METHOD AND APPARATUS FOR IMAGE ENCODING BASED ON REGION CHARACTERISTICS, METHOD AND APPARATUS FOR IMAGE DECODING BASED ON REGION CHARACTERISTICS

摘要

PURPOSE: An image encoding method based on a local property and an apparatus thereof, and an image decoding method and an apparatus thereof are provided to perform encoding/decoding according to a determined image format and a coding mode by analyzing the property of the area of an image, thereby improving coding efficiency and performance for an image in which a synthetic image and a natural image are mixed according to the area. CONSTITUTION: An image encoding device determines at least one of an image format and a coding mode according to the area of an input image (1010). The image encoding device determines the conversion of the image format of an input area image based on the determined local image format (1020). The image encoding device encodes the input area image based on the determined local image format and the coding mode (1030). [Reference numerals] (1010) Determine an image format and a coding mode according to the area of an input image; (1020) Determine the conversion of the image format of an input area image based on the determined local image format; (1030) Encode the input area image based on the determined local image format and the coding mode; (AA) Start; (BB) End