AviLine logo AviLine Analysis

screendump of action tools The first two tools are used to mark the first and last frame for analysis, and the green tick tool to start analysis

Analysis: Two measures of movement are analyzed. Both methods report the difference between successive frames.
  1. For each frame, the difference in position  of the first light/dark interface is determined. The measurement can start either at the light or dark end of the line (Menu Options | Begin at ...). A value of -1 indicates no interface found.
  2. The mean square of the differences in intensity at each pixel along the line is  calculated
Comparison of methods:

Help Index Page written by Chris Elliott (biol75@york.ac.uk) 29 Sept 05