A method of video frame encoding using the dual object extraction and object trajectory information on the encoding and decoding process

PURPOSE: A method for compressing an image using a dual object detection and motion trajectory information in steps of encoding and decoding the image is provided to extract image information, motion information, and transformation information for an object from an encoding process, and to reconfigure a prediction frame using the motion information and the transformation information for the object extracted on the basis of a reference frame in a decoding process, thereby raising a compression rate. CONSTITUTION: A method for compressing an image using a dual object detection and motion trajectory information in a step of encoding the image includes; a step of extracting an object with separating the object and a background from a reference frame in the image; and a step of extracting the object, the initial location value and the size of a block adjacent to the object, and the motion trajectory information of the object. [Reference numerals] (AA) Start decoding; (BB) End; (S210) Check header information; (S214) Decode an I frame; (S216) Search a reference frame; (S218) Generate background information about an expected frame based on a reference frame; (S220) Check information about a starting location value (i, j) and a size (m, n) of a block adjacent to an object in the reference frame; (S222) Extract a relevant object by using information about the location and size of a relevant block; (S224) Generate an expected frame by using header information about the extracted object in the reference frame and applying motion trajectory information; (S226) Is there form deformation information about an object in a header?; (S228) Correct the expected frame by using transform information about an object; (S230) Is there correction information about a block adjacent to an object in a header?; (S232) Reconstruct block information about an error of the background around an extracted object in a reference frame of a header information reference; (S234) Perform the reconstruction for each object?; (S236) Final frame?