detect object in image,how they did it. I think it is unbelieveable

Question

alt text http://pascallin.ecs.soton.ac.uk/challenges/VOC/voc2007/examples/person_06.jpg alt text http://pascallin.ecs.soton.ac.uk/challenges/VOC/voc2007/examples/dog_08.jpg alt

Answer 1

The algorithm was published.

And you can redo it yourself, if you do have your Math skills sharp enough.