I would suggest creating a look up table as a texture, feed that in to
a CIKernel, and have it map the r/g/b vales to the r/g/b values of the
original image, something in GLSL like:
// define our rectangular texture samplers
uniform sampler2DRect tex0;
uniform sampler1D tex1;
// define our varying texture coordinates
varying vec2 texcoord0;
varying vec2 texcoord1;
void main (void)
{
vec4 inputColor = texture2DRect(tex0, texcoord0);
vec4 colorout;
colorout.r = texture1D(tex1, inputColor.r).r;
colorout.g = texture1D(tex1, inputColor.g).g;
colorout.b = texture1D(tex1, inputColor.b).b;
colorout.a = inputColor.a;
gl_FragColor = colorout;
}
On Jan 15, 2008, at 10:10 PM, David Giovannini wrote:
Hello,
Let me describe what I am trying to do a little better than before.
Every avenue I try comes up short.
My daughter got a LEGO Mosaic set for Christmas. I am working on a
pattern maker application using QC. I have the pixellating and LEGO
impressions all working. The mosaic set comes with 12 colors where
three are black, dark gray, and white. I need to have the colors in
the resulting image limited to the 12.
I keep trying to solve this problem using core image kernels and not
getting the results I am looking for. I keep looking for "grayish"
and attempting to find either the correct color or the correct gray.
There is nothing linear about the LEGO colors and "grayish" is very
subjective
Given a set of 12 arbitrary colors, with fixed HBS, how would I
color match an image?
Any thoughts would be appreciated.
Cheers,
Dave
On Jan 13, 2008, at 12:40 PM, Stephanie Giovannini wrote:
Hello,
I am nearly done with a composition but I am stuck solving a color
matching problem. I want to apply a palette of 12 fixed colors
(intensity, luminosity, saturation, etc all predetermined) to an
image. The palette includes 3 greys. ColorMap seems to be close
but not quite.
What should I be using?
Cheers,
Dave
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected]
)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/dsjove%40mac.com
This email sent to [EMAIL PROTECTED]
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected]
)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/doktorp%40mac.com
This email sent to [EMAIL PROTECTED]
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Quartzcomposer-dev mailing list ([email protected])
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com
This email sent to [EMAIL PROTECTED]
