Macro for automated intensity measurements

[adamprice1]

https://digital.bsd.uchicago.edu/resources_files/Basic%20image%20quantification.pdf">https://digital.bsd.uchicago.edu/resources_files/Basic%20image%20quantification.pdf


I am new to imagej and need some advice/direction. Is there a macro developed that can automate the second portion of the attached document link? The portion needing to be automated is "To Quantify Gray Levels for Each Object in Images with Multiple Objects." Thanks.