-
21.发明授权Multi-target automatic exposure and gain control based on pixel intensity distribution 有权基于像素强度分布的多目标自动曝光和增益控制公开(公告)号：US08982238B2
公开(公告)日：2015-03-17
申请号：US13933674
申请日：2013-07-02
Applicant: OmniVision Technologies, Inc.
Inventor： Chengming Liu , Jizhang Shan , Donghui Wu
CPC classification number: H04N5/2352 , H04N5/2356
Abstract: An example method of multi-target automatic exposure and gain control based on pixel intensity distribution includes capturing a series of digital images with an image sensor. As the series of digital images are captured, exposure time and/or gain are adjusted to adjust a mean intensity value of the digital images until a target mean intensity value is reached. The method includes dynamically selecting the target mean intensity value from a plurality of target mean intensity values based on a relative number of pixels, in each captured digital image, that have an intensity value that falls outside a range of intensity values.
Abstract translation: 基于像素强度分布的多目标自动曝光和增益控制的示例方法包括用图像传感器捕获一系列数字图像。 当捕获一系列数字图像时，调整曝光时间和/或增益以调整数字图像的平均强度值，直到达到目标平均强度值。 该方法包括基于在每个捕获的数字图像中具有落在强度值范围之外的强度值的像素的相对数目，从多个目标平均强度值中动态地选择目标平均强度值。
-
公开(公告)号：US20140340549A1
公开(公告)日：2014-11-20
申请号：US13950970
申请日：2013-07-25
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Tiejun Dai , Eiichi Funatsu , Donghui Wu , Zheng Yang , Xiao Xie
IPC: H04N5/335
CPC classification number: H04N5/335 , H04N5/23212
Abstract: A method of focusing an image sensor includes scanning a first portion of an image frame from an image sensor a first time at a first rate to produce first focus data. A second portion of the image frame from the image sensor is scanned at a second rate to read image data from the second portion. The first rate is greater than the second rate. The first portion of the image frame is scanned a second time at the first rate to produce second focus data. The first focus data and the second focus data are compared, and the focus of a lens is adjusted in response to the comparison of the first focus data and the second focus data.
Abstract translation: 聚焦图像传感器的方法包括以第一速率首先从图像传感器扫描图像帧的第一部分以产生第一焦点数据。 以第二速率扫描来自图像传感器的图像帧的第二部分，以从第二部分读取图像数据。 第一个比率大于第二个比率。 以第一速率第二次扫描图像帧的第一部分以产生第二焦点数据。 比较第一焦点数据和第二焦点数据，并且响应于第一焦点数据和第二焦点数据的比较来调整透镜的焦点。
-
公开(公告)号：US10425599B2
公开(公告)日：2019-09-24
申请号：US15421949
申请日：2017-02-01
Applicant: OmniVision Technologies, Inc.
Inventor： Sarvesh Swami , Donghui Wu
Abstract: A method for generating an HDR image includes (i) generating, from a plurality of single-exposure images of a scene, having a respective one of a plurality of exposure values, a sharpness map of sharpness values of the single-exposure images, and (ii) generating, from the plurality of single-exposure images, an exposure-value map of composite exposure values of the single-exposure images. The method also includes (iii) determining an optimal exposure value from the sharpness map and the exposure-value map, and (iv) generating the HDR image by combining a reference image of the scene, captured with the optimal exposure value, and at least two of the plurality of single-exposure images. An exposure selector for generating an HDR image, from the plurality of single-exposure images, includes a memory and a microprocessor. The memory stores non-transitory computer-readable instructions and is adapted to store the plurality of single-exposure images. The microprocessor is adapted to execute the aforementioned method.
-
公开(公告)号：US10015388B2
公开(公告)日：2018-07-03
申请号：US15256368
申请日：2016-09-02
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Tiejun Dai , Eiichi Funatsu , Donghui Wu , Zheng Yang , Xiao Xie
CPC classification number: H04N5/23212 , H04N5/243 , H04N5/3765 , H04N5/378
Abstract: A method of focusing an image sensor includes scanning a first portion of an image frame from an image sensor a first time at a first rate to produce first focus data. A second portion of the image frame from the image sensor is scanned at a second rate to read image data from the second portion. The first rate is greater than the second rate. The first portion of the image frame is scanned a second time at the first rate to produce second focus data. The first focus data and the second focus data are compared, and the focus of a lens is adjusted in response to the comparison of the first focus data and the second focus data.
-
Patent Agency Ranking
公开(公告)号：US09900527B2
公开(公告)日：2018-02-20
申请号：US15064546
申请日：2016-03-08
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Timofey Uvarov , Sarvesh Swami , Donghui Wu
CPC classification number: H04N5/35581 , G06T5/009 , G06T2207/20208 , H04N5/2355 , H04N5/265 , H04N5/378
Abstract: An imaging system includes an image sensor configured to capture a sequence of images including at least one low dynamic range (LDR) image and at least one high dynamic range (HDR) image. The imaging system also includes readout circuitry. The readout circuitry is coupled to read out image data captured by the image sensor. A processor is coupled to the readout circuitry to receive image data corresponding to the at least one LDR image and image data corresponding to the at least one HDR image. The processor is configured to combine high frequency image data extracted from image data corresponding to the at least one LDR image with low frequency image data extracted from image data corresponding to the at least one HDR image to form a composite image.
-
公开(公告)号：US09462179B2
公开(公告)日：2016-10-04
申请号：US14835503
申请日：2015-08-25
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Tiejun Dai , Eiichi Funatsu , Donghui Wu , Zheng Yang , Xiao Xie
CPC classification number: H04N5/23212 , H04N5/243 , H04N5/3765 , H04N5/378
Abstract: A method of focusing an image sensor includes scanning a first portion of an image frame from an image sensor a first time at a first rate to produce first focus data. A second portion of the image frame from the image sensor is scanned at a second rate to read image data from the second portion. The first rate is greater than the second rate. The first portion of the image frame is scanned a second time at the first rate to produce second focus data. The first focus data and the second focus data are compared, and the focus of a lens is adjusted in response to the comparison of the first focus data and the second focus data.
-
公开(公告)号：US09124823B2
公开(公告)日：2015-09-01
申请号：US13950970
申请日：2013-07-25
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Tiejun Dai , Eiichi Funatsu , Donghui Wu , Zheng Yang , Xiao Xie
CPC classification number: H04N5/335 , H04N5/23212
Abstract: A method of focusing an image sensor includes scanning a first portion of an image frame from an image sensor a first time at a first rate to produce first focus data. A second portion of the image frame from the image sensor is scanned at a second rate to read image data from the second portion. The first rate is greater than the second rate. The first portion of the image frame is scanned a second time at the first rate to produce second focus data. The first focus data and the second focus data are compared, and the focus of a lens is adjusted in response to the comparison of the first focus data and the second focus data.
Abstract translation: 聚焦图像传感器的方法包括以第一速率首先从图像传感器扫描图像帧的第一部分以产生第一焦点数据。 以第二速率扫描来自图像传感器的图像帧的第二部分，以从第二部分读取图像数据。 第一个比率大于第二个比率。 以第一速率第二次扫描图像帧的第一部分以产生第二焦点数据。 比较第一焦点数据和第二焦点数据，并且响应于第一焦点数据和第二焦点数据的比较来调整透镜的焦点。
-
公开(公告)号：US20150002707A1
公开(公告)日：2015-01-01
申请号：US14249006
申请日：2014-04-09
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Donghui Wu
IPC: H04N5/378
CPC classification number: H04N5/332 , H01L27/14621 , H04N9/045 , H04N2209/045
Abstract: Embodiments of a color filter array include a plurality of tiled minimal repeating units, each minimal repeating unit comprising an M×N set of individual filters, and each individual filter in the set having a photoresponse selected from among four different photoresponses. Each minimal repeating unit includes a checkerboard pattern of filters of the first photoresponse, and filters of the second, third, and fourth photoresponses distributed among the checkerboard pattern such that the filters of the second, third, and fourth photoresponses are sequentially symmetric about one or both of a pair of orthogonal axes of the minimal repeating unit.
-
公开(公告)号：US20140340553A1
公开(公告)日：2014-11-20
申请号：US14243480
申请日：2014-04-02
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Jiangtao Kuang , Donghui Wu , Chao Wang , Eiichi Funatsu
IPC: H04N5/355
CPC classification number: H04N5/35554 , H04N5/2355 , H04N5/35545 , H04N5/35563
Abstract: A method of reading pixel data from a pixel array includes exposing each one of a plurality of regions of pixels a respective exposure time. Pixel data is read from the plurality of regions of pixels. The pixel data is interpolated from a first one of the plurality of regions of pixels to determine the pixel data of the regions of pixels other than the first one of the plurality of regions of pixels to generate a first image having the first exposure time. The pixel data is interpolated from the second one of the plurality of regions of pixels to determine the pixel data of the regions of pixels other than the second one of the plurality of regions to generate a second image having the second exposure time. The images are combined to produce a high dynamic range image.
Abstract translation: 从像素阵列读取像素数据的方法包括将多个像素区域中的每一个曝光到相应的曝光时间。 从像素的多个区域读取像素数据。 从多个像素区域中的第一个像素数据插值像素数据，以确定多个像素区域中的第一像素以外的像素区域的像素数据，以产生具有第一曝光时间的第一图像。 像素数据从多个像素区域中的第二个像素内插，以确定多个区域中的第二个区域之外的像素区域的像素数据，以产生具有第二曝光时间的第二图像。 图像被组合以产生高动态范围图像。
-
-
-
-
-
-
-
-
Search Results
29
records
(took 0.026 seconds)
