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    Distinguish dark brown from black/blue in grayscale mode

    Thanks for the tips. I'm not known with a lot of image processors and there is not a lot of scientists who have done my kind of research before. Basically chose Photoshop because I figured it would be user friendly and a method to replicate easily. I just checked out ImageJ and it looks pretty...
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    Distinguish dark brown from black/blue in grayscale mode

    Wow Tom, thanks a lot. It really works well. I think I underestimated the power of the hue/saturation tool a bit (only used the Master and then went on to 'selective color' tool). With your second photo I can get it perfectly into grayscale with the blue as total black pixels and the brown as...
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    Distinguish dark brown from black/blue in grayscale mode

    Thanks Tom, I will check it out tomorrow (no photoshop at home)! Will get back to you. Thanks again.
  4. A

    Distinguish dark brown from black/blue in grayscale mode

    First timer here, help would be much appreciated! For my research I need to distinguish blue/black dye from dark brown (soil in this case). I use Photoshop CS5 This is an example of a photo after geometric distortion and the use of lasso tool: Then I have adjusted...
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