Patent ID: 8085983

Claim:
A method of adjusting selected window size of an image object, applicable for tracking a target object in a video, comprising: setting a reference selected window and a variation condition; and providing a comparison means, for comparing a display range variation of the target object, the comparison means further comprising: selecting two adjacent frames sequentially as a first selected frame and a second selected frame, and enclosing the target object in the first selected frame and the second selected frame respectively with the reference selected window; calculating a coverage range of the reference selected window for enclosing the target object to obtain a calculation result, and setting the variation condition corresponding to the reference selected window according to the calculation result, wherein the variation condition is used for recording a variation trend of the display range of the target object. if the variation condition generated by the first selected frame and a previous frame thereof is the same as the variation condition generated by the first selected frame and the second selected frame, accumulating a variation times; and if the variation times reaches a threshold value, adjusting an enclosing range of the reference selected window of the second selected frame through the variation condition.