image calibration (lut color) bar with user-defined limits?

Posted by dvor on Dec 08, 2010; 12:28am
URL: http://imagej.273.s1.nabble.com/image-calibration-lut-color-bar-with-user-defined-limits-tp3686250.html

Hello

Any suggestions as to how one might add a color calibration bar with user defined limits different than the max/min pixel intensities, so that images with different intensity ranges can be compared visually side-by-side.

I am writing a macro to
(1) calculate NDVI values from multispectral CIR image (resulting in a 32-bit image)
(2) pseudocolor the image (lookUp Table, e.g. "32_color")
(3) add color-bar ( Analyze/Tools/Calibration Bar) -- which I would like to range from -1 to +1 even if the histogram of the given scene is cropped within this range.


Can one map an arbitrary LUT range to correspond to a -1 / +1 intensity range, irrespective of the range of intensities in the image? Or is there a better way to accomplish the above?

Any help will be greatly appreciated!

Dvoralai