[OpenLayers-Users] Brightness/Contrast Modifcation?

[Toni7]

Hello all,

I am trying to display a map with openlayers but also provide
brightness/contrast sliders for the
user. I managed to implement a working demo for HTML5-Canvas with a static
image (without OpenLayers). 
My question is now if it is possible to use an OpenLayers-Canvas-Layer for
that as well.

Perhaps someone looked already into this and can give me a pointer?

Thank you,
Toni
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