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公开(公告)号：US11019277B2
公开(公告)日：2021-05-25
申请号：US16543760
申请日：2019-08-19
Applicant: Liangtao Jiang , Peng Lin
Inventor： Liangtao Jiang , Peng Lin
IPC: H04N5/235
Abstract: A system for capturing a high dynamic range (HDR) image comprises an image sensor comprising a split pixel including a first pixel having higher effective gain and a second pixel having lower effective gain. The second pixels exposed with a capture window capture at least a pulse emitted by a light emitting diode (LED) controlled by a pulse width modulation. A first HDR image is produced by a combination including an image produced by the second pixels, and images produced by multiple exposures of the first pixels. A weight map of LED flicker correction is generated from the difference of the image produced by second pixels and the images produced by the first pixels, and the flicker areas in the first HDR image are corrected with the weight map and the image from the second pixels.
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公开(公告)号：US20200177788A1
公开(公告)日：2020-06-04
申请号：US16543760
申请日：2019-08-19
Applicant: Liangtao Jiang , Peng Lin
Inventor： Liangtao Jiang , Peng Lin
IPC: H04N5/235
Abstract: A system for capturing a high dynamic range (HDR) image comprises an image sensor comprising a split pixel including a first pixel having higher effective gain and a second pixel having lower effective gain. The second pixels exposed with a capture window capture at least a pulse emitted by a light emitting diode (LED) controlled by a pulse width modulation. A first HDR image is produced by a combination including an image produced by the second pixels, and images produced by multiple exposures of the first pixels. A weight map of LED flicker correction is generated from the difference of the image produced by second pixels and the images produced by the first pixels, and the flicker areas in the first HDR image are corrected with the weight map and the image from the second pixels.
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3.发明授权公开(公告)号：US08873882B2
公开(公告)日：2014-10-28
申请号：US13074976
申请日：2011-03-29
Applicant: Johannes Solhusvik , Sohrab Yaghmai , Peng Lin
Inventor： Johannes Solhusvik , Sohrab Yaghmai , Peng Lin
CPC classification number: G06T5/50 , G06T2207/10144 , G06T2207/20208
Abstract: Multiple-exposure high dynamic range image processing may be performed that filters pixel values that are distorted by blooming from nearby saturated pixels. Pixel values that are near saturated pixels may be identified as pixels that may be affected by blooming. The contributions from those pixels may be minimized when producing a final image. Multiple-exposure images may be linearly combined to produce a final high dynamic range image. Pixel values that may be distorted by blooming may be given less weight in the linear combination.
Abstract translation: 可以执行多次曝光高动态范围图像处理，其对来自附近的饱和像素的渐变而失真的像素值进行滤波。 靠近饱和像素的像素值可以被识别为可能受到开花影响的像素。 当产生最终图像时，这些像素的贡献可能被最小化。 多曝光图像可以被线性组合以产生最终的高动态范围图像。 在线性组合中可能会发生可能由于起霜而变形的像素值。
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公开(公告)号：US08391598B2
公开(公告)日：2013-03-05
申请号：US12985310
申请日：2011-01-05
Applicant: Peng Lin
Inventor： Peng Lin
IPC: G06K9/00
CPC classification number: G06T5/008 , G06T2207/10016 , G06T2207/20012 , G06T2207/20208
Abstract: Adaptive local tone mapping may be used to convert a high dynamic range image to a low dynamic range image. Tone mapping may be performed on an on a Bayer domain image. A high dynamic range image may be filtered to produce a luminance signal. An illumination component of the luminance signal may be compressed. A reflectance component of the luminance signal may be sharpened. After the luminance signal has been processed, it may be used in producing an output image in the Bayer domain that has a lower dynamic range than the input image. The output Bayer domain image may be demosaiced to produce an RGB image. Tone-mapping may be performed with a tone-mapping processor.
Abstract translation: 自适应局部色调映射可用于将高动态范围图像转换为低动态范围图像。 色调映射可以在拜耳域图像上执行。 可以对高动态范围图像进行滤波以产生亮度信号。 可以压缩亮度信号的照明分量。 亮度信号的反射分量可以被削尖。 在亮度信号被处理之后，它可以用于产生具有比输入图像低的动态范围的拜耳域中的输出图像。 输出拜耳域图像可以被去马赛克以产生RGB图像。 音调映射可以用色调映射处理器来执行。
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Patent Agency Ranking
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7.发明申请公开(公告)号：US20100310190A1
公开(公告)日：2010-12-09
申请号：US12480970
申请日：2009-06-09
Applicant: Peng Lin
Inventor： Peng Lin
CPC classification number: H04N5/35536 , H04N5/35509 , H04N5/357
Abstract: This is generally directed to systems and methods for noise reduction in high dynamic range (“HDR”) imaging systems. In some embodiments, multiple images of the same scene can be captured, where each of the images is exposed for a different amount of time. An HDR image may be created by suitably combining the images. However, the signal-to-noise ratio (“SNR”) curve of the resulting HDR image can have discontinuities in sections of the SNR curve corresponding to shifts between different exposure times. Accordingly, in some embodiments, a noise model for the HDR image can be created that takes into account these discontinuities in the SNR curve. For example, a noise model can be created that smoothes the discontinuities of the SNR curve into a continuous function. This noise model may then be used with a Bayer Filter or any other suitable noise filter to remove noise from the HDR image.
Abstract translation: 这通常涉及用于高动态范围（“HDR”）成像系统中降噪的系统和方法。 在一些实施例中，可以捕获相同场景的多个图像，其中每个图像被曝光不同的时间量。 可以通过适当地组合图像来创建HDR图像。 然而，所得HDR图像的信噪比（“SNR”）曲线可以在对应于不同曝光时间之间的偏移的SNR曲线的部分中具有不连续性。 因此，在一些实施例中，可以创建用于HDR图像的噪声模型，其考虑SNR曲线中的这些不连续性。 例如，可以创建将SNR曲线的不连续性平滑成连续函数的噪声模型。 然后可以将该噪声模型与拜耳滤波器或任何其它合适的噪声滤波器一起使用以从HDR图像中去除噪声。
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8.发明申请IMAGE SENSORS AND IMAGE RECONSTRUCTION METHODS FOR CAPTURING HIGH DYNAMIC RANGE IMAGES 有权用于捕获高动态范围图像的图像传感器和图像重建方法公开(公告)号：US20100309333A1
公开(公告)日：2010-12-09
申请号：US12480651
申请日：2009-06-08
Applicant: Scott Smith , Peng Lin , Christopher Zeleznik , Laura Savidge
Inventor： Scott Smith , Peng Lin , Christopher Zeleznik , Laura Savidge
IPC: H04N5/235
CPC classification number: H04N9/045 , H04N5/235 , H04N5/2355 , H04N2209/046
Abstract: High dynamic range image sensors and image reconstruction methods for capturing high dynamic range images. An image sensor that captures high dynamic range images may include an array of pixels having two sets of pixels, each of which is used to capture an image of a scene. The two sets of pixels may be interleaved together. As an example, the first and second sets of pixels may be formed in odd-row pairs and even-row pairs of the array, respectively. The first set of pixels may use a longer exposure time than the second set of pixels. The exposures of the two sets of pixels may at least partially overlap in time. Image processing circuitry in the image sensors or an associated electronic device may de-interlace the two images and may combine the de-interlaced images to form a high dynamic range image.
Abstract translation: 高动态范围图像传感器和用于捕获高动态范围图像的图像重建方法。 捕获高动态范围图像的图像传感器可以包括具有两组像素的像素阵列，每组像素用于捕获场景的图像。 两组像素可以交错在一起。 作为示例，第一和第二组像素可以分别形成为阵列的奇数行和偶数行。 第一组像素可以使用比第二组像素更长的曝光时间。 两组像素的曝光可能在时间上至少部分重叠。 图像传感器或相关联的电子设备中的图像处理电路可以对两个图像进行去隔行扫描，并且可以组合去隔行图像以形成高动态范围图像。
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9.发明授权公开(公告)号：US07657098B2
公开(公告)日：2010-02-02
申请号：US11121819
申请日：2005-05-02
Applicant: Peng Lin , Yeong-Taeg Kim , Seong-Joo Lee
Inventor： Peng Lin , Yeong-Taeg Kim , Seong-Joo Lee
IPC: G06K9/48
Abstract: A ringing area detector classifies the input image into two regions: a mosquito noise region (i.e. filtering region) and a non-mosquito noise region (i.e. non-filtering region), and uses this classification information to adaptively remove the mosquito noise in a mosquito noise reduction system. The mosquito noise reduction system includes a ringing area detector, a local noise power estimator, a smoothing filter, and a mixer. The ringing area detector includes an edge detector, a near edge detector, a texture detector, and a filtering region decision block. The ringing detection block detects the ringing area where the smoothing filter is to be applied. The local noise power estimator controls the filter strength of the smoothing filter. The smoothing filter smoothes the input image. The mixer mixes the smoothed image and the original image properly based on the region information from the ringing area detection block.
Abstract translation: 振铃区域检测器将输入图像分为两个区域：蚊子噪声区域（即滤波区域）和非蚊子区域（即非滤波区域），并使用该分类信息自适应地消除蚊子中的蚊子噪声 降噪系统 蚊式降噪系统包括振铃区域检测器，局部噪声功率估计器，平滑滤波器和混频器。 振铃区域检测器包括边缘检测器，近边缘检测器，纹理检测器和滤波区域判定块。 振铃检测块检测要应用平滑滤波器的振铃区域。 本地噪声功率估计器控制平滑滤波器的滤波器强度。 平滑滤波器平滑输入图像。 混合器根据来自振铃区域检测块的区域信息正确地混合平滑图像和原始图像。
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公开(公告)号：US07330218B2
公开(公告)日：2008-02-12
申请号：US10934025
申请日：2004-09-02
Applicant: Peng Lin , Yeong-Taeg Kim
Inventor： Peng Lin , Yeong-Taeg Kim
CPC classification number: H04N5/21 , Y10S348/91
Abstract: A video noise reduction system for reducing video noise in a sequence of video frames. In the video noise reduction system, a temporal filter computes multiple temporal average values for the video frames in different temporal directions. A motion detector computes multiple motion signal values for the video frames in different temporal directions. Finally, a control unit selects one of the temporal average values based on the motion signal values as output.
Abstract translation: 一种用于降低视频帧序列中的视频噪声的视频降噪系统。 在视频噪声降低系统中，时间滤波器在不同的时间方向上计算视频帧的多个时间平均值。 运动检测器在不同的时间方向上计算视频帧的多个运动信号值。 最后，控制单元基于运动信号值作为输出来选择时间平均值之一。
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