On Sep 26, 2008, at 10:04 AM, Christian Klotz wrote:
Hi,
I'm trying to scan an image for existence of a given color. So I was
wondering what the most performing way is to achieve this goal.
Take a look at the "vImage Programming Guide" and the associated
reference. vImage contains several APIs to do histogram generation.
I'm sure one of them will be just perfect for you.
Basically I want to find out which amount of the given color that
image has.
Furthermore, are there ways to find all regions of the image having
the color? So it would be easy to show the user which parts of the
image are matching.
Have you taken a look at any of the Core Image filters? Perhaps
something like CIColorCube or one of the compositing filters might be
what you need to highlight the region of a selected color.
additionally, if you can't find what you need, you can always write
your on custom filter using the Core Image Kernal Language. (for more
info, see the Core Image Programming Guide)
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