Measuring leaf or algae blade area in a digital photo with ImageJ
August 12, 2011
Tags: algae, Analyze Particles, area, ImageJ
The following is a tutorial on using the freely available ImageJ program from the National Institutes of Health for estimating the area of a leaf or algae blade (or anything else). The process is straightforward once you understand the various steps.
You must begin with a photograph of your object, flattened and dried off as much as practical. Include a clearly visible ruler or other measuring device in the picture. Ideally you will photograph your dark leaf or blade on a light background to maximize the contrast between the object and the background.
[caption id=”attachment_1009″ align=”aligncenter” width=”300″ caption=”The original picture, … Continue Reading