Abstract: The present disclosure relates to a depth map sensor including a light source for transmitting light pulses into an image scene; an array of pixel circuits, where each pixel circuit has a photodetector and three asynchronous counters; and a control circuit to control each of a plurality of groups of the pixel circuits of the array to generate a histogram of detection events by accumulating events during eight distinct time intervals between consecutive light pulses transmitted by the light source, such that the histogram comprises eight or more histogram bins.

Abstract: The present disclosure relates to a depth map sensor including a light source for transmitting light pulses into an image scene; an array of pixel circuits, where each pixel circuit has a photodetector and three asynchronous counters; and a control circuit to control each of a plurality of groups of the pixel circuits of the array to generate a histogram of detection events by accumulating events during eight distinct time intervals between consecutive light pulses transmitted by the light source, such that the histogram comprises eight or more histogram bins.

Abstract: An autofocus method determines that a ranging device of a digital camera has failed in an attempt to provide a distance estimation. The ranging device provides one or more parameters indicating conditions related to the failure of the ranging device to provide the distance estimation. An autofocus sequence based on the one or more parameters is then performed.

Abstract: An autofocus method determines that a ranging device of a digital camera has failed in an attempt to provide a distance estimation. The ranging device provides one or more parameters indicating conditions related to the failure of the ranging device to provide the distance estimation. An autofocus sequence based on the one or more parameters is then performed.

Abstract: A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, including combining a first digital word derived from a physical parameter network with a second word stored in a non-volatile memory element.

Abstract: A method and a circuit of generation of several secret quantities by an integrated circuit according to the destination of these secret quantities, including taking into account a first digital word forming a single identifier of the integrated circuit chip and coming from a physical parameter network, and of individualizing this identifier according to the application.

Abstract: A digital image processing method includes extracting chromatic information of an image taken by an image taking device and related to a human subject; detecting visually interesting regions; and exposure correcting of the taken image by normalizing a grey scale of the taken image based on the visually interesting regions. Advantageously, the method includes recognizing areas corresponding to the skin of the subject, these areas being used as the visually interesting regions for the exposure correction step.

Abstract: A method and a system for evaluating the definition of the image of an eye iris or the like, including approximately localizing the pupil in the image, defining, from the approximate position of the pupil, an examination window centered on this position, and applying a gradient accumulation operation to the luminance values of the pixels of the examination window, the running total being proportional to the definition score of the image.

Abstract: A digital image processing method includes extracting chromatic information of an image taken by an image taking device and related to a human subject; detecting visually interesting regions; and exposure correcting of the taken image by normalizing a grey scale of the taken image based on the visually interesting regions. Advantageously, the method includes recognizing areas corresponding to the skin of the subject, these areas being used as the visually interesting regions for the exposure correction step.

Abstract: A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, in which a first digital word is generated from a physical parameter network, and this first word is submitted to at least one retroaction shift register, the output of the shift register forming the secret quantity.

Abstract: A method for detecting a pattern in a digital image by successive comparison of the content of current windows with the content of at least one reference window representative of the pattern, the reference window containing values of variance or standard deviation of sub-blocks of pixels of the pattern and the current windows containing values of variance or standard deviation of sub-blocks of pixels of the image, the sub-blocks being of the same size in the current and reference windows.

Abstract: A digital image processing method includes extracting chromatic information of an image taken by an image taking device and related to a human subject; detecting visually interesting regions; and exposure correcting of the taken image by normalizing a grey scale of the taken image based on the visually interesting regions. Advantageously, the method includes recognizing areas corresponding to the skin of the subject, these areas being used as the visually interesting regions for the exposure correction step.

Abstract: A method and a system determine a score characteristic of the definition of a digital imageby cumulating the quadratic norm of horizontal and vertical gradients of luminance values of pixels of the image, the pixels being chosen at least according to a first maximum luminance threshold of other pixels in the concerned direction.

Abstract: A method and a system for evaluating the definition of the image of an eye iris or the like, consisting of approximately localizing the pupil in the image, defining, from the approximate position of the pupil, an examination window centered on this position, and applying a gradient accumulation operation to the luminance values of the pixels of the examination window, the running total being proportional to the definition score of the image.

Abstract: A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, in which a first digital word is generated from a physical parameter network, and this first word is submitted to at least one retroaction shift register, the output of the shift register forming the secret quantity.

Abstract: A method and a circuit for generating a secret quantity based on an identifier of an integrated circuit, consisting of combining a first digital word derived from a physical parameter network with a second word stored in a non-volatile memory element.

Abstract: A method for detecting a pattern in a digital image by successive comparison of the content of current windows with the content of at least one reference window representative of the pattern, the reference window containing values of variance or standard deviation of sub-blocks of pixels of the pattern and the current windows containing values of variance or standard deviation of sub-blocks of pixels of the image, the sub-blocks being of the same size in the current and reference windows.