例句與用法

1. one of the common characters between traditional algorithms based on dct image coding is that regardless of the content of the image, they use a fixed size block to process, for example, jpeg, mpeg-1 / 2, h . 263 use constant 8 * 8 block mode . the main work of this article is to propose a sequence images compression algorithm that is based on adaptive block dividing and object to the disadvantages of the one based on fixed-size block dividing . the proposed algorithm is an image compression method, which can auto-adjust dct block size ( 8 * 8 or 4 * 4 ) according to the difference of corresponding blocks between two frames of the sequential image and doesn ’ t process any unnecessary data blocks in order to enhance coding efficiency
   傳統(tǒng)的基于dct的圖像編碼算法的一個共同特點就是:不管圖像的具體內容,采用固定的塊尺寸進行統(tǒng)一的處理,例如jpeg,mpeg-1/2,h.263均采用固定的88分塊方式,本文的重點工作是針對這些采用固定的塊尺寸進行統(tǒng)一處理的算法的一些缺點,提出了一種基于自適應分塊的序列圖像壓縮算法,該算法是一種根據序列圖像兩幀間對應塊的差別自動調整dct變換尺寸(88或44),對不必要的數(shù)據塊不進行處理,以提高編碼效率的序列圖像壓縮編碼方法,具有較高的編碼效率和較好的壓縮效果,與傳統(tǒng)的采用88固定分塊方式的壓縮編碼算法相比,性能有較大幅度的提高,在文中,作者對兩者的壓縮編碼性能進行了分析比較。