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公开(公告)号：US20190273867A1
公开(公告)日：2019-09-05
申请号：US16298657
申请日：2019-03-11
申请人： FotoNation Limited
发明人： Petronel BIGIOI , Peter CORCORAN , Piotr STEC
摘要： A method of estimating motion between a pair of image frames of a given scene comprises calculating respective integral images for each of the image frames and selecting at least one corresponding region of interest within each frame. For each region of interest, an integral image profile from each integral image is calculated, each profile comprising an array of elements, each element comprising a sum of pixel intensities from successive swaths of the region of interest for the frame. Integral image profiles are correlated to determine a relative displacement of the region of interest between the pair of frames. Each region of interest is divided into a plurality of further regions of interest before repeating until a required hierarchy of estimated motion for successively divided regions of interest is provided.
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22.发明申请公开(公告)号：US20180278847A1
公开(公告)日：2018-09-27
申请号：US15468409
申请日：2017-03-24
申请人： FotoNation Limited
发明人： Piotr STEC
摘要： A method for determining bias in an inertial measurement unit of an image acquisition device comprises mapping at least one reference point within an image frame into a 3D spherical space based on a lens projection model for the image acquisition device to provide a respective anchor point in 3D space for each reference point. For reference points within a given image frame, an estimate of frame-to-frame motion at the reference point between the given frame and a previously acquired frame is obtained; a measure of device orientation for an acquisition time of the reference point in the given frame and the previously acquired frame, the measure including a bias component, is obtained from the inertial measurement unit; a corresponding anchor point is projected in 3D space according to a difference in the measure of device orientation in the given frame and the previously acquired frame to provide a 3D vector Vm; a result of the estimated frame-to-frame motion for the point from the given frame is projected into the previously acquired frame into 3D space to provide a 3D vector Ve; and a cross product Vc of the 3D vectors Vm and Ve is used to update a bias component value.
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公开(公告)号：US20170363881A1
公开(公告)日：2017-12-21
申请号：US15184071
申请日：2016-06-16
申请人： FotoNation Limited
发明人： Piotr STEC
摘要： In one embodiment, a gimbal adjustment system and an associated method for adjusting the position of an object. The system comprises a base, a plate and a shaft including a pivot attached to the plate. The pivot has a point of contact with the plate in a joint about which the plate is rotatable. Magnetic elements are positioned on the base and the plate to stabilize or rotate the plate. The object may be an optical unit attached to the plate. A combination comprising the plate, optical unit and magnetic elements may form a gimbaled assembly having a center of mass in the joint.
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