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

IPC: G06K9/36 ,  G06T5/50

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。

公开(公告)号：USD683184S1

公开(公告)日：2013-05-28

申请号：US29402072

申请日：2011-09-20

Applicant: Peng Lin

Designer： Peng Lin

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。

公开(公告)号：USD671786S1

公开(公告)日：2012-12-04

申请号：US29400051

申请日：2011-08-23

Applicant: Peng Lin

Designer： Peng Lin

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

IPC: G06K9/40 ,  H04N5/217 ,  H04N5/335

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。

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。

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

CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/17 ,  H04N19/60 ,  H04N19/80

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。

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

IPC: H04N5/21 ,  H04N5/14

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。

公开(公告)号：US07289163B2

公开(公告)日：2007-10-30

申请号：US10449189

申请日：2003-04-28

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/21

CPC classification number: H04N9/646 ,  G06T5/003 ,  G06T5/50 ,  G06T2207/10016 ,  G06T2207/10024 ,  G06T2207/20012 ,  G06T2207/20192 ,  H04N19/117 ,  H04N19/182 ,  H04N19/186 ,  H04N19/80

Abstract: An improved method for color transient enhancement in an input video frame of pixels. The luminance value of a current pixel is compared to that of neighboring pixels. A correction value is determined and the chrominance value of the current pixel is “pushed” towards the neighboring pixel that has a luminance value closest to that of the current pixel, by adding the correction value to the current pixel's chrominance value. The original video frame is also separately processed using a CTI method, and the current pixel's corrected chrominance value is combined with the corresponding pixel in the output of the CTI processing by soft switching unit to generate an output video frame that is an enhanced version of the input video frame.

Abstract translation: 一种用于像素的输入视频帧中的色彩瞬态增强的改进方法。 将当前像素的亮度值与相邻像素的亮度值进行比较。 通过将校正值与当前像素的色度值相加，确定当前像素的色度值朝向具有最接近当前像素的亮度值的相邻像素的“推”。 原始视频帧也使用CTI方法单独处理，并且当前像素的校正色度值与软切换单元在CTI处理的输出中的相应像素组合以产生作为增强版本的输出视频帧 输入视频帧。

公开(公告)号：US07271851B2

公开(公告)日：2007-09-18

申请号：US10345552

申请日：2003-01-16

Applicant: Peng Lin ,  Yeong-Taeg Kim

Inventor： Peng Lin ,  Yeong-Taeg Kim

IPC: H04N5/00 ,  H04N5/21 ,  H04N9/68 ,  G06K9/40

CPC classification number: H04N9/646

Abstract: A superior Color Transient Improvement technique is adaptive to the local image features, so that more natural color edge transition improvement can be accomplished. A gain control function is provided that depends on the local image feature so that different regions of the image can be treated differently. Further, a correction signal is controlled in such a way (by the local image feature) that neither undershoot nor overshoot occurs, eliminating the need for post-processing for undershoot/overshoot removal.

Abstract translation: 优异的色彩瞬态改进技术适用于局部图像特征，从而可以实现更自然的色彩边缘转换改进。 提供了取决于本地图像特征的增益控制功能，使得图像的不同区域可以被不同地对待。 此外，校正信号以这样的方式（通过局部图像特征）被控制，既不会发生下冲也不产生超调，因此不需要后处理用于下冲/过冲去除。