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    Enhanced high-dynamic-range imaging and tone mapping
    4.
    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
    5.
    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.

    MULTIPLE IMAGE CAPTURE AND PROCESSING
    6.
    发明申请
    MULTIPLE IMAGE CAPTURE AND PROCESSING 审中-公开
    多图像捕获和处理

    公开(公告)号：US20150085159A1

    公开(公告)日：2015-03-26

    申请号：US14032569

    申请日：2013-09-20

    Applicant: NVIDIA Corporation

    Inventor： Abhinav Sinha ,  Yining Deng

    IPC: H04N5/77 ,  H04N5/232 ,  H04N5/235 ,  H04N1/21 ,  H04N9/73

    CPC classification number: H04N5/23212 ,  H04N1/2112 ,  H04N1/3871 ,  H04N5/23232 ,  H04N5/2353 ,  H04N5/2355 ,  H04N2201/0084

    Abstract: Various embodiments relating to image capture with a camera and generation of a processed image having desired image characteristics are provided. In one embodiment, a plurality of images of a scene captured by a camera and associated image metadata are stored. Image metadata associated with each image of the plurality of images includes image characteristics of that image, and each image has a different set of values of image characteristics. A request for an image of the scene that most closely matches a specified image characteristic profile that defines one or more values of one or more image characteristics is received. The image characteristic profile is compared to image metadata of each of the plurality of images. A processed image generated from the plurality of images of the scene having image characteristics that most closely match the image characteristic profile based on the comparison is provided.

    Abstract translation: 提供了与摄像机的图像捕捉有关的各种实施例以及产生具有所需图像特征的处理图像。 在一个实施例中，存储由相机拍摄的场景的多个图像和相关联的图像元数据。 与多个图像的每个图像相关联的图像元数据包括该图像的图像特征，并且每个图像具有不同的图像特征值集合。 接收与定义一个或多个图像特征的一个或多个值最接近匹配的指定图像特征曲线的场景图像的请求。 将图像特征曲线与多个图像中的每一个的图像元数据进行比较。 提供了从具有与图像特性曲线最匹配的图像特征的场景的多个图像生成的经处理图像。

    Weighted normalized automatic white balancing
    7.
    发明授权
    Weighted normalized automatic white balancing 有权

    公开(公告)号：US11436704B2

    公开(公告)日：2022-09-06

    申请号：US16742322

    申请日：2020-01-14

    Applicant: NVIDIA Corporation

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

    IPC: G06K9/00 ,  G06T5/00 ,  G06T7/90 ,  G05B13/02 ,  G06N3/04 ,  G05D1/00 ,  G05D1/02 ,  B60R11/04

    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.

    WEIGHTED NORMALIZED AUTOMATIC WHITE BALANCING
    8.
    发明申请
    WEIGHTED NORMALIZED AUTOMATIC WHITE BALANCING 审中-公开

    公开(公告)号：US20200226720A1

    公开(公告)日：2020-07-16

    申请号：US16742322

    申请日：2020-01-14

    Applicant: NVIDIA Corporation

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

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

    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.

    WEIGHTED NORMALIZED AUTOMATIC WHITE BALANCING
    9.
    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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