Method of image processing and device thereof

PURPOSE: An image processing method and an apparatus are provided to detect a target object simply and accurately by using only depth information. CONSTITUTION: An image processing device obtains the depth information of an image and separates a first ROI(Region Of Interest) of a target object existence region from an image(S11,S12). If a candidate region of the target object detected from the first ROI corresponds to the target object, an apparatus uses the candidate region in order to detect a target region(S13-S15). The apparatus estimates the posture of the target object by using the target region(S16). The apparatus models the target object(S17). [Reference numerals] (AA) Start; (BB) No; (CC) Yes; (DD) End; (S11) Obtain depth information of an image; (S12) Separate a region of interest(ROI); (S13) Detect a candidate region from the ROI; (S14) Candidate region matched with a target object?; (S15) Detect a target region using the candidate region; (S16) Estimate the posture of the target object; (S17) Model the target object