Digital Image Composition and Its Object Image Compression

• Main Authors: Ming-Yuan Chen, 陳明源
• Other Authors: Jar-Ferr Yang
• Format: Others
• Language: en_US
• Published: 1995
• Online Access: http://ndltd.ncl.edu.tw/handle/22778190315082730750

碩士 === 國立成功大學 === 電機工程研究所 === 83 === In the traditional film production, the limitations of time and space will cost the film production more and lavishly. If the snapshot of actors and playgrounds can be separated, these problem can be solved by digital image composition effectively. In this thesis, we propose an image composition system ,that includes object-only shooting procedures, composition rules of images and compression method of object image. We separate the object image from the object-only shooting image by using the characteristics of background and adjust the parameter of object image by the characteristics of luminosity. Since object images are irregular, traditional methods are not suitable for compressions. By referring the direction of im- age texture of blocks, we employ the direction-oriented 1D-DCT to compress the irregular object image. By using the direction mation, we can modify the 3-step motion estimation algorithm to reduce the searching time and compensated errors.