In this paper, sequences of camera motions that lead to inherent ambiguities in uncalibrated Euclidean reconstruction or self-calibration are studied. Our main contribution is a complete, detailed classification of these critical motion sequences (CMS). The practically important classes are identified and their degrees of ambiguity are derived. We also discuss some practical issues, especially ...

A critical element of most national telecom policy objectives is advancing universal service. International Telecommunications Union (ITU) considers universal service provision as purely for the purpose of making available telecommunication services of specified quality, and in light of the specific national conditions, at an affordable price to that minority of potential users who do not have ...

The correspondence of various spectral difference error metrics to human discrimination data was investigated. Time-varying harmonic amplitude data were obtained from the spectral analysis of eight musical instrument sounds (bassoon, clarinet, flute, horn, oboe, saxophone, trumpet, and violin). Sounds were resynthesized with various levels of random spectral alteration, ranging from 1 to 50%. L...

A critical set in a Latin square of order n is a set of entries in a Latin square which can be embedded in precisely one Latin square of order n. Also, if any element of the critical set is deleted, the remaining set can be embedded in more than one Latin square of order n. In this paper we find all the critical sets of different sizes in the Latin squares of order at most six. We count the num...