How to convert intensity color scale to concentration color scale in images in ImageJ?

Hi everyone,
Is it possible to convert intensity color scale to concentration color scale in images in ImageJ? For example, I have 8-bit image. I opened it in ImageJ and created color scale using Analyze–>Tools–>Calibration Bar. It created color scale with range 0…255. Is it possible to convert this color scale to mmol/liter color scale, for example 0…150 mmol/liter?
I will be very appreciate for any help.

You can use the analyze -> Calibrate tool to perform this conversion.

If it’s a simple function and you just need the values, you can also convert the image to 32 bit, then use one of the Process->Math functions to make a new image.

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