We consider a task of tracing out target figures hidden in teeming figure pictures come to known as Wimmelbild(er). Wimmelbild is a popular genre of visual puzzles;a timeless classic for children, artists and cognitiv...
详细信息
We present Multi scale Shape Index (MSSI), a novel feature for 3D object recognition. Inspired by the scalespace filtering theory and Shape Index measure proposed by Koenderink & Van Doorn [6], this feature assoc...
详细信息
We present a theory and a method for simultaneous detection of local spatial and temporal scales in video data. the underlying idea is that if we process video data by spatio-temporal receptive fields at multiple spat...
详细信息
ISBN:
(纸本)9783319587714;9783319587707
We present a theory and a method for simultaneous detection of local spatial and temporal scales in video data. the underlying idea is that if we process video data by spatio-temporal receptive fields at multiple spatial and temporal scales, we would like to generate hypotheses about the spatial extent and the temporal duration of the underlying spatio-temporal image structures that gave rise to the feature responses. For two types of spatio-temporal scale-space representations, (i) a non-causal Gaussian spatio-temporal scalespace for offline analysis of pre-recorded video sequences and (ii) a time-causal and time-recursive spatio-temporal scalespace for online analysis of real-time video streams, we express sufficient conditions for spatio-temporal feature detectors in terms of spatio-temporal receptive fields to deliver scale covariant and scale invariant feature responses. A theoretical analysis is given of the scale selection properties of six types of spatio-temporal interest point detectors, showing that five of them allow for provable scale covariance and scale invariance. then, we describe a time-causal and time-recursive algorithm for detecting sparse spatio-temporal interest points from video streams and show that it leads to intuitively reasonable results.
Segmentation is one of the most discussed problems in image processing. Many various methods for image segmentation exist. the mean-shift method is one of them and it was widely developed in recent years and it is sti...
详细信息
We consider a differential model describing neuro-physiological contrast perception phenomena induced by surrounding orientations. the mathematical formulation relies on a cortical-inspired modelling [11] largely used...
详细信息
ISBN:
(纸本)9783030223687;9783030223670
We consider a differential model describing neuro-physiological contrast perception phenomena induced by surrounding orientations. the mathematical formulation relies on a cortical-inspired modelling [11] largely used over the last years to describe neuron interactions in the primary visual cortex (V1) and applied to several image processing problems [14,15,21]. Our model connects to Wilson-Cowan-type equations [26] and it is analogous to the one used in [3,4,16] to describe assimilation and contrast phenomena, the main novelty being its explicit dependence on local image orientation. To confirm the validity of the model, we report some numerical tests showing its ability to explain orientation-dependent phenomena (such as grating induction) and geometric-optical illusions [18,24] classically explained only by filtering-based techniques [7,20].
In this paper we propose a new method to solve the problem of uncalibrated photometric stereo, making very weak assumptions on the properties of the scene to be reconstructed. Our goal is to solve the generalized bas-...
详细信息
the census transform is becoming increasingly popular in the context of optic flow computation in image sequences. Since it is invariant under monotonically increasing grey value transformations, it forms the basis of...
详细信息
We propose a novel method to obtain a part of an optimal non-relaxed integral solution for energy minimization problems with Potts interactions, known also as the minimal partition problem. the method empirically outp...
详细信息
the efficient compression of depth maps is becoming more and more important. We present a novel codec specifically suited for this task. In the encoding step we segment the image and extract between-pixel contours. Su...
详细信息
In many practical problems wavelet theory offers methods to handle data in different scales. It is highly adaptable to represent data in a compact and sparse way without loss of information. We present an approach to ...
详细信息
暂无评论