Content-fragile commutative watermarking-encryption requires that both the content-fragile image signature and the watermarking process are invariant under encryption. The pixel entropy, being dependent on first-order image statistics only, is invariant under permutations. In the present paper we embed semi-fragile signatures based on pixel entropy by using a histogram-based watermarking algori...

This paper is the first to review the scene flow estimation field to the best of our knowledge, which analyzes and compares methods, technical challenges, evaluation methodologies and performance of scene flow estimation. Existing algorithms are categorized in terms of scene representation, data source, and calculation scheme, and the pros and cons in each category are compared briefly. The dat...

This paper presents a method for improving any object tracking algorithm based on machine learning. During the training phase, important trajectory features are extracted which are then used to calculate a confidence value of trajectory. The positions at which objects are usually lost and found are clustered in order to construct the set of ‘lost zones’ and ‘found zones’ in the scene. Using the...

Humans can recognize biological motion (e.g. a walker) from stimuli with impoverished information, like point-light displays (e.g. a “point-like walker”). Although the neural mechanism underlying such a robust representation remains unclear, a possible explanation is that it is based on specific motion features shared by normal and point-light stimuli. A recent study using image statistics and ...

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ing from Character Motion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Scene segmentation is a crucial task in the structural analysis of film. State-of-the-art scene segmentation algorithms target Hollywoodtype films. There is an abundance of films that differ significantly from Hollywood films and need specific scene segmentation techniques. We propose a scene segmentation algorithm targeted at artistic archive documentaries. We evaluate the performance of our t...

Visitors to aquariums typically rely on their vision to interact with live exhibits that convey rich descriptive and aesthetic visual information. However, some visitors may prefer or need to have an alternative interpretation of the exhibitÕs visual scene to improve their experience. Musical sonification has been explored as an interpretive strategy for this purpose and related work provides s...