Help calculating "redness"

[emjohnson13]

I am currently involved in a project in which I am supposed to find a way to calculate and compare the "redness" of male ornate box turtles during mating season. However, I am new to using ImageJ and have not found a good way to obectify "redness", although I am certain it is possible. My advisor for the project advised using CIElab color space.

I have downloaded several plugins, such as Color Counter, Color Transformer, and RGBtoLab, but have not yet gotten any good leads.

Any sort of help, even a point in the right direction, would be much appriciated! Thanks.

[emjohnson13]

Never mind, figured it out. The Color Transformer plugin to Lab, then to the "a" image, then sectioning off the areas of reddness, and creating a histogram to get a mean a value. Easier than I thought!