New PDF release: Advances in Computer Vision

By Joachim Weickert, Brahim Benhamouda (auth.), Prof. Dr. Franc Solina, Prof. Dr. Walter G. Kropatsch, Prof. Dr. Reinhard Klette, Prof. Dr. Ruzena Bajcsy (eds.)

ISBN-10: 3211830227

ISBN-13: 9783211830222

ISBN-10: 3709168678

ISBN-13: 9783709168677

Computer imaginative and prescient options was once very particular and tough to conform to various or maybe unexpected occasions. the present improvement is looking for easy to exploit but powerful functions that may be hired in a number of occasions. This development calls for the reassessment of a few theoretical matters in computing device imaginative and prescient. a greater normal figuring out of imaginative and prescient procedures, new insights and higher theories are wanted. The papers chosen from the convention staged in Dagstuhl in 1996 to collect scientists from the West and the previous eastern-block nations deal with those objectives and canopy such fields as 2nd photos (scale area, morphology, segmentation, neural networks, Hough rework, texture, pyramids), restoration of 3-D constitution (shape from shading, optical movement, three-D item acceptance) and the way imaginative and prescient is built-in right into a higher task-driven framework (hand-eye calibration, navigation, perception-action cycle).

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Table 5: Results for face recognition - preselected choice of training faces; recognition rate - column R; no decision rate - column N; error rate - column E (all rates in percents); t - size of training set per person. 0 Comparison of memory capacity for Hopfield and subnetwork approach Let N be number of pixels in one image, CH - number of bytes occupied by weight matrix in a Hopfield approach, KH - number of images stored in Hopfield case, Cs - number of bytes occupied by bias and offsets matrices in the subnetwork approach, and Ks - number of images stored in the subnetwork approach.

It can be easily observed that recognition based on such trivial autoassociative subsystems is equivalent to recognition by template matching. Though template matching is strongly criticised, its generalization to k-NN method is still competitive in many applications where memory space is not critical [6]. However, for face recognition, template matching approach requires huge memory space to keep sample pictures for each person in a big face data base. From this observation, we conclude that we should demand from autoassociative subsystems to be represented by much less data bits than training patterns include.

It is shown that the ML (maximum likelihood) principle is a special case of MDL principle. Finally, in Sect 3 an approximate encoding for non graph theoretic models are presented. A greedy algorithm for model selection is presented in Sect 4. The algorithm takes the line segments obtained by the Hough transform [13] on an edge image and eliminates unnecessary edges based on the MDL principle. 2 MDL Principle-an Overview Since there will generally be several models that explain objects we need a sound basis for grading models.

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Advances in Computer Vision by Joachim Weickert, Brahim Benhamouda (auth.), Prof. Dr. Franc Solina, Prof. Dr. Walter G. Kropatsch, Prof. Dr. Reinhard Klette, Prof. Dr. Ruzena Bajcsy (eds.)


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