AP when training with SVM

[meirpr]

I have completed all the steps of Part1 using 2000 ROIs. However my AP's for the classes are much lower than written . They should be:

but I get:
Number of rois before non-maxima surpression: 1583
Number of rois after non-maxima surpression: 137
Evaluating detections
AP for orange = 0.1364
AP for eggBox = 0.0341
AP for joghurt = 0.1364
AP for ketchup = 0.2727
AP for squash = 0.3455
AP for mushroom = 0.0000
AP for water = 0.0227
AP for mustard = 0.0000
Mean AP = 0.1185