| Something like this? It's contrast with bias - you stretch the colour curve, but it's biased about a variable point instead of the centre.
Chris
|
Super contrast.qtz
Description: application/quartzcomposer
On 2 Mar 2011, at 00:09, George Toledo wrote: I haven't looked at the samples (err, maybe I should be for chiming in), but assuming you have some kind of heavy threshold effect that degrades image because of smoothstep or something similar but don't want that to be your final image, you could always use that threshold processed image to create the mask by which you threshold stuff out of your original image. As you state, you wish to keep gradient of original source.
So, you would use the overt threshold filter to turn every pixel that's below or above a certain threshold the color alpha. Then you would use a compositing mode that blends the alpha back on top of your source, thereby chopping out what you don't want. I'm not sure what mode that is off hand, but I know it's in there.
There's a chromakey filter in the apple developer reference library that might not be 100% what you're looking for, but is highly related. On Tue, Mar 1, 2011 at 6:45 PM, Oscar 'offonoll' <regoffon...@gmail.com> wrote:
Thank you for your answer. The idea is to maintain the gradient based on the image source.On my sample, the slim sprite is the original source and adding the other two objects I create the gradient. I also tryed to use two color control patch in a row and got some similar effect but would be nice to have in CI.
:) Best!
Hello Oscar,
I am not sure if I understand your needs completely. Is it some kind of threshold you are searching for? I wrote a little CI Filter for this and put it into your composition:
best,
Achim Breidenbach
Boinx Software
On 01.03.2011, at 18:39, Oscar 'offonoll' wrote:
> Hello List!
> I am looking forward for a CI super contrast filter similar to my composition. I got two low different grey and I would like to get white for the lighter grey and black for the lowest = super contrast
> Is it possible to make it in one CI ??
>
> Thank you!!!
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