I am working on a research project in clinical medicine part of which requires mapping of the points on one 2-D body image to the corresponding points on a second differently shaped 2-D body image.
As part of our project (written in C++ and MatLab) our team has written MatLab code that displays two TIF images of a human body on a computer screen and allows a user to click on a point on each image in succession to identify a common anatomic landmark in each image. We will thus collect data on, say, 30 landmark pairs, some along the outline of the body and some inside the outline. The next steps will be to: 1. Map the pixels along the outline (i.e., map each pixel on the outline of one body image to a corresponding pixel on the outline of the other body image). 2. Map the interior pixels: (i.e., map each pixel inside one body image to a corresponding pixel inside the other body image). Our current thinking is to use geometric morphometric approaches to map both the outline and the interior of the images. For mapping of the outline, we had originally thought we would just map the outline pixels according to the proportional distance between two common landmarks on the outline (e.g., map the pixel 10% of the way along the outline from Landmark A to Landmark B in image 1 to the pixel 10% of the way along the outline from Landmark A to Landmark B in image 2). However, it seems that Booksteinss sliding semilandmark method might be a superior approach. We had then thought to use the original user-specified common landmarks together with the calculated common pixels along the outlines as the basis for a thin-plate spline interpolation (or similar interpolation technique) to map pixels on the interiors of the body images. I would welcome any recommendations as to the best way to do the mapping. In addition, if anyone with mapping expertise in a MatLab setting would like to join our team, we would be most interested some funding support can be provided. Colin R. Taylor, M.D. [EMAIL PROTECTED] _________________________________________________________________ Fast. Reliable. Get MSN 9 Dial-up - 3 months for the price of 1! (Limited-time Offer) http://click.atdmt.com/AVE/go/onm00200361ave/direct/01/ == Replies will be sent to list. For more information see http://life.bio.sunysb.edu/morph/morphmet.html.
