基于特定类的霍夫森林目标检测程序; Class-Specific_Hough_Forests_for_Object_Detection Class-Specific Hough Forests for Object Detection Juergen Gall BIWI, ETH Z ̈ urich and MPI Informatik∗ gall@vision.ee.ethz.ch Victor Lempitsky Microsoft Research Cambridge victlem@microsoft.com