Classifier generation method and device, classifier updating method and device, object detecting method and device, and image processing equipment

The disclosure relates to a classifier generation method and device, a classifier updating method and device, an object detecting method and device and image processing equipment. The multi-class classifier generation method comprises the following steps of using a one-class object classifier and obtaining a background image area in an image sequence to generate at least one one-class background classifier; and combining the one-class object classifier and the at least one one-class background classifier into a multi-class classifier.