Measureing an area

philipp.pagel at cmp.yale.edu philipp.pagel at cmp.yale.edu
Mon Jun 14 20:35:56 EST 1999

> Thanks for that straight forward solution :-).
> At the moment I am simplifying the image in black and white. Then I measure with
> the pick-tool of Corel Photo-Paint the whole picture. The grey-value gives me a
> value of 0-255 which I then normalize to 100 %. With the help of the EM-scale I
> can determine the size of the wing.
> A friend of mine suggested to convert the picture into an ASCII-file with 'xv'
> (black-and-white) and then counting the black pixel by the command grep '255'
> datei | wc.

Other suggestion: Try NIH Image. With the threshold function you should be
able to determine the area, if I remember corrctly.


Dr. Philipp Pagel
Dept. of Cellular and Molecular Physiology
Yale University

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