Patent ID: 8964030
Filing Date: 2015-02-24
Classification: G06K,H04N

Abstract:
1. A surveillance camera system having a camera malfunction detection function of detecting a camera malfunction using an input image and a reference image, comprising: a reference image update unit to generate or select the reference image to be compared; a block division unit to divide into blocks, each of the input image and the reference image; an entire feature extraction unit to extract each entire feature being features of an entire image, from the input image and the reference image; a block feature extraction unit to extract block features being features of each block from images after the block division of the input image and reference image by the block division unit, wherein each block has the block features which are a luminance average and a distribution value of edge strength; a malfunction determination unit to calculate a first variation between the entire features of the reference image and the entire features of the input image, and a second variation between the block features of a block of the reference image and block features of a corresponding block of the input image, to determine the camera malfunction by using a threshold, and to output information indicating a type of the camera malfunction of at least one of an entire image of the input image that was determined to be the camera malfunction or an image of each block that was determined to be the camera malfunction; a camera malfunction classification unit to refer to a predetermined malfunction classification criterion of the camera malfunction, to classify the camera malfunction based on the information indicating the type of the camera malfunction; and an output unit to output a camera malfunction classified by the camera malfunction classification unit.