[理学]DIP-Lecture7图像编码2-运动图像压缩概念motion image compression数字图像处理.ppt

6 Motion Picture Compression The need for compression The need for compression 帧内压缩 运动检测 Motion estimation Block Matching Techniques Matching Criteria Matching Criteria (cont.) Fast Search (Reduced Search) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Fast Search (Reduced Search)(cont.) Analytic Methods（解析法） Analytic Methods（cont.) Discrete Approximation Discrete Approximation(cont.) Recursive Methods（像素）递归法 Recursive Methods递归法 Recursive Methods（cont.)递归法 Recursive Methods（cont.)递归法 Effectiveness Of RecursiveMC Effectiveness Of RecursiveMC Effectiveness Of RecursiveMC Interframe Coding Interframe Coding Motion-CompensatedCoding Motion-CompensatedCoding (cont.) 6.15 Motion-CompensatedInterpolation Model-Based Image Coding Model-Based Image Coding Facial Expression Synthesis Facial Expression Synthesis(cont.) Object-Oriented ImageCoding Object-Oriented ImageCoding Block Diagram Image Analysis/Synthesis 2-D Model: 8 parameters per object for motion and position Image analysis: Hierarchical STAGE 1: One object for the entire picture STAGE 2: Detect change areas and may divide an image to several objects STAGE 3: Detect small moving objects inside larger ones STAGE 4: … Image Analysis/Synthesis(cont.) Image Analysis/Synthesis(cont.) Bit Rates vs. Complexity （MUSMANN et al, “Object-oriented analysis-synthesis coding of moving images,” pp.117-138, Image Commun, OCT 1989） －Divide each image into moving objects, and encode 3 sets of parameters defining the （1）MOTION , （2）SHAPE , and （3）COLOR information of objects. 基于对象的编码 （MUSMANN et al, “Object-oriented analysis-synthesis coding of moving images,” pp.117-138, Image Commun, OCT 1989） －