Université de Neuchâtel

Multiresolution reliability scheme for range image filtering

Zamofing, Thierry ; Hügli, Heinz

In: Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology II (Proceedings of SPIE), 2006, vol. 5606, no. 9, p. 134-144

A large number of 3D cameras suffer from so-called holes in thedata, i.e. the measurement lattice is affected by invalidmeasurements and the range image has undefined values.Conventional image filters used for removing the holes perform notwell in presence of holes with large varying hole sizes. The novelhole-filling method presented in this paper operates onreliability attributed range images...

Université de Neuchâtel

Applied multifocus 3D microscopy

Zamofing, Thierry ; Hügli, Heinz

In: Two- and Three-Dimensional Vision Systems for Inspection, Control, and Metrology (Proceedings of SPIE), 2003, vol. 5265, no. 19, p. 134-144

The depth from focus measurement principle relies on the detection of the optimal focusing distance for measuring the depth map of an object and finding its 3D shape. The principle is most effective at microscopic ranges where it is usually found implemented around a z-controlled microscope and sometimes named multifocus 3D microscopy. Assuch, the method competes with many other 3D measurement...

Université de Neuchâtel

Pedestrian Detection by Range Imaging

Hügli, Heinz ; Zamofing, Thierry

In: Proceedings. Conference on Computer Vision Theory and Applications (VISAPP), 2007, p. 1-5

Remote detection by camera offers a versatile means for recording people activities. Relying principally on changes in video images, the method tends to fail in presence of shadows and illumination changes. This paper explores a possible remedy to these problems by using range cameras instead of conventional video cameras. As range is an intrinsic measure of object geometry, it is basically not...