For my ImageJ project, I counted the number of birds in the following image (Image Source):

I decided to analyze them as masks since ellipses did not make sense for birds. The results gave a count of 140 birds. I believe the count was lower than normal because some birds overlap.

Source:

For my ImageJ project, I counted the number of cows in the following image

(source http://sumitnagi.files.wordpress.com/2011/03/img_0435.jpg)

Strategy:

The image was reduced to 8-bit greyscale, then thresholding was done by using Image > Adjust > Threshold. Finally, the birds were counted by by doing Analyze > Analye Particles. I decided to analyze them as masks since ellipses did not make sense for birds.

Data

Count Total Area Average Size Area Fraction Mean

140 91798.000 655.700 1.3 254.577

Inferences:

The total count given after setting the image to 8-bit and doing a particle count was 140. I believe this count was under the true number because some birds overlap.