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21. 发明申请

US20220060681A1 MEASUREMENT OF AN IMAGE SENSOR POINT SPREAD FUNCTION (PSF) 有权
公开(公告)号：US20220060681A1
公开(公告)日：2022-02-24
申请号：US17405398
申请日：2021-08-18
申请人： FotoNation Limited
发明人： Piotr Stec
IPC分类号： H04N17/00 , H04N5/232 , G06T7/80
摘要： Techniques and arrangements that utilize speckle imaging and autocorrelation to estimate the PSF of an image sensor for a digital imaging apparatus, e.g., a camera or a scanner. In particular, a system of components described herein is a simple arrangement that does not require a complex setup. Therefore, the system is portable and easy to set up. Additionally, by utilizing autocorrelation, the calculations of PSF using data obtained by the system are simplified.

22. 发明授权

US09280810B2 Method and system for correcting a distorted input image 有权
标题翻译：用于校正失真输入图像的方法和系统
公开(公告)号：US09280810B2
公开(公告)日：2016-03-08
申请号：US14728939
申请日：2015-06-02
申请人： FotoNation Limited
发明人： Piotr Stec , Alexei Pososin , Mihai Constantin Munteanu , Corneliu Zaharia , Vlad Georgescu
IPC分类号： G06T5/00 , H04N5/232
CPC分类号： G06T5/006 , G06T2207/10004 , G06T2207/20021 , H04N5/217 , H04N5/23229
摘要： A method for correcting a distorted input image comprises determining a local region of an image to be displayed and dividing said region into an array of rectangular tiles, each tile corresponding to a distorted tile with a non-rectangular boundary within said input image. For each tile of the local region, maximum and minimum memory address locations of successive rows of said input image sufficient to span said boundary of said distorted tile are determined. Successive rows of the distorted input from between said maximum and minimum addresses are read. Distortion of the non-rectangular portion of said distorted input image is corrected to provide a tile of a corrected output image which is stored.
摘要翻译：用于校正失真的输入图像的方法包括确定要显示的图像的局部区域，并将所述区域划分为矩形图块的阵列，每个图块对应于在所述输入图像内具有非矩形边界的失真图块。对于局部区域的每个瓦片，确定足以跨越所述失真瓦片的所述边界的所述输入图像的连续行的最大和最小存储器地址位置。读取从所述最大和最小地址之间的失真输入的连续行。纠正所述失真输入图像的非矩形部分的失真，以提供存储的校正输出图像的图块。

23. 发明申请

US20150365588A1 Portrait Image Synthesis from Multiple Images Captured on a Handheld Device 审中-公开
标题翻译：手持设备上捕获的多个图像的肖像图像合成
公开(公告)号：US20150365588A1
公开(公告)日：2015-12-17
申请号：US14834067
申请日：2015-08-24
申请人： FotoNation Limited
发明人： Petronel Bigioi , Peter Corcoran , Piotr Stec
IPC分类号： H04N5/232
CPC分类号： H04N5/23216 , H04N5/23219 , H04N5/23222 , H04N5/23238 , H04N5/23245 , H04N5/23293 , H04N13/221
摘要： A hand-held digital image capture device (digital camera) has a user-selectable mode in which upon engaging the mode the device detects a face in the field of view of the device and generates a face delimiter on a camera display screen, the delimiter surrounding the initial position of the image of a the face on the screen. The device is arranged to indicate thereafter to the user if the device departs from the movement along a predetermined concave path P with the optical axis of the device pointing towards the face, such indication being made by movement of the image of the face relative to the delimiter. The camera captures and stores a plurality of images at successive positions along the concave path.
摘要翻译：手持式数字图像捕获装置（数码相机）具有用户可选择的模式，其中，在该模式下，该装置在该装置的视野中检测到一个面部并在相机显示屏上产生一个面分隔符，该分隔符围绕屏幕上脸部图像的初始位置。该装置被布置成以后向使用者指示如果装置在装置的光轴指向脸部的情况下沿着预定的凹入路径P离开移动，则这种指示是通过脸部的图像相对于该脸部的运动而进行的分隔符摄像机在沿着凹入路径的连续位置拍摄并存储多个图像。

24. 发明申请

US20150262344A1 Method And System For Correcting A Distorted Input Image 有权
标题翻译：纠正输入失真图像的方法和系统
公开(公告)号：US20150262344A1
公开(公告)日：2015-09-17
申请号：US14728939
申请日：2015-06-02
申请人： FotoNation Limited
发明人： Piotr Stec , Alexei Pososin , Mihai Constantin Munteanu , Corneliu Zaharia
IPC分类号： G06T5/00 , H04N5/232
CPC分类号： G06T5/006 , G06T2207/10004 , G06T2207/20021 , H04N5/217 , H04N5/23229
摘要： A method for correcting a distorted input image comprises determining a local region of an image to be displayed and dividing said region into an array of rectangular tiles, each tile corresponding to a distorted tile with a non-rectangular boundary within said input image. For each tile of the local region, maximum and minimum memory address locations of successive rows of said input image sufficient to span said boundary of said distorted tile are determined. Successive rows of the distorted input from between said maximum and minimum addresses are read. Distortion of the non-rectangular portion of said distorted input image is corrected to provide a tile of a corrected output image which is stored.
摘要翻译：用于校正失真的输入图像的方法包括确定要显示的图像的局部区域，并将所述区域划分为矩形图块的阵列，每个图块对应于在所述输入图像内具有非矩形边界的失真图块。对于局部区域的每个瓦片，确定足以跨越所述失真瓦片的所述边界的所述输入图像的连续行的最大和最小存储器地址位置。读取从所述最大和最小地址之间的失真输入的连续行。纠正所述失真输入图像的非矩形部分的失真，以提供存储的校正输出图像的图块。

25. 发明申请

US20150178897A1 Method And System For Correcting A Distorted Input Image 审中-公开
标题翻译：纠正输入失真图像的方法和系统
公开(公告)号：US20150178897A1
公开(公告)日：2015-06-25
申请号：US14579771
申请日：2014-12-22
申请人： FotoNation Limited
发明人： Piotr Stec , Alexei Pososin , Mihai Constantin Munteanu , Corneliu Zaharia
IPC分类号： G06T5/00 , H04N5/232
CPC分类号： G06T5/001 , G06T5/006 , G06T2207/20021 , G06T2207/20172 , H04N5/23229
摘要： A method for correcting a distorted input image includes determining a local region of an image to be displayed and dividing the region into an array of rectangular tiles, each tile corresponding to a distorted tile with a non-rectangular boundary within the input image. For each tile of the local region, maximum and minimum memory address locations of successive rows of the input image sufficient to span the boundary of the distorted tile are determined. Successive rows of the distorted input from between the maximum and minimum addresses are read. Distortion of the non-rectangular portion of the distorted input image is corrected to provide a tile of a corrected output image which is stored.
摘要翻译：用于校正失真的输入图像的方法包括确定要显示的图像的局部区域，并将该区域划分为矩形瓦片的阵列，每个瓦片对应于输入图像内具有非矩形边界的失真瓦片。对于局部区域的每个瓦片，确定足够跨越失真瓦片的边界的输入图像的连续行的最大和最小存储器地址位置。读取从最大和最小地址之间的失真输入的连续行。纠正失真输入图像的非矩形部分的失真以提供存储的校正输出图像的图块。

26. 发明授权

US12143723B2 Method and system for camera motion blur reduction 有权
公开(公告)号：US12143723B2
公开(公告)日：2024-11-12
申请号：US18377040
申请日：2023-10-05
申请人： FotoNation Limited
发明人： Razvan Condorovici , Bogdan Petcu , Piotr Stec
IPC分类号： H04N23/68
CPC分类号： H04N23/6845 , H04N23/6811 , H04N23/6812 , H04N23/683
摘要： A method for reducing camera motion blur comprises, before acquiring an image frame for a video stream, a camera measurement unit measuring data related to a camera module motion during a time window; determining camera module motion based on the measured data and predicting a camera motion blur during acquisition of the image frame based at least on the determined camera module motion and the lens projection model; determining whether the predicted camera motion blur exceeds a threshold; in response to determining that the predicted camera motion blur exceeds the threshold, determining a reduction of the provisional exposure time determined to acquire the image frame so that the predicted camera motion blur reaches the threshold, determining whether a corresponding increase in the provisional gain determined to acquire the image frame is below a maximum gain value, adjusting the provisional exposure time and gain, and acquiring the image frame.

27. 发明授权

US11941897B2 Vehicle occupant monitoring system including an image acquisition device with a rolling shutter image sensor 有权
公开(公告)号：US11941897B2
公开(公告)日：2024-03-26
申请号：US17547060
申请日：2021-12-09
申请人： FotoNation Limited
发明人： Istvan Andorko , Petronel Bigioi , Piotr Stec
IPC分类号： G06V20/59 , H04N5/33 , H04N23/73 , H04N23/74
CPC分类号： G06V20/593 , H04N5/33 , H04N23/73 , H04N23/74
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.

28. 发明授权

US11610338B2 Method of controlling a camera 有权
公开(公告)号：US11610338B2
公开(公告)日：2023-03-21
申请号：US17214424
申请日：2021-03-26
申请人： FotoNation Limited
发明人： Piotr Stec
IPC分类号： G06T7/80 , H04N5/232
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.

29. 发明授权

US10701293B2 Method for compensating for off-axis tilting of a lens 有权
公开(公告)号：US10701293B2
公开(公告)日：2020-06-30
申请号：US16503034
申请日：2019-07-03
申请人： FotoNation Limited
发明人： Piotr Stec , Brian O'Sullivan
IPC分类号： H04N5/357 , G06T7/80
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.

30. 发明授权

US10587806B2 Method and apparatus for motion estimation 有权
公开(公告)号：US10587806B2
公开(公告)日：2020-03-10
申请号：US16298657
申请日：2019-03-11
申请人： FotoNation Limited
发明人： Petronel Bigioi , Peter Corcoran , Piotr Stec
IPC分类号： H04N19/53 , H04N5/232 , G06T7/223
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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