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公开(公告)号：US20200326773A1
公开(公告)日：2020-10-15
申请号：US16379348
申请日：2019-04-09
申请人： FotoNation Limited
发明人： Petronel BIGIOI , Piotr STEC
摘要： This disclosure describes, in part, systems and techniques for performing eye tracking. For instance, a system may include a first imaging device that generates first image data. The system may then analyze the first image data to determine a location of a face of a user. Using the location, the system may cause an actuator to move from a first position to a second position in order to direct a second imaging device towards the face of the user. While in the second position, the second imaging device may generate second image data representing at least the face of the user. The system may then analyze the second image data to determine a gaze direction of the user. In some instances, the first imaging device may include a first field of view (FOV) that is greater than a second FOV of the second imaging device.
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公开(公告)号：US20240354897A1
公开(公告)日：2024-10-24
申请号：US18305384
申请日：2023-04-24
申请人： FotoNation Limited
发明人： Piotr STEC , Petronel BIGIOI
CPC分类号： G06T5/50 , G06T5/70 , G06T7/248 , H04N5/2624 , H04N25/47 , G06T2207/10016 , G06T2207/10144 , G06T2207/20081 , G06T2207/20084 , G06T2207/20212
摘要： A system for generating motion blur comprises: a frame camera, an event camera and an accumulator for accumulating event information from a plurality of events occurring within a window around the exposure time of an image frame in a plurality of event frames. A processor determines from the events in at least a first of the plurality of event frames, one or more areas of movement within the field of view of the event camera; determines from the events in at least a second of the plurality of event frames, a direction of movement for the one or more areas of movement; and applies blur in one or more areas of the image frame corresponding to the one or more determined areas of movement in accordance with at least the direction of movement for each of the one or more areas of movement to produce a blurred image.
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公开(公告)号：US20210136298A1
公开(公告)日：2021-05-06
申请号：US16672766
申请日：2019-11-04
申请人： FotoNation Limited
发明人： Piotr STEC , Petronel BIGIOI , Istvan ANDORKO
摘要： A handheld computing device comprises a display comprising an array of pixels illuminated by a plurality of visible light sources, and a plurality of infra-red light sources interleaved between the visible light sources, the IR light sources being actuable to emit diffuse IR light with a first intensity. A camera has an image sensor comprising an array of pixels responsive to infra-red light and a lens assembly with an optical axis extending from the image sensor through the surface of the display. A dedicated illumination source is located outside the display and is actuable to emit infra-red light with a second greater intensity. A processor is configured to switch between an iris region processing mode in which a subject is illuminated at least by the dedicated light source and a face region processing mode in which a subject is illuminated by the plurality of IR light sources.
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公开(公告)号：US20200324780A1
公开(公告)日：2020-10-15
申请号：US16719686
申请日：2019-12-18
申请人： FotoNation Limited
发明人： Piotr STEC , Petronel BIGIOI
摘要： This disclosure describes, in part, systems and techniques for performing eye tracking. For instance, a system may include a first imaging device that generates first image data. The system may then analyze the first image data to determine a location of a face of a user. Using the location, the system may cause an actuator to move from a first position to a second position in order to direct a second imaging device towards the face of the user. While in the second position, the second imaging device may generate second image data representing at least the face of the user. The system may then analyze the second image data to determine a gaze direction of the user. In some instances, the first imaging device may include a first field of view (FOV) that is greater than a second FOV of the second imaging device.
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公开(公告)号：US20220309709A1
公开(公告)日：2022-09-29
申请号：US17214424
申请日：2021-03-26
申请人： FotoNation Limited
发明人： Piotr STEC
摘要： A method comprises displaying a first image acquired from a camera having an input camera projection model including a first focal length and an optical axis parameter value. A portion of the first image is selected as a second image associated with an output camera projection model in which either a focal length and/or an optical axis parameter value differ from the parameters of the input camera projection model. The method involves iteratively: adjusting either the focal length and/or an optical axis parameter value for the camera lens so that it approaches the corresponding value of the output camera projection model; acquiring a subsequent image using the adjusted focal length or optical axis parameter value; mapping pixel coordinates in the second image, through a normalized 3D coordinate system to respective locations in the subsequent image to determine respective values for the pixel coordinates; and displaying the second image.
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公开(公告)号：US20190364229A1
公开(公告)日：2019-11-28
申请号：US15990519
申请日：2018-05-25
申请人： FotoNation Limited
发明人： Piotr STEC , Petronel BIGIOI
摘要： An image processing system comprises at least one image sensor comprising a plurality of sub-pixels, and configured to provide a first image plane from a group of first sub-pixels selectively sensitive to a first NIR light band and a second image plane from a group of second sub-pixels selectively sensitive to a second NIR light band. An NIR light source is capable of separately emitting first NIR light corresponding to the first NIR light band and second NIR light corresponding to the second NIR light band. The system can be configured to operate according to at least a first working mode where a face detector is configured to detect at least a first face in the first image plane and a second face in the second image plane at a spatially non-coincident location to the first face.
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公开(公告)号：US20190327431A1
公开(公告)日：2019-10-24
申请号：US16503034
申请日：2019-07-03
申请人： FotoNation Limited
发明人： Piotr STEC , Brian O'SULLIVAN
摘要： A method for compensating for off-axis tilting of a lens relative to an image sensor in an image acquisition device comprises acquiring a set of calibrated parameters n → ≡ ( n x n y n z ) corresponding to the tilting of said lens. P′x and P′y indicate a coordinate of a pixel in an acquired image. Image information is mapped from the acquired image to a lens tilt compensated image according to the formulae: P x ′ = s n z ( n z - 1 ) ( ( n x 2 + n z ( n z - 1 ) ) u x + n x n y u y ) P y ′ = s n z ( n z - 1 ) ( ( n y 2 + n z ( n z - 1 ) ) u y + n x n y u x ) where s comprises a scale factor given by s = n z u x n x + u y n y + n z and where ux and uy indicate the location of a pixel in the lens tilt compensated image.
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公开(公告)号：US20190228502A1
公开(公告)日：2019-07-25
申请号：US15879310
申请日：2018-01-24
申请人： FotoNation Limited
发明人： Piotr STEC , Vlad GEORGESCU
摘要： A method for correcting an image divides an output image into a grid with vertical sections of width smaller than the image width but wide enough to allow efficient bursts when writing distortion corrected line sections into memory. A distortion correction engine includes a relatively small amount of memory for an input image buffer but without requiring unduly complex control. The input image buffer accommodates enough lines of an input image to cover the distortion of a single most vertically distorted line section of the input image. The memory required for the input image buffer can be significantly less than would be required to store all the lines of a distorted input image spanning a maximal distortion of a complete line within the input image.
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9.发明公开公开(公告)号：US20230188860A1
公开(公告)日：2023-06-15
申请号：US17547103
申请日：2021-12-09
申请人： FotoNation Limited
发明人： Istvan ANDORKO , Petronel BIGIOI , Piotr STEC
CPC分类号： H04N5/2354 , H04N5/343 , B60R11/04 , G06V40/16 , G06V10/25
摘要： A vehicle occupant monitoring system, OMS, comprises: an image acquisition device comprising an image sensor and a lens assembly having a varying transmissivity across a field of view of the image sensor; at least one infra-red, IR, light source disposed within a cabin of the vehicle and being configured to illuminate at least one occupant of the vehicle with varying illumination across the field of view of the image sensor; and an image processing pipeline configured to obtain and pre-process an image acquired from the image sensor in accordance with a lens shading map and a cabin illumination map in order to compensate for both the varying transmissivity and the varying illumination in order to provide a more uniformly illuminated image to a controller for further analysis.
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10.发明公开公开(公告)号：US20230186650A1
公开(公告)日：2023-06-15
申请号：US17547060
申请日：2021-12-09
申请人： FotoNation Limited
发明人： Istvan ANDORKO , Petronel BIGIOI , Piotr STEC
CPC分类号： G06V20/593 , H04N5/2353 , H04N5/2354 , H04N5/33
摘要： A vehicle occupant monitoring system, OMS, comprises an image acquisition device with a rolling shutter image sensor configured to selectively operate in either: a full-resolution image mode where an image frame corresponding to the full image sensor is provided; or a region of interest, ROI, mode, where an image frame corresponding to a limited portion of the image sensor is provided. An object detector is configured to receive a full-resolution image from the image sensor and to identify a ROI corresponding to an object of interest within the image. A controller is configured to obtain an image corresponding to the ROI from the image sensor operating in ROI mode, the image having an exposure time long enough for all rows of the ROI to be illuminated by a common pulse of light from at least one infra-red light source and short enough to limit motion blur within the image.
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