Adobe Photoshop/photoshop question
I am a researcher and looking for a simple way to figure out a problem. My project is essentially figuring out how much algae is eaten off by fish, so I have many pictures of tiles made up by yellow holes where fish bite from and green parts where algae still remains. I was hoping there was a way on photoshop to get a percentage of the spots that are yellow compared to spots that are green, otherwise just a way to make the two colors more distinct as some photos come out blurry. If you have a solution to my problem, I would forever be in your debt!
Photoshop will not be able to do the calculations for your percentages. Sorry.
If you can redo the study with a red or pink tile you may have better results. A black or white tile would also be preferable to yellow. The problem is that yellow is right next door to green in the color spectrum, so it will be hard to separate them in this photo.
But if you have to use these shots, you can try the following steps...
From the top menu choose - [Select]-[Color Range]. Fiddle with it until you have the algae selected then fill it with a new color, or better yet put the selection on a new layer (ctrl + J) and apply a Layer Style (Color Fill would work well) to the new layer.
I hope this helps.
If you don't know what a Layer is or a Layer Effect is you should buy a book on Photoshop, or do some serious Googling.