Efficient Improvement for Adaboost based object detection

Object detection by the traditional Adaboost algorithm is very time-consuming :mainly because the candidate feature number is large, and the feature number in the final strong detector is large. So this paper elevates 3 efficient optimization techniques and implements to reduce the training time. First we use some preprocessing technique to reduce the candidate features size to ten percent of the original, and then we use some implement skills to further reduce the training time. Besides these, we use double thresholds to describe each feature, which can improve the efficient of each feature, and reduce the required feature number for the final strong classifier. the experiment result show that the training of our system is hundred time faster than previous systems.