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Let's say I have a picture of an insect wing and a ruler on the same image. Is there any computer program that I can use to calibrate with the ruler and then get a measurement on the wing length? Would the software be able to export these data to a spreadsheet?

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2 Answers 2

up vote 9 down vote accepted

ImageJ is all you need. Particularly see the documentation sections on setting the image scale and measuring.

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This is great! Thanks! It even continues to add values from new images into the table. Awesome! –  Atticus29 Sep 11 '13 at 17:57
    
see also Fiji for a distribution of ImageJ with more plug-ins –  Michael Kuhn Sep 12 '13 at 11:28

WebPlotDigitizer is an online application that can also be used to make distance and angle measurements in an image.

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Looks interesting. I will try it at the next chance. –  Chris Jun 24 at 10:32

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