Martigny - Valais - Suisse Illumination � robust Pattern Matching using Distorted Histograms Georg

Illumination-robust Pattern Matching Using Distorted Histograms Illumination-robust Pattern Matching Using Distorted Histograms

It is argued that global illumination should be modeled separately from other incidents that change the appearance of objects. The eeects of intensity variations of the global illumination are discussed and constraints deduced that restrict the shape of a function that maps the histogram of a template to the histogram of an image location. This approach is illustrated for simple pattern matchin...

Martigny - Valais - Suisse

IDIAP Martigny - Valais - Suisse Fast Object Detection using MLP and FFT

We propose a new technique that speeds up signi cantly the time needed by a trained network MLP in our case to detect a face in a large image We reformulate neural activities in the hidden layer of the MLP in terms of lter convolution enabling the use of Fourier transform for an e cient computation of the neural activities A formal proof and a complexity analysis are presented Finally some exam...

IDIAP Martigny - Valais - Suisse Continuous Audio � Visual Speech Recognition

We address the problem of robust lip tracking, visual speech feature extraction, and sensor integration for audiovisual speech recognition applications. An appearance based model of the articulators, which represents linguistically important features, is learned from example images and is used to locate, track, and recover visual speech information. We t a c kle the problem of joint temporal mo...

IDIAP Martigny - Valais - Suisse Optimal Parameterization of Point Distribution Models Georg Thimm Juergen

We address the problem of determining the optimal model complexity for shape modeling This complexity is a compromise between model speci city and generality We show that the error of a model can be split into two components the model error and the tting error of which the rst one can be used to optimize the model complexity based on the speci c application This strategy improves over tradition...