, 08:08

oh Taurus!!! thanks a lot for remember me that GrainFactory3 exist!!!
It is exactly the grain that I was looking for cover dark/bright areas.

At moment using AddgrainC and was performing pretty well if you dont abuse of the grain to cover blocks. It needs to be added in an amount where the eye almost notice the grain

Yellow_ · 27th March 2013, 09:21

hi travolter, I use MCTDmod by Taro. Possibly a bit over the top but it offers many functions including 16bit LSB/MSB modded ones. Grainfactory3 is modded in it too for 16bit use.

Sorry don't have a link but it's here of doom9.

26th March 2013, 09:43	#1 \| Link
travolter Registered User Join Date: Apr 2009 Posts: 138	techniques to cover blocks with grain Hi I have lot of low quality videos that I encoded at low bitrate in the past, and I need advice about techniques used to "cover" blocks with grain. I prefer this technique over others (deblock/blur/etc) cause image looks more sharp and preserving more detail. Currently Im using addgrain with seed=1 setting, but I dont know what other techniques are you using when adding grain for fake details. Its also possible to add different grain amount to the light or the dark parts of the image? Any advice about creative ways to use noise for detail faking will be welcome

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26th March 2013, 22:17	#2 \| Link
Taurus Registered User Join Date: Mar 2002 Location: Krautland Posts: 903	Have you tried GrainFactory3 ? It's a very customable. I used it in the past for exactly the same scenario you mentioned. Forgot which dependancies are needed. But I think addgrainC is one of them.

27th March 2013, 08:08	#3 \| Link
travolter Registered User Join Date: Apr 2009 Posts: 138	oh Taurus!!! thanks a lot for remember me that GrainFactory3 exist!!! It is exactly the grain that I was looking for cover dark/bright areas. At moment using AddgrainC and was performing pretty well if you dont abuse of the grain to cover blocks. It needs to be added in an amount where the eye almost notice the grain

27th March 2013, 09:21	#4 \| Link
Yellow_ Registered User Join Date: Sep 2009 Posts: 378	hi travolter, I use MCTDmod by Taro. Possibly a bit over the top but it offers many functions including 16bit LSB/MSB modded ones. Grainfactory3 is modded in it too for 16bit use. Sorry don't have a link but it's here of doom9.