DCTによる次元圧縮と事例選択を用いたビデオ超解像アルゴリズムの高速化(<論文特集>画像処理・符号化とアプリケーション)

概要

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In learning-based super-resolution algorithms, there are two major problems. One is that they require a large amount of memory to store examples; the other is the high computational cost of finding the nearest neighbors in the database. We have developed a novel learning-based video super-resolution algorithm with less memory requirements and computational cost. To this end, we adopted discrete cosine transform coefficients for feature vector components. Moreover, we designed an example selection procedure to construct a compact database. We conducted evaluative experiments using MPEG test sequences and real images to synthesize a high-resolution video. Experimental results show that our method improves the effectiveness of super-resolution algorithms, while preserving the quality of synthesized images.
2008-11-01