[Bf-committers] Patch: New compositor nodes

j.bakker at atmind.nl j.bakker at atmind.nl
Mon Aug 29 09:11:09 CEST 2011

Hi Frederic

I have checked the nodes to identify any problems with my project
(Compositor redesign). 

I don't see any issue Vibrance, the HCL nodes and having a separate gain
node. The gain function is hidden in the color balance node.
Posterize: There is just a small difference between Math round and the
Posterize node. But the math round is only based on values, as this one
also concerns colors.
I + these nodes, but we should be aware that implementing ocio in blender
will in the future change the HCL nodes.

Pixelize+ToonAA: This is more a question if these should be part of a
compositor. Perhaps someone else can answer this.
ToonAA: I see some issues as the algorithms normally are used to upscale
2x2 or 3x3 pixels and this node is tends to be implemented as a convolution

What are your thoughts about the last two nodes?

PS. in your comments you mention pixelprocessor, but don't use it. (ToonAA)


Original Message:
From: Frédéric van der Essen fvdessen at gmail.com
Date: Sun, 28 Aug 2011 17:14:22 +0200
To: bf-committers at blender.org
Subject: [Bf-committers] Patch: New compositor nodes

I'd like to get this patch reviewed:
It adds a few nodes to the compositor :

Increases the saturation but prevents clipping and oversaturation.
Video: http://frederic.vanderessen.com/videos/node-vibrance.ogv

Hue Chroma Luminance:
Adds a Hue Chroma Luminance control,separation,combination nodes.
The HCL Colorspace is similar in spirit to the HSV, but is based on the
Lab Colorspace, and gives more natural results.
Video: http://frederic.vanderessen.com/videos/node-hcl.ogv

Increases or decreases the dynamic range of the picture.

Pixelizes the picture. The size of the blocks and the method used to
pick the
blocks colors can be changed.
Video: http://frederic.vanderessen.com/videos/node-pixelize.ogv

Reduces the number of colors in the picture. Similar to Gimp's posterize

Anti-Aliasing filter for pictures with a small number of colors. Based
on the EPX pixel art upscaling algorithm.

The patch is in the tracker

You can find a Debian Testing 32bit build here

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