That is correct, the coordinates themselves are still in pixels in order to plot correct against the image. Computations such as centroid size, areas, and linear distances are, however, computed with the scaled coordinates.
----------------------- F. James Rohlf State University of New York, Stony Brook, NY 11794-5245 www: http://life.bio.sunysb.edu/ee/rohlf > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] > Sent: Wednesday, April 14, 2004 8:55 AM > To: [EMAIL PROTECTED] > Subject: Scaling in tpsDIG > > > Dear Group, > I'm making my first foray into 2-D data collection, and have > run up against a snag using tpsDig. The documentation states > that if one uses the Set Scale feature, the scale factor > "Also scales the coordinates appropriately". I know that I'm > in the correct mode because the Scale Factor keyword and > corresponding value are inserted in my TPS file, but my > coordinates are still stored as pixels. Have I missed > something in the program or am I misunderstanding the documentation? > > I would much prefer coordinates in mm units if at all > possible. For that matter, I would dearly love to customize > the origin the way I can for my Microscribe. I'm digitizing > symmetrical objects (vertebrae in superior view) and shifting > the origin to the midline would make it a breeze to estimate > missing landmarks by reflection. If others think these would > be useful features, perhaps we can offer a collective plea to > The Powers That Be? Cheers, Michelle > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Michelle Singleton, Ph.D. > Assistant Professor > Department of Anatomy > Midwestern University > 555 31st Street > Downers Grove, IL 60515 > > Phone: 630.515.6137 > Fax: 630.971.6414 > e-mail: [EMAIL PROTECTED] > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > == > Replies will be sent to list. > For more information see > http://life.bio.sunysb.edu/morph/morphmet.html> . > == Replies will be sent to list. For more information see http://life.bio.sunysb.edu/morph/morphmet.html.
