Farrajota, MiguelRodrigues, J. M. F.du Buf, J. M. H.2011-12-062011-12-062009Farrajota, Miguel ; Rodrigues, J.M.F.; du Buf, J.M.H. Multi-scale keypoint annotation - a biological approach, Trabalho apresentado em RECPAD 2009, In Proc. 15th Portuguese Conf. on Pattern Recogn. (RECPAD 2009), Aveiro, Portugal, 2009.AUT: JRO00913; DUB00865;http://hdl.handle.net/10400.1/880The primary visual cortex employs simple, complex and end-stopped cells to create a scale space of 1D singularities (lines and edges) and of 2D singularities (line and edge junctions and crossings called keypoints). In this paper we show first results of a biological model which attributes information of the local image structure to keypoints at all scales, ie junction type (L, T, +) and main line/edge orientations. Keypoint annotation in combination with coarse to fine scale processing facilitates various processes, such as image matching (stereo and optical flow), object segregation and object tracking.engVisão humanaconference object2011-12-05