color correction on live input

[cybernatic]

hi

i would love to know how to do color and brightness/contrast corrections on a live input texture.

and also if possible to do the same corrections on just a part of the renderer output, for example just the top right.

thx

[Joe Styles]

Hi, yes tricky one as there is no direct control on the live video texture. The way I have manipulated a live video texture in the past is to put it through a render target and that you have some control over the render of it. On the texture node when you render it again you can adjust the shading in a custom way or you can stick other layers in front of texture node etc when you render it.

To adjust one part of an image you will need to split it up into sections and render it on each surface. You can use the same texture across all surfaces to help performance but you will need to use a separate mapping so the texture fits each surface.

Hope that helps!

[Joe Styles]

Just thought.. you can also do some colour correction with the matrix nodes, for example you can use the Texture Mixer to adjust RGB:

[Götz_B]

For color correction on a part of the output, you can split your output in the RenderSetup and use the ShapingTool.