Patent ID: 8325206

Claim:
An image processing method for using a stream of drawing as an input on an image displayed by a display, comprising: identifying the input by: identifying a minimum external border of the stream of drawing according to relative coordinates of the initial point, the end point and the drawing connection points of the stream of drawing on the display; equally dividing an image region enclosed by the minimum external border into several sub-regions, wherein the sub-regions further comprise at least one center sub-region at a geometric center of the image region; identifying a first sub-region and a second sub-region where the initial point and the end point are located respectively, and a plurality of third sub-regions where a portion of the drawing connection points close to the end point are located; identifying the input as the non-closed region input when the second sub-region and third sub-regions are not adjacent to the first sub-region respectively and when the sub-regions where the drawing connection points are distributed do not comprise the center sub-regions; and performing an image rotation operation while the input is a non-closed region input.