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11. 发明申请

US20060192888A1 SYSTEM AND METHOD FOR AUTOMATIC EXPOSURE CONTROL AND WHITE BALANCING FOR CMOS SENSORS 有权
标题翻译：用于CMOS传感器的自动曝光控制和白平衡的系统和方法
公开(公告)号：US20060192888A1
公开(公告)日：2006-08-31
申请号：US11382627
申请日：2006-05-10
申请人： Mihail Milkov , David Standley , Amit Mittra
发明人： Mihail Milkov , David Standley , Amit Mittra
IPC分类号： H04N5/235
CPC分类号： H04N5/374 , H04N5/2351 , H04N5/347 , H04N5/37452
摘要： A system and method for averaging incident light on plural pixels using a CMOS sensor is provided. The process includes resetting all pixels in a given region during a reset phase; and reading a voltage of a floating reset node as a function of time during a measurement phase. During the reset phase, an access select signal and a reset voltage are both high. The measurement phase begins when the access select signal is low and the reset voltage is still high. The system and method may be used to perform automatic exposure control and automatic white balancing operations.
摘要翻译：提供一种使用CMOS传感器平均多个像素上的入射光的系统和方法。该过程包括在复位阶段期间复位给定区域中的所有像素; 并且在测量阶段期间读取作为时间的函数的浮动复位节点的电压。在复位阶段，访问选择信号和复位电压都很高。当访问选择信号为低电平且复位电压仍为高电平时，测量阶段开始。该系统和方法可用于执行自动曝光控制和自动白平衡操作。

12. 发明授权

US08260046B2 Method for pixel color correction and pixel color correcting apparatus thereof 有权
标题翻译：像素颜色校正方法及其像素颜色校正装置
公开(公告)号：US08260046B2
公开(公告)日：2012-09-04
申请号：US12577212
申请日：2009-10-12
申请人： Miaohong Shi , Amit Mittra
发明人： Miaohong Shi , Amit Mittra
IPC分类号： G06K9/00
CPC分类号： H04N9/67 , H04N9/77
摘要： A method for pixel color correction includes the steps of determining a gray degree of a designated pixel; generating an adjusted color correction matrix according to the gray degree of the designated pixel; and applying the adjusted color correction matrix to the designated pixel to correct color errors of the designated pixel. The gray degree is generated according to a ratio of the chrominance information to the luminance information. A weighted sum of a reference color correction matrix and a unity matrix is calculated to generate the adjusted color correction matrix, and weighting factors of the reference color correction matrix and the unity matrix are determined by the gray degree, wherein the unity matrix is a fundamental matrix without color correction.
摘要翻译：用于像素颜色校正的方法包括以下步骤：确定指定像素的灰度; 根据指定像素的灰度生成调整后的色彩校正矩阵; 以及将所调整的颜色校正矩阵应用于所述指定的像素，以校正所述指定像素的颜色误差。根据色度信息与亮度信息的比率生成灰度。计算参考颜色校正矩阵和单位矩阵的加权和以生成调整后的颜色校正矩阵，并且通过灰度来确定参考颜色校正矩阵和单位矩阵的加权因子，其中，单位矩阵是基本的矩阵无色校正。

13. 发明授权

US08253827B2 Signal chain of an imaging system 有权
标题翻译：成像系统的信号链
公开(公告)号：US08253827B2
公开(公告)日：2012-08-28
申请号：US12555654
申请日：2009-09-08
申请人： Chih-Min Liu , Amit Mittra , Chi-Shao Lin
发明人： Chih-Min Liu , Amit Mittra , Chi-Shao Lin
IPC分类号： H04N9/64 , H04N5/235 , H04N5/228
CPC分类号： H04N5/361
摘要： A signal chain of an imaging system is disclosed. The system includes three circuit stages. The first circuit stage includes a programmable gain amplifier (PGA) and a black level compensation (BLC) circuit that form a BLC loop. The second circuit stage includes an analog-to-digital converter (ADC), where a dark signal offset is added at an input of the ADC. The third circuit stage includes a digital gain circuit and a digital loop that makes a final output of the imaging system settle on a target level in the BLC mode.
摘要翻译：公开了一种成像系统的信号链。该系统包括三个电路级。第一电路级包括形成BLC回路的可编程增益放大器（PGA）和黑电平补偿（BLC）电路。第二电路级包括模数转换器（ADC），其中在ADC的输入处加上暗信号偏移。第三电路级包括数字增益电路和使得成像系统的最终输出在BLC模式下达到目标电平的数字环路。

14. 发明申请

US20110085729A1 DE-NOISING METHOD AND RELATED APPARATUS FOR IMAGE SENSOR 审中-公开
标题翻译：用于图像传感器的去噪方法和相关装置
公开(公告)号：US20110085729A1
公开(公告)日：2011-04-14
申请号：US12577210
申请日：2009-10-12
申请人： Miaohong Shi , Amit Mittra
发明人： Miaohong Shi , Amit Mittra
IPC分类号： G06K9/40 , H04N5/217
CPC分类号： H04N9/045 , H04N5/3572 , H04N2209/045
摘要： A de-noising method includes: comparing a pixel value of a target pixel with pixel values of a plurality of nearby pixels, wherein each of the target pixel and the nearby pixels corresponds to a specific color component; for each nearby pixel of the nearby pixels, checking if a difference between the pixel value of the target pixel and a pixel value of a nearby pixel of the nearby pixels is smaller than a specific noise threshold value, and when the difference between the pixel value of the target pixel and the pixel value of the nearby pixel is smaller than the specific noise threshold value, setting the nearby pixel as a similar nearby pixel; and updating the pixel value of the target pixel according to the pixel value of the target pixel and a pixel value of each similar nearby pixel.
摘要翻译：去噪方法包括：将目标像素的像素值与多个附近像素的像素值进行比较，其中目标像素和附近像素中的每一个对应于特定颜色分量; 对于附近像素的每个附近像素，检查目标像素的像素值与附近像素的附近像素的像素值之间的差是否小于特定噪声阈值，并且当像素值并且附近像素的像素值小于特定噪声阈值，将附近像素设置为类似的邻近像素; 以及根据目标像素的像素值和每个类似的相邻像素的像素值来更新目标像素的像素值。

15. 发明授权

US07728897B2 System and method for automatic exposure control and white balancing for CMOS sensors 有权
标题翻译：用于CMOS传感器的自动曝光控制和白平衡的系统和方法
公开(公告)号：US07728897B2
公开(公告)日：2010-06-01
申请号：US11382627
申请日：2006-05-10
申请人： Mihail M. Milkov , David Standley , Amit Mittra
发明人： Mihail M. Milkov , David Standley , Amit Mittra
IPC分类号： H04N3/14 , H04N5/335 , H01L27/00
CPC分类号： H04N5/374 , H04N5/2351 , H04N5/347 , H04N5/37452
摘要： A system and method for averaging incident light on plural pixels using a CMOS sensor is provided. The process includes resetting all pixels in a given region during a reset phase; and reading a voltage of a floating reset node as a function of time during a measurement phase. During the reset phase, an access select signal and a reset voltage are both high. The measurement phase begins when the access select signal is low and the reset voltage is still high. The system and method may be used to perform automatic exposure control and automatic white balancing operations.
摘要翻译：提供一种使用CMOS传感器平均多个像素上的入射光的系统和方法。该过程包括在复位阶段期间复位给定区域中的所有像素; 并且在测量阶段期间读取作为时间的函数的浮动复位节点的电压。在复位阶段，访问选择信号和复位电压都很高。当访问选择信号为低电平且复位电压仍为高电平时，测量阶段开始。该系统和方法可用于执行自动曝光控制和自动白平衡操作。

16. 发明申请

US20090295965A1 METHOD AND CIRCUIT FOR DRIVING ACTIVE PIXELS IN A CMOS IMAGER DEVICE 审中-公开
标题翻译：用于在CMOS成像器件中驱动有源像素的方法和电路
公开(公告)号：US20090295965A1
公开(公告)日：2009-12-03
申请号：US12129900
申请日：2008-05-30
申请人： Desmond Yu Hin Cheung , Amit Mittra , Chi-Shao Lin
发明人： Desmond Yu Hin Cheung , Amit Mittra , Chi-Shao Lin
IPC分类号： H04N5/335 , H01L27/146
CPC分类号： H04N5/3745 , H01L27/14641 , H04N5/357
摘要： One embodiment of the present invention describes a pixel circuit that comprises at least one photodiode, a first transistor coupled between the photodiode and a floating diffusion node, a second transistor coupled between the floating diffusion node and a modifiable driving voltage signal, and a third transistor having a gate coupled to the floating diffusion node, a source coupled to a signal output, and a drain coupled to a constant voltage. Another embodiment of the present invention provides a method for driving the pixel circuit, which comprises resetting the photodiode and the floating diffusion node, exposing the photodiode to light to accumulate charges, selecting the pixel circuit by switching the driving voltage signal from a first voltage level to a second voltage level, retrieving a reference voltage from the selected pixel circuit, and retrieving an image signal from the selected pixel circuit corresponding to the accumulated charges.
摘要翻译：本发明的一个实施例描述了一种像素电路，其包括至少一个光电二极管，耦合在光电二极管和浮动扩散节点之间的第一晶体管，耦合在浮动扩散节点和可修改驱动电压信号之间的第二晶体管，以及第三晶体管具有耦合到浮动扩散节点的栅极，耦合到信号输出的源极和耦合到恒定电压的漏极。本发明的另一个实施例提供了一种用于驱动像素电路的方法，该方法包括复位光电二极管和浮动扩散节点，将光电二极管暴露于光以累积电荷，通过从第一电压电平切换驱动电压信号来选择像素电路获取第二电压电平，从所选择的像素电路检索参考电压，以及从对应于累积电荷的所选择的像素电路中检索图像信号。

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