教師資料查詢 | 類別: 會議論文 | 教師: 郭經華 KUO, CHIN-HWA (瀏覽個人網頁)

標題:An efficient spatial prediction-based image compression scheme
學年88
學期2
發表日期2000/05/28
作品名稱An efficient spatial prediction-based image compression scheme
作品名稱(其他語言)
著者郭經華; Kuo, Chin-hwa; Chou, Tzu-chuan
作品所屬單位淡江大學資訊工程學系
出版者
會議名稱Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
會議地點Geneva, Switzerland
摘要An efficient spatial prediction-based progressive image compression scheme is developed in this paper. The proposed scheme consists of two phases, namely, the prediction phase and the quantization phase. In the prediction phase, information of the nearest neighbor pixels is utilized to predict the center pixel. Next in-place processes are taken, i.e., the resulting prediction error is stored in the same memory location as the predicted pixel. Thus, the temporary storage space required is significantly reduced in the encoding process as well as decoding process. The prediction scheme generates prediction error images with hierarchical structure, which can employ the result of many existing quantization schemes, such as EZW and SPIHT algorithms. As a result, a progressive coding feature is obtained in a straightforward manner. In the quantization phase, we extend the multilevel threshold scheme. Not only the pixel intensity value itself but also level significance is taken into account. In the experimental testing, we illustrate that the proposed scheme yields compression quality advantages. It outperforms several existing image compression schemes. Furthermore, the proposed scheme can be realized by only integer addition and shift operations. Tremendous amounts of computation-saving are achieved. The above features make the proposed image compression scheme beneficial to the areas of real-time applications and wireless transmission in limited bandwidth and low computation power environments
關鍵字
語言英文
收錄於
會議性質國際
校內研討會地點
研討會時間20000528~20000530
通訊作者
國別瑞士
公開徵稿
出版型式
出處Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on vol.3, pp.33-36
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