Method of object detection and training method of classifier in hierarchical object detector

The present invention discloses a method and system for object detection, and a training method and system for hierarchical object detector in the classifier. Wherein the object detection method comprising: an input image pre-processing of the S different scales the image to be detected, wherein S is greater than or equal to 1; hierarchical type of each object detector detecting a position of said image is to be determined If the current position by the current layer, then proceed to the next level determination; otherwise, that the current position is not a position to be detected candidate image; wherein each classifier in the determination procedure comprises: extracting the to-be the respective characteristics of the particular sub-regions of the texture image are detected; calculating the output characteristic of each specific sub-regions corresponding to the partial sub-classifier according to the texture feature of each; according to the output characteristic is determined whether the current position with the current layer. The present invention can improve the speed of the object detection and object detection to obtain better results.