Visual detection system and method for filter

The invention relates to a visual detection system and method for a filter. The visual detection system comprises an image acquisition module, an image processing module, a detection module, a data management module and a signal control module, wherein the image acquisition module is used for photo sampling of a filter to be detected; the image processing module is used for performing white balance treatment on the filter photos; the detection module is used for selecting a qualified filter photo as a standard sample and comparing the standard sample with other filter photos to identify product defect types; the data management module is used for receiving, storing and displaying defect information, and meanwhile, generating a warning signal and a waste processing signal; the signal control module is used for input and output control of signals, signal filtering and denoising and/or abnormal signal interference screening. As a machine is adopted for detection, not only is the labor intensity of workers reduced, but also the detection speed and the detection precision are high, the detected products are reliable in quality, and quality management of cigarette material plants is greatly assisted.