How to select points on an image or silhouette for analysis in human gait as show below

Given a silhouette how do I select points of interest for analysis. The thesis is on using gait as a security tool in a university environment

Answer 1

[Image Analyst]

Did you ever look back at the question that you originally asked: http://www.mathworks.com/matlabcentral/answers/48987-how-can-i-select-point-of-interest-on-a-human-gait-silhouette-for-analysis