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    ENHANCED HIGH-DYNAMIC-RANGE IMAGING AND TONE MAPPING
    1.
    发明申请
    ENHANCED HIGH-DYNAMIC-RANGE IMAGING AND TONE MAPPING 有权

    公开(公告)号：US20220036524A1

    公开(公告)日：2022-02-03

    申请号：US17500289

    申请日：2021-10-13

    Applicant: NVIDIA Corporation

    Inventor： Yining Deng ,  Eric Dujardin ,  Hamidreza Mirzaei Domabi ,  Sung Hyun Hwang

    IPC: G06T5/00

    Abstract: The various embodiments of the present disclosure are directed towards methods for tone mapping High-Dynamic-Range (HDR) image data, as well as controlling the brightness of the image encoded by HDR the image data and/or the tone-mapped image data. HDR image is captured. A tone mapping function for the HDR image data is generated. To generate the tone mapping function, control points are dynamically determined based on an analysis of the HDR image data. The tone mapping function is fit to the control points. The tone mapping function is a non-linear function, and is described by a curve in a plane. The shape of the curve is constrained by a line generated from a portion of the control points. The tone mapping function is applied to the HDR image data. A color-compression is applied to the tone mapped image data to generate Standard Dynamic Range or Low Dynamic Range image data.

    Enhanced high-dynamic-range imaging and tone mapping
    2.
    发明授权
    Enhanced high-dynamic-range imaging and tone mapping 有权

    公开(公告)号：US11182884B2

    公开(公告)日：2021-11-23

    申请号：US16526902

    申请日：2019-07-30

    Applicant: NVIDIA Corporation

    Inventor： Yining Deng ,  Eric Dujardin ,  Hamidreza Mirzaei Domabi ,  Sung Hyun Hwang

    IPC: G06T5/00

    Abstract: The various embodiments of the present disclosure are directed towards methods for tone mapping High-Dynamic-Range (HDR) image data, as well as controlling the brightness of the image encoded by HDR the image data and/or the tone-mapped image data. HDR image is captured. A tone mapping function for the HDR image data is generated. To generate the tone mapping function, control points are dynamically determined based on an analysis of the HDR image data. The tone mapping function is fit to the control points. The tone mapping function is a non-linear function, and is described by a curve in a plane. The shape of the curve is constrained by a line generated from a portion of the control points. The tone mapping function is applied to the HDR image data. A color-compression is applied to the tone mapped image data to generate Standard Dynamic Range or Low Dynamic Range image data.

    Enhanced high-dynamic-range imaging and tone mapping
    5.
    发明授权
    Enhanced high-dynamic-range imaging and tone mapping 有权

    公开(公告)号：US11704781B2

    公开(公告)日：2023-07-18

    申请号：US17500289

    申请日：2021-10-13

    Applicant: NVIDIA Corporation

    Inventor： Yining Deng ,  Eric Dujardin ,  Hamidreza Mirzaei Domabi ,  Sung Hyun Hwang

    IPC: G06T5/00

    CPC classification number: G06T5/009 ,  G06T2207/10024 ,  G06T2207/20208 ,  G06T2207/30252

    Abstract: The various embodiments of the present disclosure are directed towards methods for tone mapping High-Dynamic-Range (HDR) image data, as well as controlling the brightness of the image encoded by HDR the image data and/or the tone-mapped image data. HDR image is captured. A tone mapping function for the HDR image data is generated. To generate the tone mapping function, control points are dynamically determined based on an analysis of the HDR image data. The tone mapping function is fit to the control points. The tone mapping function is a non-linear function, and is described by a curve in a plane. The shape of the curve is constrained by a line generated from a portion of the control points. The tone mapping function is applied to the HDR image data. A color-compression is applied to the tone mapped image data to generate Standard Dynamic Range or Low Dynamic Range image data.

    ENHANCED HIGH-DYNAMIC-RANGE IMAGING AND TONE MAPPING
    6.
    发明申请
    ENHANCED HIGH-DYNAMIC-RANGE IMAGING AND TONE MAPPING 有权

    公开(公告)号：US20210035273A1

    公开(公告)日：2021-02-04

    申请号：US16526902

    申请日：2019-07-30

    Applicant: NVIDIA Corporation

    Inventor： Yining Deng ,  Eric Dujardin ,  Hamidreza Mirzaei Domabi ,  Sung Hyun Hwang

    IPC: G06T5/00

    Abstract: The various embodiments of the present disclosure are directed towards methods for tone mapping High-Dynamic-Range (HDR) image data, as well as controlling the brightness of the image encoded by HDR the image data and/or the tone-mapped image data. HDR image is captured. A tone mapping function for the HDR image data is generated. To generate the tone mapping function, control points are dynamically determined based on an analysis of the HDR image data. The tone mapping function is fit to the control points. The tone mapping function is a non-linear function, and is described by a curve in a plane. The shape of the curve is constrained by a line generated from a portion of the control points. The tone mapping function is applied to the HDR image data. A color-compression is applied to the tone mapped image data to generate Standard Dynamic Range or Low Dynamic Range image data.

    SHADING CALIBRATION FOR RADIAL SENSOR LENSES
    7.
    发明公开
    SHADING CALIBRATION FOR RADIAL SENSOR LENSES 审中-公开

    公开(公告)号：US20240265575A1

    公开(公告)日：2024-08-08

    申请号：US18165120

    申请日：2023-02-06

    Applicant: NVIDIA Corporation

    Inventor： Yongshen NI ,  Eric Dujardin

    IPC: G06T7/80 ,  H04N17/00 ,  H04N25/61

    CPC classification number: G06T7/80 ,  H04N17/002 ,  H04N25/61

    Abstract: In various examples, systems and methods for calibration for sensor lens shading using non-radial correction of residual radial shading error are provided. In some embodiments, a calibration flow includes computation of calibration parameters corresponding to radial lens shading correction, and computation of calibration parameters corresponding to non-radial lens shading correction. A lens shading profile may be computed that defines a gain mapping of lens shading effect appearing in an image frame of calibration sensor data. Parameters for radial lens shading correction may be computed from the lens shading profile, and parameters for non-radial lens shading correction may be computed based a residual shading profile generated from the radial lens shading correction. Calibration parameters for radial and non-radial lens shading correction may be used to calibrate sensor data captured by an image sensor module to correct for lens shading.

    WEIGHTED NORMALIZED AUTOMATIC WHITE BALANCING
    8.
    发明申请
    WEIGHTED NORMALIZED AUTOMATIC WHITE BALANCING 有权

    公开(公告)号：US20220414831A1

    公开(公告)日：2022-12-29

    申请号：US17903290

    申请日：2022-09-06

    Applicant: NVIDIA Corporation

    Inventor： Hamidreza Mirzaei Domabi ,  Eric Dujardin ,  Animesh Khemka ,  Yining Deng

    IPC: G06T5/00 ,  B60R11/04 ,  G05B13/02 ,  G05D1/00 ,  G06N3/04 ,  G05D1/02 ,  G06T7/90

    Abstract: In order to more accurately white balance an image, weightings can be determined for pixels of an image when computing an illuminant color value of the image and/or a scene. The weightings can be based at least in part on the Signal-to-Noise Ratio (SNR) of the pixels. The SNR may be actual SNR or SNR estimated from brightness levels of the pixels. SNR weighting (e.g., SNR adjustment) may reduce the effect of pixels with high noise on the computed illuminant color value. For example, one or more channel values of the illuminant color value can be determined based on the weightings and color values of the pixels. One or more color gain values can be determined based on the one or more channel values of the illuminant color value and used to white balance the image.

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