Abstract: A method and a device for measuring the statistical distribution of a physical quantity by a sensor. At each observation of the physical quantity, the sensor provides, in the form of a binary vector, a quantised value of this quantity. Afterwards, this binary vector is projected onto a measurement space with a smaller dimension than the number of quantisation levels in order to provide a vector representative of the quantised value. The measurement vector of the histogram is updated on the fly by adding thereto the vector representative of the quantised value. Afterwards, this measurement vector may be used as an input variable of a neural network trained beforehand to predict a target variable dependent on the statistical distribution of the physical quantity.

Abstract: The present description concerns a circuit comprising: a number generator (205) configured to generate a sequence of vectors (207, 219) of size , the vector sequence being the same at each start-up of the number generator; a memory (211) configured to store a set of first parameters (?) of an auxiliary neural network (204); a processing device configured to generate a set of second parameters of a layer (201) of a main neural network by the application a plurality of times of a first operation (g), by the auxiliary neural network, performing a generation operation from each vector generated by the number generator, each generation delivering a vector of second parameters, the set of the vectors of second parameters forming said set of second parameters; and wherein the number of second parameters is greater than the number of first parameters.

Abstract: The present invention relates to a scene descriptor generation system, including an image sensor including a plurality of pixels, successively supplying S binary image planes, each including a single binary value per pixel; and a processing circuit configured to, for each binary image plane supplied by the sensor (100), to implement the successive steps of: a) calculating N convolutions of the binary image plane with respectively N distinct convolution kernels, to provide N convolved images; b) generating at least one meta-image from the N convolved images supplied at step a); and c) for each of the N convolved images supplied at step a), generating a binary descriptor from said convolved image and from said at least one meta-image.

Abstract: The present disclosure relates to a method of performing, by an image processing circuit, an inference operation comprising: capturing first and second images using first and second values respectively of an image capture parameter; generating, for a first region of the first and second images, first and second estimates respectively of an image quality metric, wherein the image quality metric is dependent on the value of the image capture parameter; calculating first and second distances between the first and second estimates respectively and first and second target levels respectively; and supplying a result of the inference operation performed on the first region of either the first or second image selected based on the first and second distances.

Abstract: The present invention relates to an imaging system, including: a coherent light source delivering an object beam and a reference beam; a device of modulation of the object beam with a modulation signal; an image sensor arranged to receive an interference pattern resulting from a combination of the object beam and of the reference beam; and a demodulation device, the system being configured to, during a measurement phase: apply to the modulation signal a first pseudo-random sequence of jumps of a parameter selected among the phase, the frequency, and the amplitude; and simultaneously apply to the modulated portion of the object beam a second pseudo-random sequence of jumps of said parameter, wherein the first and second sequences of jumps of said parameter are non-correlated.

Abstract: The present description concerns a method of generation of a sequence of pseudo-random digital codes enabling to perform a permutation (3) of a first set of values (V) into a second set of values (Vp) based on said digital codes (CPos) representative of positions (j) of values (Vi) of the first set in the second set, including the steps of: generating, by successive iterations, a chain of numbers, called seed numbers, from an initial pseudo-random seed number (W0) by application of a first function (24, 26) from a seed number to the next seed number; applying a second function to each seed number of the chain to obtain each position code (CPos(j)), the second function including at least one permutation (PERM) followed by a bijection (BIJ).

Abstract: The present invention relates to a scene descriptor generation system, including an image sensor including a plurality of pixels, successively supplying S binary image planes, each including a single binary value per pixel; and a processing circuit configured to, for each binary image plane supplied by the sensor (100), to implement the successive steps of: a) calculating N convolutions of the binary image plane with respectively N distinct convolution kernels, to provide N convolved images; b) generating at least one meta-image from the N convolved images supplied at step a); and c) for each of the N convolved images supplied at step a), generating a binary descriptor from said convolved image and from said at least one meta-image.

Abstract: The present invention relates to an imaging system, including: a coherent light source delivering an object beam and a reference beam; a device of modulation of the object beam with a modulation signal; an image sensor arranged to receive an interference pattern resulting from a combination of the object beam and of the reference beam; and a demodulation device, the system being configured to, during a measurement phase: apply to the modulation signal a first pseudo-random sequence of jumps of a parameter selected among the phase, the frequency, and the amplitude; and simultaneously apply to the modulated portion of the object beam a second pseudo-random sequence of jumps of said parameter, wherein the first and second sequences of jumps of said parameter are non-correlated.

Abstract: A method of processing an image including pixels distributed in cells and in blocks is disclosed, the method including the steps of: a) for each cell, generating n first intensity values of gradients having different orientations, each first value being a weighted sum of the values of the pixels of the cell; b) for each cell, determining a main gradient orientation of the cell and a second value representative of the intensity of the gradient in the main orientation; c) for each block, generating a descriptor of n values respectively corresponding, for each of the n gradient orientations, to the sum of the second values of the cells of the block having the gradient orientation considered as the main gradient orientation.

Abstract: The invention concerns a method of performing intra-frame and inter-frame image processing comprising: alternating first and second image capture operations, the first image capture operation comprises capturing one or more first images (IA) based on a first set of image capture parameters (PA) and the second image capture operation comprises capturing one or more second images (IB) based on a second set of image capture parameters (PB), the values of the parameters of the first set being modified between each of the first image capture operations and the values of the parameters of the second set remaining constant between each of the second image capture operations or varying by less than a significant amount.

Abstract: An image sensor including: a plurality of pixels, each pixel being capable of supplying an output signal representative of a quantity of light energy received from a time of beginning of a pixel integration phase; and a control circuit configured to, during a phase of acquisition of an image, successively select each pixel a number n of times during a same pixel integration phase, without resetting the pixel between the first and the last selection of the pixel and, for each selection of a pixel, compare the output signal of the pixel with a quantization threshold and read a binary signal representative of the result of the comparison.

Abstract: A method of generating, by means of a processing device, a depth map and/or a fully focused image of a scene, from a series of images of the scene taken under a same viewing angle but with a different focusing, the method including the steps of: a) for each position of a pixel in the series of images, searching for an extremum of the pixel value in the series of images; and b1) assigning to said pixel position a depth value which is a function of the rank, in the series of images, of the image where the extremum has been identified at step a) to construct a depth map of the scene, and/or b2) assigning to said pixel position the value of the extremum identified at step a) to construct a fully focused image of the scene.

Abstract: The invention concerns a method of performing intra-frame and inter-frame image processing comprising: alternating first and second image capture operations, the first image capture operation comprises capturing one or more first images (IA) based on a first set of image capture parameters (PA) and the second image capture operation comprises capturing one or more second images (IB) based on a second set of image capture parameters (PB), the values of the parameters of the first set being modified between each of the first image capture operations and the values of the parameters of the second set remaining constant between each of the second image capture operations or varying by less than a significant amount.

Abstract: An electronic system including: a sensor (201) capable of successively supplying n vectors Li each including k values Li(j); and an electronic device (403) for processing on the fly the values measured by the sensor, including: a first stage (407) capable, each time a vector Li has been supplied by the sensor, of multiplying the k values Li(j) of vector Li by respectively k coefficients bi(j), and of supplying a vector T1i of k values T1i(j); a second stage (409) capable, each time a vector T1i has been supplied, of multiplying vector T1i by a matrix à of k*p coefficients, and of supplying a vector T2i of p values T2i(l); and a third stage (411) capable of digitally integrating the n vectors T2i and of supplying an output vector IT of p values IT(l).

Abstract: The invention relates to an electronic device for analyzing a scene, including a plurality of pixels (101) connected to a readout circuit (103) by a same first conductive track (105), wherein: each pixel (101) is capable of detecting an occurrence of a first event characteristic of the scene and of transmitting an event indication signal on the first conductive track (105) when it detects an occurrence of the first event; and the readout circuit (103) is capable of reading from the first conductive track (105) the event indication signals transmitted by the pixels (101) and of deducing therefrom characteristics of the scene, without transmitting event acknowledgement signals to the pixels (101).

Abstract: A method of processing an image including pixels distributed in cells and in blocks is disclosed, the method including the steps of: a) for each cell, generating n first intensity values of gradients having different orientations, each first value being a weighted sum of the values of the pixels of the cell; b) for each cell, determining a main gradient orientation of the cell and a second value representative of the intensity of the gradient in the main orientation; c) for each block, generating a descriptor of n values respectively corresponding, for each of the n gradient orientations, to the sum of the second values of the cells of the block having the gradient orientation considered as the main gradient orientation.

Abstract: A sigma-delta converter including a sigma-delta modulator including at least one analog filter capable, for each cycle of a conversion phase, of receiving an internal analog signal originating from the analog input signal and of supplying an analog output signal, wherein: the contribution of the internal analog signal to the output value of the filter is smaller at a given cycle of the conversion phase than at a previous cycle, the contributions to the different cycles being governed by a first predetermined law which is a function of the rank of the cycle; and the duration of a given cycle of the conversion phase is shorter than the duration of a previous cycle, the durations of the different cycles being governed by a second predetermined law which is a function of the rank of the cycle in the conversion phase.

Abstract: A sigma-delta converter comprises a sigma-delta modulator suitable for supplying a series of binary samples (BS(k)) representative of an analogue input signal (Vin) to be digitized, in which at least one analogue signal internal to the modulator is weighted by a coefficient that is variable according to a first predetermined law (f).

Abstract: An electronic system including: a sensor (201) capable of successively supplying n vectors Li each including k values Li(j); and an electronic device (403) for processing on the fly the values measured by the sensor, including: a first stage (407) capable, each time a vector Li has been supplied by the sensor, of multiplying the k values Li(j) of vector Li by respectively k coefficients bi(j), and of supplying a vector T1i of k values T1i(j); a second stage (409) capable, each time a vector T1i has been supplied, of multiplying vector T1i by a matrix à of k*p coefficients, and of supplying a vector T2i of p values T2i(l); and a third stage (411) capable of digitally integrating the n vectors T2i and of supplying an output vector IT of p values IT(l).

Abstract: An image sensor including: a plurality of pixels, each pixel being capable of supplying an output signal representative of a quantity of light energy received from a time of beginning of a pixel integration phase; and a control circuit configured to, during a phase of acquisition of an image, successively select each pixel a number n of times during a same pixel integration phase, without resetting the pixel between the first and the last selection of the pixel and, for each selection of a pixel, compare the output signal of the pixel with a quantization threshold and read a binary signal representative of the result of the comparison.