What software can make measurements in my pictures?

October 12, 2008 7:28 AM

Is there any good free software for putting a coordinate system on an image and extracting positions of objects?

I have a lot of pictures, each of which contains a few crosses and some lines, and I'd like to determine the positions of the lines with respect to the crosses. The magnification and rotation of the images are not known in advance.

Ideally, I would import a picture, put a cursor on each cross and tell the program that they have coordinates (x1,y1), (x2, y2) and (x3,y3). Then I would place cursors on the endpoints of a line and the program would tell me what coordinates those endpoints have.

Do you know of a free program that does this?

posted by springload to Computers & Internet (4 answers total)

I've used GraphClick for something like this before. The free limited version might be enough, or the full version is only $8.

And it's Mac OS only, did you need windows software?
posted by theyexpectresults at 8:13 AM on October 12, 2008

Response by poster: Oh, and I forgot to say that I need something for Windows.
posted by springload at 10:25 AM on October 12, 2008

Are these raster versions of maps? If so, something like QGIS can georeference these images.
posted by scruss at 1:37 PM on October 12, 2008

Response by poster: scruss: No, they're microscope pictures.
posted by springload at 6:33 PM on October 12, 2008