適合網(wǎng)絡(luò)傳輸?shù)脠D像小波編碼


頁(yè)數(shù)：5 字?jǐn)?shù)：3646

適合網(wǎng)絡(luò)傳輸?shù)脠D像小波編碼

【內(nèi)容提要】本文對(duì)SPIHT算法進(jìn)行了以下三方面改進(jìn)：1)每次分級(jí)量化前都重新初始化LSP，LIP，LIS；2)對(duì)最低頻子圖進(jìn)行單獨(dú)的無(wú)失真編碼和傳輸；3)其他子圖都從第三閥值開(kāi)始編碼和解碼。使算法增強(qiáng)了抗誤碼性能，并提高了壓縮比。
【關(guān)鍵詞】圖像壓縮，小波變換，零樹(shù)編碼，抗誤碼，圖像傳輸
【Abstract】In this paper, the writer develops SPIHT in three ways: 1) 1) Initial LSP, LIP, LIS before the quantization of every step. 2) Undistorted code and transmit the data of lowest frequency after wavelet transform. 3) Code and decode the remained data from the third biggest valve. These developments improve the resilience and compression ratio of the algorithm.
【Keywords】Image compression, Wavelets transform, Zerotree coding, Resilient, Image transmission
【教師點(diǎn)評(píng)】針對(duì)SPIHT算法中的碼流相關(guān)性問(wèn)題，作了以下三方面的創(chuàng)新性改進(jìn)。1)每次分級(jí)量化前都重新對(duì)LSP，LIP，LIS初始化，從而極大地減少了前端誤碼對(duì)后續(xù)碼的影響，提