Patent ID: 7184593

Claim:
A method of detecting local features of a video, comprising: extracting static images from a video made up of a plurality of consecutive static images; calculating a plurality of different feature quantities of each of the static images, the feature quantities relating to a flicker scene of the video; calculating respective differences in the feature quantities between the static images and their preceding or subsequent static images; detecting static images constituting the flicker scene according to the respective differences in the feature quantities between the static images and their preceding or subsequent static images; registering the detected static images in a list; extracting a first static image registered on a top of the list; extracting a second static image registered after the first static image in the list; determining groups to which the first and second static images respectively belong based on image detected time of each of the first and second static images and a predetermined value to register the static images to the determined groups; classifying the static images constituting the flicker scenes in each of the groups into subgroups according to a flicker frequency of the flicker scenes and a predetermined threshold value; and displaying the static images belonging to respective groups with the feature quantities by which the static images are detected on respective areas on a screen with emphasis added based on result of the classifying.