Problem 2: search space is HUGE Like finding needles in a haystack Slow(many patches to examine) Error prone(classifier must have very low false positive rate) eed to search over x y locations nd scales s 10,000 patches/object/image 1, 000,000 images/day Plus, we want to do this for 1000 objectsProblem 2: search space is HUGE x 1,000,000 images/day Plus, we want to do this for ~ 1000 objects y s positive rate) “Like finding needles in a haystack” Need to search over x,y locations and scales s - Error prone (classifier must have very low false - Slow (many patches to examine) 10,000 patches/object/image