image processing system, learning method for main neural network and preprocessing of a system, image processing method and biometric identification method

摘要

image processing system (1) (4) comprising a main neural network (2), preferably convolution-based (cnn), and at least one preprocessing neural network (6), preferably convolution-based , upstream of the main neural network (2), to be performed prior to processing by the main neural network (2) at least one parametric transform f, differentiable in its parameters, this transform to be applied to at least a part of the image pixels and as p is a processed pixel of the original image, or a decomposition of this image, p 'is the pixel of the transformed image or its decomposition, v (p) is an immediate vicinity of a pet pixel or a parameter vector, at least part of the preprocessor neural network (6) learning is performed simultaneously with the main neural network (2).