Patent ID: 6289110
Filing Date: 2001-09-11
Classification: G06K

Abstract:
An object extracting method using a motion picture, said method comprising:obtaining a difference image frame by getting a pair of still image frames separated by a predetermined time interval from a motion picture and obtaining a color image frame which satisfies color information defining a color of a particular object from one of the still image frames;performing a grid processing of a logic image frame, which is obtained from the difference image frame and the color image frame, at a predetermined grid size and obtaining connected components using direction connection information of the processed grids and defining minimum areas that each includes one of the connected components;comparing each of the minimum areas with predetermined conditions, thereby selecting the minimum areas which satisfy the conditions as object area candidates; andextracting an object by selecting and optimizing an object area candidate which has a prescribed size among the object area candidates, wherein predetermined conditions are one of the following:(1) a size of a variable RECT[i]>a threshold value of a size of the minimum area;(2) a minimum value<the row/column ratio of the variable RECT[i]<a maximum value; and(3) a density of the variable RECT[i]<a threshold value of a density, wherein the threshold value of the size of the minimum area, the minimum value and the maximum value of the row/column ratio of the variable RECT[i] are previously defined values in accordance with the object, and the density of the variable RECT[i] is a value of which the density of the connected grid components is divided by an area size of the variable RECT[i].