I am recently been asked to figure out a way to measure nest concealment using data that was collected prior to my position. They have years of data where photographs were taken of a sphere placed where a nest would be on the ground and then took a photograph of the sphere. The idea is that the sphere is similar to a bird on a nest and they want the percent vegetation cover over that sphere.
Does someone know of a program (preferably free and relatively easy to use (at least once it is set up) so technicians can continue to use it in the future) available to run many of these calculations? We would prefer something that can a) detect the sphere and b) calculate the percent cover. I assume I will need to train the program but I do not know where to begin (I know how to manually do these measurements but we have far too many to count superimposed squares on every photograph).
Thank you.
Amanda R. Goldberg
Not 100% sure what you are trying to get out of the images but I would recommend looking up a program called ImageJ. Its free and there are lots of tutorials on doing pixel counts as well as batch processing.
Last year I got to attend the Maricopa NSF workshop where they showed how to determine biomass coverage from images and then be able to apply the same technique to multiple image sets. Please feel free to contact me if this seems like something that may work. Ill try finding the tutorial they gave us.
Ian
Dear Amanda,
If I understand your question, you need free programm for analysis of hemispherical (or fisheye) photographs. There are several available on the web, one of the most often used is Gap Light Analyser
https://www.caryinstitute.org/science-program/our-scientists/dr-charles-d-canham/gap-light-analyzer-gla
Best regards,
martin
Dear you can visit RG for me ,so I written for this subject and meet to our idea
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