Resolution enhancement of low-quality videos using a high-resolution frame

Tuan Q. Pham; Lucas J. van Vliet; Klamer Schutte

doi:10.1117/12.643489

19 January 2006 Resolution enhancement of low-quality videos using a high-resolution frame

Tuan Q. Pham, Lucas J. van Vliet, Klamer Schutte

Proceedings Volume 6077, Visual Communications and Image Processing 2006; 607708 (2006) https://doi.org/10.1117/12.643489
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

This paper proposes an example-based Super-Resolution (SR) algorithm of compressed videos in the Discrete Cosine Transform (DCT) domain. Input to the system is a Low-Resolution (LR) compressed video together with a High-Resolution (HR) still image of similar content. Using a training set of corresponding LR-HR pairs of image patches from the HR still image, high-frequency details are transferred from the HR source to the LR video. The DCT-domain algorithm is much faster than example-based SR in spatial domain⁶ because of a reduction in search dimensionality, which is a direct result of the compact and uncorrelated DCT representation. Fast searching techniques like tree-structure vector quantization¹⁶ and coherence search¹ are also key to the improved efficiency. Preliminary results on MJPEG sequence show promising result of the DCT-domain SR synthesis approach.

Citation Download Citation

Tuan Q. Pham, Lucas J. van Vliet, and Klamer Schutte "Resolution enhancement of low-quality videos using a high-resolution frame", Proc. SPIE 6077, Visual Communications and Image Processing 2006, 607708 (19 January 2006); https://doi.org/10.1117/12.643489

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