I know what Chroma filters are. I'm a software engineer. I'm glad you had good luck with that correlation vs direct visualization. However I wouldn't trust it with only anecdotal data. I could come up with more confounding factors but it's not important. I'm glad it worked for you.Well I guess everybody think its just a pretty picture that I posted.....
However...this is how i checked my trichomes even though i have a portable microscope and jeweler loupe. Needless to say, I have verified this method with my microscope and I have high confidence that this method is accurate. You can check it yourself when your loupe comes in.
Just an FYI to everybody...chroma is different from just color saturation.