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oai:niigata-u.repo.nii.ac.jp:00002771
2022-12-15T03:35:59Z
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ウェーブレット画像符号化による品質・空間スケーラビリティ
ウェーブレット画像符号化による品質・空間スケーラビリティ
Quality and Spatial Scalabilities Implemented by Using Wavelet Image Coding
阿部, 淑人
菊池, 久和
佐々木, 重信
社団法人映像情報メディア学会
ウェーブレット
多重解像度表現
閾値付き多段ラン長符号化
多重精度表現
スケーラビリティ
A scalable image coding method is presented. Spatial scalability is implemented by using a multiresolution representation produced by a wavelet expansion. Quality scalability is implemented by using a multiprecision representation produced by multistage zero run-length coding after nonlinear quantization. The data rate is controlled by threshold values and/or spatial resolution in the wavelet expansion. The coding method owes its fine scalability and higher compression to multiresolution decomposition, nonlinear quantization, multistage zero run-length coding and arithmetic coding. In addition to the simplicity in coding, edges and outlines are well preserved without blocking noise at low bit rates. A few examples are also given.
映像情報メディア学会
1997-11
jpn
journal article
http://hdl.handle.net/10191/17991
https://niigata-u.repo.nii.ac.jp/records/2771
AN10588970
13426907
映像情報メディア学会誌
映像情報メディア学会誌
51
11
1889
1898
https://niigata-u.repo.nii.ac.jp/record/2771/files/51_11_1889-1898.pdf
application/pdf
1.4 MB
2019-07-29