公开(公告)号：US20160373644A1

公开(公告)日：2016-12-22

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

IPC: H04N5/232 ,  H04N5/378 ,  H04N5/243

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：US20150049215A1

公开(公告)日：2015-02-19

申请号：US13968092

申请日：2013-08-15

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Jiangtao Kuang ,  Donghui Wu ,  Jizhang Shan

IPC: H04N5/235 ,  G06K9/46

CPC classification number: H04N5/2355 ,  G06T5/002 ,  G06T5/40 ,  G06T2207/20208 ,  H04N5/2353 ,  H04N5/35581

Abstract: A method determines a pixel value in a high dynamic range image from two images of different brightness by obtaining corresponding input pixel intensities from the two images, determining combination weights, and calculating the pixel value in the high dynamic range image as a weighted average of the input pixel intensities. Another method determines a pixel value in a high dynamic range image from more than two images by forming pairs of corresponding input pixel intensities, determining relative combination weights for the input pixels intensities for each pair, applying a normalization condition to determine absolute combination weights, and calculating the pixel value in the high dynamic range image as a weighted average of the input pixel intensities. Systems for generating high dynamic range image generation from two or more input images include a processor, a memory, a combination weight module, and a pixel value calculation module.

Abstract translation: 一种方法通过从两个图像获得相应的输入像素强度，确定组合权重，并计算高动态范围图像中的像素值，来确定来自两个不同亮度的图像的高动态范围图像中的像素值，作为加权平均值 输入像素强度。 另一种方法通过形成相应的输入像素强度对来确定来自两个以上图像的高动态范围图像中的像素值，确定每对输入像素强度的相对组合权重，应用归一化条件来确定绝对组合权重，以及 计算高动态范围图像中的像素值作为输入像素强度的加权平均值。 用于从两个或多个输入图像生成高动态范围图像生成的系统包括处理器，存储器，组合权重模块和像素值计算模块。

公开(公告)号：US10223775B2

公开(公告)日：2019-03-05

申请号：US15265731

申请日：2016-09-14

Applicant: OmniVision Technologies, Inc.

Inventor： Sarvesh Swami ,  Donghui Wu

IPC: G06K9/00 ,  G06T5/00 ,  G06T5/50 ,  H04N5/247 ,  H04N5/265 ,  G06T5/20

Abstract: A method for combining array camera images with feature-based ghost removal includes (a) receiving, from an array camera, a first image and a second image respectively captured by a first camera and a second camera of the array camera, (b) rectifying and aligning the first image and the second image, (c) after said rectifying and aligning, identifying features in the first image to produce at least one first feature image each indicating features in the first image, and identifying features in the second image to produce at least one second feature image each indicating features in the second image, (d) comparing the at least one first feature image with the at least one second feature image to determine a ghost mask defining combination weights for combination of the first image with the second image.

公开(公告)号：US10102434B2

公开(公告)日：2018-10-16

申请号：US14978873

申请日：2015-12-22

Applicant: OmniVision Technologies, Inc.

Inventor： Lei Yang ,  Donghui Wu

IPC: G06K9/00 ,  G06T7/00

Abstract: A lane detection system includes a non-volatile memory storing machine-readable instructions and an image processor capable of receiving a road image. The image processor, when executing the machine-readable instructions, is capable of: (i) processing the road image to identify a lane candidate within a lane-existing region of the road image, the lane-existing region having (a) a near subregion including an imaged road region nearer to the vehicle and (b) a far subregion including an imaged road region farther from the vehicle, (ii) verifying the lane candidate as a true lane candidate when a minimum distance between (a) a line fit to a portion of the lane candidate in the near subregion and (b) a predetermined reference point in the road image is less than a neighborhood distance; and (iii) extending the true lane candidate into the far subregion to form a detected lane marker demarcating the lane marker.

公开(公告)号：US20180075586A1

公开(公告)日：2018-03-15

申请号：US15261819

申请日：2016-09-09

Applicant: OmniVision Technologies, Inc.

Inventor： Sarvesh Swami ,  Donghui Wu ,  Timofey Uvarov

IPC: G06T5/00 ,  G06T7/11 ,  G06T7/136 ,  G06T5/50

CPC classification number: G06T5/004 ,  G06T5/50 ,  G06T7/11 ,  G06T7/136 ,  G06T7/194 ,  G06T2207/20021 ,  G06T2207/20208 ,  G06T2207/20221 ,  H04N5/232

Abstract: A method for removing a ghost artifact from a multiple-exposure image of a scene method includes steps of generating and segmenting a difference mask, determining a lower threshold and an upper threshold, generating a refined mask, and generating a corrected image. The difference mask includes a plurality of absolute differences in luminance-values between the multiple-exposure image and a first image of the scene. The segmenting step involves segmenting the difference mask into a plurality of blocks. The lower and upper thresholds are based on statistical properties of the blocks. The method generates the refined mask by mapping each absolute difference to a respective one of a plurality refined values, of the refined mask, equal to a function of the absolute difference, the lower threshold, and the upper threshold. The corrected image is a weighted sum of the first image and the multiple-exposure image, weights being based on the refined mask.

公开(公告)号：US09800796B1

公开(公告)日：2017-10-24

申请号：US15174819

申请日：2016-06-06

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Wenchao Zhang ,  Timofey Uvarov ,  Sarvesh Swami ,  Willie Teck Tian Png ,  Donghui Wu

IPC: H04N5/235 ,  H04N5/225 ,  H04N5/378 ,  G06T7/00 ,  G06K9/46 ,  G06T7/60 ,  G06K9/52

CPC classification number: H04N5/2355 ,  G06K9/4604 ,  G06K9/4661 ,  G06K9/52 ,  G06T5/009 ,  G06T5/50 ,  G06T7/0085 ,  G06T7/60 ,  G06T2200/21 ,  G06T2207/10016 ,  G06T2207/20208 ,  G06T2207/20221 ,  H04N5/2253 ,  H04N5/378

Abstract: An imaging system includes an image sensor to capture a sequence of images, including a low dynamic range (LDR) image and a high dynamic range (HDR) image, and a processor coupled to the image sensor to receive the LDR image and the HDR image. The processor receives instructions to perform operations to segment the LDR image and HDR image into a plurality of segments. The processor also scans the plurality of LDR and HDR image segments to find a first image segment in the plurality of LDR image segments and a second image segment in the plurality of HDR image segments. The processor then finds interest points in the first and second image segments, and determines an alignment parameter based on matched interest points. The LDR image and the HDR image are combined in accordance with the alignment parameter.

公开(公告)号：US20170264839A1

公开(公告)日：2017-09-14

申请号：US15064546

申请日：2016-03-08

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Timofey Uvarov ,  Sarvesh Swami ,  Donghui Wu

IPC: H04N5/355 ,  G06T5/00 ,  H04N5/378 ,  H04N5/265

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：US09667933B2

公开(公告)日：2017-05-30

申请号：US14642220

申请日：2015-03-09

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Donghui Wu ,  Ping-Hsu Chen

IPC: H04N9/07 ,  H04N9/083 ,  H04N3/14 ,  H04N5/335 ,  H04N9/64 ,  H04N9/73 ,  H01L27/146 ,  H04N9/04 ,  H04N5/33

CPC classification number: H04N9/647 ,  H01L27/14609 ,  H01L27/14621 ,  H01L27/14623 ,  H04N5/332 ,  H04N9/045 ,  H04N9/07 ,  H04N9/735

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：US09467665B1

公开(公告)日：2016-10-11

申请号：US14753643

申请日：2015-06-29

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Jing Wang ,  Donghui Wu ,  Jizhang Shan

IPC: H04N9/04 ,  H04N5/378 ,  G02B5/20

CPC classification number: H04N9/045 ,  G02B5/201 ,  H04N5/378

Abstract: Embodiments are disclosed of a color filter array including a plurality of tiled minimal repeating units. Each minimal repeating unit comprises a set of individual filters grouped into an array of M rows by N columns, wherein each set of individual filters includes a plurality of individual filters having at least first, second, third, and fourth spectral photoresponses. If M equals N, at least two directions within each minimal repeating unit include individual filters having all the spectral photoresponses, the at least two directions being selected from a set of directions consisting of row, column, major diagonal and minor diagonal. And if M≠N at least two directions within each of one or more N×N or M×M cells within the minimal repeating unit include individual filters having all the spectral photoresponses, the at least two directions being selected from a set of directions consisting of row, column, major diagonal and minor diagonal of each cell.

Abstract translation: 公开了包括多个平铺最小重复单元的滤色器阵列的实施例。 每个最小重复单元包括分组为M行×N列的阵列的一组单独滤波器，其中每组单独滤波器包括具有至少第一，第二，第三和第四光谱光响应的多个单独滤波器。 如果M等于N，则每个最小重复单元内的至少两个方向包括具有所有光谱响应的单独滤光器，至少两个方向从由行，列，主对角线和次对角线组成的一组方向中选择。 并且如果M≠N，则最小重复单元内的一个或多个N×N或M×M个单元内的至少两个方向中的至少两个方向包括具有所有光谱响应的单个滤波器，所述至少两个方向选自一组方向 每个单元格的行，列，主对角线和次对角线。

公开(公告)号：US20150181187A1

公开(公告)日：2015-06-25

申请号：US14642220

申请日：2015-03-09

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Donghui Wu ,  Ping-Hsu Chen

IPC: H04N9/64 ,  H04N9/73

CPC classification number: H04N9/647 ,  H01L27/14609 ,  H01L27/14621 ,  H01L27/14623 ,  H04N5/332 ,  H04N9/045 ,  H04N9/07 ,  H04N9/735

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.

Abstract translation: 滤色器阵列的实施例包括多个平铺最小重复单元，每个最小重复单元包括M×N个单独滤波器组，并且该组中的每个单独滤波器具有选自四个不同光响应中的光响应。 每个最小重复单元包括第一光响应的滤光片的棋盘图案，以及分布在棋盘图案之间的第二，第三和第四光响应的滤光片，使得第二，第三和第四光响应的滤光器依次对称关于一个或 两个最小重复单元的一对正交轴。