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Cortical multiscale line-edge disparity model
Rodrigues, J. M. F.; Martins, Jaime A.; Lam, Roberto Célio Lau; du Buf, J. M. H.Most biological approaches to disparity extraction rely on the disparity energy model (DEM). In this paper we present an alternative approach which can complement the DEM model. This approach is based on the multiscale coding of lines and edges, because surface structures are composed of lines and edges and contours of objects often cause edges against their background. We show that the line/edge approach can b...
A disparity energy model improved by line, edge and keypoint correspondences
Martins, J. C.; Farrajota, Miguel; Lam, Roberto Célio Lau; Rodrigues, J. M. F.; Tersic, K.; du Buf, J. M. H.Disparity energy models (DEMs) estimate local depth information on the basis ofVl complex cells. Our recent DEM (Martins et al, 2011 ISSPlT261-266) employs a population code. Once the population's cells have been trained with randorn-dot stereograms, it is applied at all retinotopic positions in the visual field. Despite producing good results in textured regions, the model needs to be made more precise, especi...
Cortical 3D Face Recognition Framework
Rodrigues, J. M. F.; Lam, Roberto Célio Lau; du Buf, J. M. H.Empirical studies concerning face recognition suggest that faces may be stored in memory by a few canonical representations. In cortical area V1 exist double-opponent colour blobs, also simple, complex and end-stopped cells which provide input for a multiscale line/edge representation, keypoints for dynamic routing and saliency maps for Focus-of-Attention. All these combined allow us to segregate faces. Events ...
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