LED flicker reduction for high dynamic range imaging

    公开(公告)号:US11019277B2

    公开(公告)日:2021-05-25

    申请号:US16543760

    申请日:2019-08-19

    IPC分类号: H04N5/235

    摘要: 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.

    VOLTAGE CONTROL CIRCUIT
    3.
    发明申请
    VOLTAGE CONTROL CIRCUIT 有权
    电压控制电路

    公开(公告)号:US20150046733A1

    公开(公告)日:2015-02-12

    申请号:US14453608

    申请日:2014-08-06

    申请人: Yi-Peng Lin

    发明人: Yi-Peng Lin

    IPC分类号: G06F1/26 G06F1/32

    CPC分类号: G06F1/26 G06F1/32

    摘要: A voltage control circuit includes a processing unit, a power control circuit, a first impedance circuit, a first switch, and a current source. The power control circuit is used for outputting a core voltage to the processing unit. The first switch and the first impedance circuit are connected in parallel between the processing unit and the power control circuit, and they feedback a feedback voltage to the power control circuit. The current source is used for providing or extracting an operating current via the first impedance circuit or the first switch. The first switch is turned on and the processing unit receives a first core voltage when the processing unit operates at a normal mode. The first switch is turned off and the processing unit receives a second core voltage when the processing unit operates at an overvoltage mode.

    摘要翻译: 电压控制电路包括处理单元,功率控制电路,第一阻抗电路,第一开关和电流源。 功率控制电路用于向处理单元输出核心电压。 第一开关和第一阻抗电路并联连接在处理单元和功率控制电路之间,并将反馈电压反馈到功率控制电路。 电流源用于经由第一阻抗电路或第一开关提供或提取工作电流。 当处理单元以正常模式操作时,第一开关接通并且处理单元接收第一核心电压。 当处理单元以过压模式工作时,第一开关被关闭,并且处理单元接收第二核心电压。

    Fast intra mode prediction for a video encoder
    4.
    发明授权
    Fast intra mode prediction for a video encoder 有权
    用于视频编码器的快速帧内模式预测

    公开(公告)号:US08571100B2

    公开(公告)日:2013-10-29

    申请号:US11666061

    申请日:2005-10-19

    IPC分类号: H04B1/66

    摘要: There are provided video encoders and corresponding methods for encoding video data for an image that is divisible into macroblocks. A video encoder includes an encoder for performing into mode selection when encoding a current macroblock by testing a first subset of intra modes to compute a rate distortion cost, and utilizing the rate distortion cost to determine whether to terminate the intra mode selection and which additional intra modes, if any, are to be examined with respect to the current macroblock.

    摘要翻译: 提供了视频编码器和用于编码可分割为宏块的图像的视频数据的相应方法。 视频编码器包括编码器,用于通过测试帧内模式的第一子集来编码当前宏块进行模式选择,以计算速率失真成本,并利用速率失真成本来确定是否终止帧内模式选择以及哪些附加帧内 要对当前的宏块进行检查,如果有的话。

    METHOD FOR DETECTING DNA ADDUCTS IN SALIVA
    5.
    发明申请
    METHOD FOR DETECTING DNA ADDUCTS IN SALIVA 审中-公开
    检测SALIVA DNA提取物的方法

    公开(公告)号:US20130224755A1

    公开(公告)日:2013-08-29

    申请号:US13599246

    申请日:2012-08-30

    IPC分类号: C12Q1/68

    CPC分类号: C12Q1/6876 C12Q2600/166

    摘要: A method of detecting DNA adducts in saliva is disclosed herein. The method comprises the following steps: providing a salivary DNA; adding at least one isotope-labeled internal standard and a plurality of enzymes into the salivary DNA to hydrolyze the salivary DNA into a plurality of nucleosides; extracting the plurality of nucleosides by using a solid-phase extraction column; and detecting and quantifying at least one DNA adduct in the plurality of extracted nucleosides by utilizing a stable isotope dilution nano-flow liquid chromatography-nanospray ionization tandem mass spectrometry (LC-NSI/MS/MS).

    摘要翻译: 本文公开了检测唾液中的DNA加合物的方法。 该方法包括以下步骤:提供唾液DNA; 将至少一种同位素标记的内标和多个酶加入到唾液DNA中以将唾液DNA水解成多个核苷; 通过使用固相萃取柱提取多个核苷; 并利用稳定同位素稀释纳米流速液相色谱 - 纳米喷雾电离串联质谱(LC-NSI / MS / MS)检测和定量多个提取的核苷中的至少一种DNA加合物。

    Composition and process for preparing NIR shielding masterbatch and NIR shielding masterbatch and application thereof
    6.
    发明授权
    Composition and process for preparing NIR shielding masterbatch and NIR shielding masterbatch and application thereof 有权
    制备NIR屏蔽母粒和NIR屏蔽母料的组成和工艺及其应用

    公开(公告)号:US08449801B2

    公开(公告)日:2013-05-28

    申请号:US12851583

    申请日:2010-08-06

    IPC分类号: B29B9/06

    CPC分类号: G02B1/04 C08J5/00 D01F1/106

    摘要: Disclosed herein is a method for preparing a near infrared shielding masterbatch. The method includes the steps of preparing and compounding a composition, and then pelletizing the compounded composition. The composition includes at least one metallic ionic compound powder in an amount of about 1-25 wt %, a cross-linking agent in an amount of about 0.1-5 wt %, a thermoplastic polymer in an amount of about 67-98.7 wt %, an initiator in an amount of about 0.1-1 wt %, and a dispersing agent in an amount of about 0.1-2 wt %.

    摘要翻译: 本文公开了一种制备近红外屏蔽母料的方法。 该方法包括制备和混合组合物,然后将复合组合物造粒的步骤。 该组合物包含至少一种量为约1-25重量%的金属离子化合物粉末,约0.1-5重量%的交联剂,约67-98.7重量%的热塑性聚合物, ,约0.1-1重量%的引发剂和约0.1-2重量%的分散剂。

    Image sensors and image reconstruction methods for capturing high dynamic range images
    7.
    发明授权
    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:US08405750B2

    公开(公告)日:2013-03-26

    申请号:US12480651

    申请日:2009-06-08

    IPC分类号: H04N5/335 G03B7/00

    摘要: 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.

    摘要翻译: 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。

    METHOD AND APPARATUS FOR CAPTURING HIGH DYNAMIC RANGE IMAGES USING MULTI-FRAME INTERLACED EXPOSURE IMAGES
    10.
    发明申请
    METHOD AND APPARATUS FOR CAPTURING HIGH DYNAMIC RANGE IMAGES USING MULTI-FRAME INTERLACED EXPOSURE IMAGES 有权
    使用多帧交错曝光图像捕获高动态范围图像的方法和装置

    公开(公告)号:US20120274822A1

    公开(公告)日:2012-11-01

    申请号:US13170478

    申请日:2011-06-28

    IPC分类号: H04N5/335

    摘要: An imager includes an array of pixels arranged in rows and a control circuit for sequentially capturing first and second image frames from the array of pixels. The control circuit is configured to sequentially capture first and second pairs of adjacent rows of pixels during first and second exposure times, respectively, when capturing the first image frame. The control circuit is also configured to sequentially capture first and second pairs of adjacent rows of pixels during second and first exposure times, respectively, when capturing the second image frame. The first exposure times during the first and second frames are of similar duration; and the second exposure times during the first and second frames are of similar duration. The control circuit is configured to detect motion of an object upon combining the first and second image frames and, then, correct for the motion of the object.

    摘要翻译: 成像器包括排列成行的像素阵列和用于从像素阵列顺序捕获第一和第二图像帧的控制电路。 控制电路被配置为在捕获第一图像帧时分别在第一和第二曝光时间期间顺序捕获第一和第二对相邻像素行对。 控制电路还被配置为在捕获第二图像帧时分别在第二和第一曝光时间期间顺序捕获第一和第二对相邻像素行。 在第一和第二帧期间的第一曝光时间具有相似的持续时间; 并且第一和第二帧期间的第二曝光时间具有相似的持续时间。 控制电路被配置为在组合第一和第二图像帧时检测对象的运动,然后校正对象的运动。