Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Trixell

Commissariat a L'energie Atomique Et Aux Energies Alternatives

William Guicquero

Arnaud Verdant

Antoine Dupret

Marc Arques

Timothé Laforest

Gilles Sicard

Camille Dupoiron

Wissam Benjilali

Simon Emberger

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.

Image processing for on-chip inference

The present description concerns a method of generation of a sequence of pseudo-random digital codes enabling to perform a permutation () 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 (W) by application of a first function () 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).

Pseudo-random permutation generator

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 (), 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.

Scene descriptor generation system and method

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.

Acoustic-optical imaging system

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.

Image processing method

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.

Method of inter-frame and intra-frame image processing

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.

Synchronous time code image sensor

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:

Method of constructing a depth map of a scene and/or a fully focused image

An electronic system including: a sensor () capable of successively supplying n vectors Leach including k values L(j); and an electronic device () for processing on the fly the values measured by the sensor, including: a first stage () capable, each time a vector Lhas been supplied by the sensor, of multiplying the k values L(j) of vector Lby respectively k coefficients b(j), and of supplying a vector Tof k values T(j); a second stage () capable, each time a vector Thas been supplied, of multiplying vector Tby a matrix &#xc3; of k*p coefficients, and of supplying a vector Tof p values T(l); and a third stage () capable of digitally integrating the n vectors Tand of supplying an output vector IT of p values IT(l).

On-the-fly processing of data in an acquisition system

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

Electronic device for analyzing a scene

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.

High-linearity sigma-delta converter

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).

The present invention involves a CMOS image sensor including: a plurality of pixels distributed in a plurality of subsets, each subset defining a measurement support; and a circuit capable of implementing a compressive image sensing method, the method including: for a given integration time of the sensor pixels, reading, for each measurement support, a single output value based on the output values of a pseudo-random selection of one or a plurality of pixels of the support.

Compressive image sensing device and method

A system for acquiring a hyperspectral image, including: a grey level image sensor; and a diffuser and dispersive element placed on the optical path between the sensor and a scene, this element including an array of individually-controllable liquid crystal cells, where each cell can receive a control voltage selected from among a series of at least three different control voltages.

Hyperspectral image acquisition system and method

A CMOS image sensor including: a plurality of pixels; a first analog circuit for calculating one or a plurality of statistical estimators based on the analog output values of sensor pixels; and a second circuit capable of implementing a compressive image sensing method, wherein the applied compression rate is a function of the statistical estimator(s) calculated by the first circuit.

Growing community of inventors

Bures-sur-Yvette, France

William Guicquero