3 papers
cs.CV2014
Combining contextual and local edges for line segment extraction in cluttered images
Rui F. C. Guerreiro
Automatic extraction methods typically assume that line segments are pronounced, thin, few and far between, do not cross each other, and are noise and clutter-free. Since these ass…
cs.MM2014
Maximizing compression efficiency through block rotation
Rui F. C. Guerreiro, Pedro M. Q. Aguiar
The Discrete Cosine Transform (DCT) is widely used in lossy image and video compression schemes, e.g., JPEG and MPEG. In this paper, we show that the compression efficiency of the…
cs.CV2010
3-D Rigid Models from Partial Views - Global Factorization
Pedro M. Q. Aguiar, Rui F. C. Guerreiro, Bruno B. Gonçalves
The so-called factorization methods recover 3-D rigid structure from motion by factorizing an observation matrix that collects 2-D projections of features. These methods became pop…