Thanks for your responses. Here is the details I failed to mention:
Top figure:
Elastin is stained black
Bottom figure:
Collagen is stained blue
SMC is stained red
As such I am interested in finding the
ratio of elastin, collagen, and SMC in the arterial wall (which will require some cropping of the connective tissue).
Once again thank you, and I look forward to your reply!
Heather Hayenga