using color range tool and eyedropper to select specific color to read as black or white

SG
Posted By
stephanie_greco
Aug 3, 2004
Views
173
Replies
1
Status
Closed
Hi,

I am processing medical images. I have ditigal images where a piece of tissue has been dyed. My goal is to eventually determine the perecent of area dyed using thresholding but first I need to covert the images into two colors only. I want these to be black and white. However, since the color on my image is not in a block I can’t simply select the area and fill it it in with the appropriate color. I want to select a sample of the color in this case purple and use the eyedropper and then color range to "see" this color as black. On a test image I follow this procedure and click on color range, greyscale, and get the image I want on the preview, but when I press ok, my image remains in color. How do I convert the color range image I see on the preview into the actual image. Or is there another way to do this? Please help, it is inaccurate and tedious for me to attempt to circle and fill with the naked eye every area that is purple. In plain words I want to covert a specific range of pixels into black and leave the remaining background white.

I would appreciate any tips as soon as possible.

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GA
George_Austin
Aug 3, 2004
Stephanie,

Make your selection via Color Range. Then fill the selected area with black, invert the selection, and fill the inverted area with white.

George

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