ウェーブレット-DCTによる画像符号化手法に関する一検討

抄録

There are a number of approaches which apply the DCT (Discrete Cosine Transform) on image coding, however higher compression rate causes blocky noise by quantizing the low band and causes mosquito noise by quantizing the high band when the image is being reconstructed. To overcome the defects, we propose the DCT - Wavelet Transform for improving the quality on reconstruction of the compressed image. By implementing the proposed method, the examples demonstrated that a better quality is obtained for image reconstruction.