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Pixel Count
I am photographing given points along an artificial stream bed and want to document algae growth over time. There may be up to 7 different shades of green (algea) in a given photograph. Can Photoshop produce an accurate pixel count of each shade? I would really appreciate a step by step solution if you know of one. The magic wand tool does not appear to very reliable for this quest.
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2 Replies
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You could use select color range with Fuzziness set to zero to sample the color you want to count. The use the Histogram Panel to get a count. Mouse over the Histogram to get the count at a specific level. You may want to limit the Channel to which ever one works best ie the green channel.
Mike Shaw
Photoshop QE -
Mike.. you have too much time on your hands…. =)
See you in Boston?
Richard M. Harrington, PMP
Author: Photoshop for Video, Understanding Adobe Photoshop, Final Cut Studio On the Spot and ATS:iWork
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