Is there a way in ImageJ to replace all pixels below a specified color value with another specified color value?
you could apply a procedure like:
- Set a threshold on an RGB image
- Image > Adjust > Color Threshold…
- Click Select
- Select color for filling: Edit > Options > Colors…
- To fill that selection: Edit > Fill
Thanks for your response. However, I see that in the threshold tool you are only able to select generic colors like black, red etc. Is there a way to threshold with a specific color value?
No, but think of the colors in the dropdown as means of visualization for a moment. If you, however, click the Select button, the thresholded region will be shown with a yellow (at least that’s the default color) contour. With steps 2 and 3 mentioned above, you can fill that selected region of interest with any (foreground) color that you like.