Snake: introductory study and experiments
June 2000 through May 9, 2001:
- So far, the paper Gradient vector flow: a new external force for snake was reviewed, files
downloaded from the net, which are running under Matlab.
- The experiments have been made applying the close snake on the default images: 110.pgm and
T1sax120.pgm. The results show that there are failures with GVF that snake cannot fit the boundaries;
however, such edges or boundaries are clearly distinguishable by user.
- To verify the accuracy of this snake algorithm, a black and white image similar to the skull boundary in
T1sax120.pgm, was created and the snake fit the boundaries accurately.
- The number of iterations for GVF was of interest. For that reason three numbers were applied on
head2.pgm: 30, 80 and 150. Results show that the only difference is in the width of total arrows, showing the gradient vector
flow, which gets bigger with increasing the iteration number. There were no other results observed by applying different numbers
of iteration.
