Method for depth video filtering and apparatus thereof

PURPOSE: Depth image filtering, synthesis method and device thereof are provided to improve the image processing performance. CONSTITUTION: A depth image within a current picture by searching depth information using a plurality of color images acquired in different view points (S110,S120,S130). Filtering for the depth image is performed using a 3D combination type bidirectional filter (S140). A synthesis image is generated using the plurality of color images and filtered depth image (S150). [Reference numerals] (S110) Color image input; (S120) Depth information detection; (S130) Color image and depth information storage; (S140) Depth image filtering; (S150) Image synthesis