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公开(公告)号：US09477138B2
公开(公告)日：2016-10-25
申请号：US13914051
申请日：2013-06-10
Applicant: Apple Inc.
Inventor： Ralph Brunner , Michael Chin
CPC classification number: G03B13/36 , H04N5/23212 , H04N5/23216
Abstract: Systems, methods, and computer readable media to provide improved autofocus operations are described. In general, techniques are disclosed that show how to improve contrast-based autofocus operations by applying a novel threshold-and-select action to window-specific focus scores. More particularly, techniques disclosed herein may evaluate a multi-window autofocus area over a burst collected group of images. For each captured image, focus scores for each window within an autofocus area may be collected, aggregated and then consolidated to identify a single focus metric and its associated lens position for each window. The window-specific focus scores may be reviewed and selection of a “best” autofocus lens position made using a selection criteria. The specified criteria may be used to bias the selection to either a front-of-plane (macro) or back-of-plane (infinity) focus position.
Abstract translation: 描述了提供改进的自动对焦操作的系统，方法和计算机可读介质。 通常，公开了显示如何通过对窗口特定聚焦分数应用新的阈值选择动作来改进基于对比度的自动对焦操作的技术。 更具体地，本文公开的技术可以在突发收集的图像组上评估多窗口自动对焦区域。 对于每个捕获的图像，可以收集，聚合自动聚焦区域内的每个窗口的焦点分数，然后合并以识别每个窗口的单个焦点度量及其相关联的透镜位置。 可以审查特定于窗口的焦点分数，并且使用选择标准来选择“最佳”自动对焦镜头位置。 指定的标准可以用于将选择偏置到平面前（宏）或平面（无穷远）焦点位置。
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公开(公告)号：US20150070537A1
公开(公告)日：2015-03-12
申请号：US14269941
申请日：2014-05-05
Applicant: Apple Inc.
Inventor： Yingjun Bai , Michael Chin , Touraj Tajbakhsh
CPC classification number: H04N9/735 , H04N1/60 , H04N1/6086 , H04N5/2353 , H04N5/3572
Abstract: This disclosure pertains to systems, methods, and computer readable media for performing lens shading correction (LSC) operations that modulate gains based on scene lux level and lens focus distance. These gains compensate for both color lens shading (i.e., the deviation between R, G, and B channels) and vignetting (i.e., the drop off in pixel intensity around the edges of an image). As scene illuminance increases, the sensor captures more signal from the actual scene, and the lens shading effects begin to appear. To deal with the situation, the lens shading gains are configured to adaptively ‘scale down’ when scene lux approaches zero and ‘scale up’ when scene lux changes from near zero to become larger. The lens shading gain may also be modulated based on the focus distance. For optical systems without zoom, the inventors have discovered that the amount of lens shading fall off changes as focus distance changes.
Abstract translation: 本公开涉及用于执行基于场景勒克斯水平和透镜焦距的调制增益的透镜阴影校正（LSC）操作的系统，方法和计算机可读介质。 这些增益补偿了彩色透镜阴影（即，R，G和B通道之间的偏差）和渐晕（即，围绕图像边缘的像素强度的下降）。 随着场景照度的增加，传感器捕获来自实际场景的更多信号，并开始出现镜头遮光效果。 为了处理这种情况，当场景勒克斯接近零时，镜头遮蔽增益被配置为自适应地“缩小”，当场景勒克斯从近零变化到更大时，“镜像”增大。 透镜遮光增益也可以基于焦距进行调制。 对于没有变焦的光学系统，本发明人已经发现，随着焦距的变化，透镜遮蔽量的下降变化。
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公开(公告)号：US20140362275A1
公开(公告)日：2014-12-11
申请号：US13914051
申请日：2013-06-10
Applicant: Apple Inc.
Inventor： Ralph Brunner , Michael Chin
IPC: G03B13/36
CPC classification number: G03B13/36 , H04N5/23212 , H04N5/23216
Abstract: Systems, methods, and computer readable media to provide improved autofocus operations are described. In general, techniques are disclosed that show how to improve contrast-based autofocus operations by applying a novel threshold-and-select action to window-specific focus scores. More particularly, techniques disclosed herein may evaluate a multi-window autofocus area over a burst collected group of images. For each captured image, focus scores for each window within an autofocus area may be collected, aggregated and then consolidated to identify a single focus metric and its associated lens position for each window. The window-specific focus scores may be reviewed and selection of a “best” autofocus lens position made using a selection criteria. The specified criteria may be used to bias the selection to either a front-of-plane (macro) or back-of-plane (infinity) focus position.
Abstract translation: 描述了提供改进的自动对焦操作的系统，方法和计算机可读介质。 通常，公开了显示如何通过对窗口特定聚焦分数应用新颖的阈值选择动作来改进基于对比度的自动对焦操作的技术。 更具体地，本文公开的技术可以在突发收集的图像组上评估多窗口自动对焦区域。 对于每个捕获的图像，可以收集，聚合自动聚焦区域内的每个窗口的聚焦分数，然后合并以识别每个窗口的单个焦点度量及其相关联的透镜位置。 可以审查特定于窗口的焦点分数，并且使用选择标准来选择“最佳”自动对焦镜头位置。 指定的标准可以用于将选择偏置到平面前（宏）或平面（无穷远）焦点位置。
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Patent Agency Ranking
公开(公告)号：US10171786B2
公开(公告)日：2019-01-01
申请号：US15626629
申请日：2017-06-19
Applicant: Apple Inc.
Inventor： Yingjun Bai , Michael Chin , Touraj Tajbakhsh
Abstract: This disclosure pertains to systems, methods, and computer readable media for performing lens shading correction (LSC) operations that modulate gains based on scene lux level and lens focus distance. These gains compensate for both color lens shading (i.e., the deviation between R, G, and B channels) and vignetting (i.e., the drop off in pixel intensity around the edges of an image). As scene illuminance increases, the sensor captures more signal from the actual scene, and the lens shading effects begin to appear. To deal with the situation, the lens shading gains are configured to adaptively ‘scale down’ when scene lux approaches zero and ‘scale up’ when scene lux changes from near zero to become larger. The lens shading gain may also be modulated based on the focus distance. For optical systems without zoom, the inventors have discovered that the amount of lens shading fall off changes as focus distance changes.
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公开(公告)号：US09451155B2
公开(公告)日：2016-09-20
申请号：US14447427
申请日：2014-07-30
Applicant: Apple Inc.
Inventor： Ralph Brunner , Michael Chin
CPC classification number: H04N5/23212 , G02B7/38 , G03B13/36 , H04N5/23222
Abstract: An apparatus, method, and computer readable medium related to autofocusing a camera lens system. An initial image is captured at a first lens position and focus information is extracted with respect to a first plurality of focus windows. A second image is captured at a second lens position and focus information is extracted for a second plurality of focus windows that correspond to the first plurality of focus windows in the initial image. The focus information for corresponding windows is compared to determine whether the focus status in each window is improving or degrading; this determination reveals whether the lens is positioned in a desirable position with respect to the data revealed by the data extracted from the focus windows.
Abstract translation: 与自动对焦相机镜头系统相关的装置，方法和计算机可读介质。 在第一透镜位置处捕获初始图像，并且相对于第一多个焦点窗口提取焦点信息。 在第二透镜位置处捕获第二图像，并且针对对应于初始图像中的第一多个聚焦窗口的第二多个焦点窗口提取焦点信息。 比较相应窗口的焦点信息，以确定每个窗口中的焦点状态是改善还是降级; 该确定揭示了透镜是否位于相对于从焦点窗口提取的数据所揭示的数据的期望位置。
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公开(公告)号：US20160037052A1
公开(公告)日：2016-02-04
申请号：US14447427
申请日：2014-07-30
Applicant: Apple Inc.
Inventor： Ralph Brunner , Michael Chin
CPC classification number: H04N5/23212 , G02B7/38 , G03B13/36 , H04N5/23222
Abstract: An apparatus, method, and computer readable medium related to autofocusing a camera lens system. An initial image is captured at a first lens position and focus information is extracted with respect to a first plurality of focus windows. A second image is captured at a second lens position and focus information is extracted for a second plurality of focus windows that correspond to the first plurality of focus windows in the initial image. The focus information for corresponding windows is compared to determine whether the focus status in each window is improving or degrading; this determination reveals whether the lens is positioned in a desirable position with respect to the data revealed by the data extracted from the focus windows.
Abstract translation: 与自动对焦相机镜头系统相关的装置，方法和计算机可读介质。 在第一透镜位置处捕获初始图像，并且相对于第一多个焦点窗口提取焦点信息。 在第二透镜位置处捕获第二图像，并且针对对应于初始图像中的第一多个聚焦窗口的第二多个焦点窗口提取焦点信息。 比较相应窗口的焦点信息，以确定每个窗口中的焦点状态是改善还是降级; 该确定揭示了透镜是否位于相对于从焦点窗口提取的数据所揭示的数据的期望位置。
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公开(公告)号：US20170289512A1
公开(公告)日：2017-10-05
申请号：US15626629
申请日：2017-06-19
Applicant: Apple Inc.
Inventor： Yingjun Bai , Michael Chin , Touraj Tajbakhsh
CPC classification number: H04N9/735 , H04N1/60 , H04N1/6086 , H04N5/2353 , H04N5/3572
Abstract: This disclosure pertains to systems, methods, and computer readable media for performing lens shading correction (LSC) operations that modulate gains based on scene lux level and lens focus distance. These gains compensate for both color lens shading (i.e., the deviation between R, G, and B channels) and vignetting (i.e., the drop off in pixel intensity around the edges of an image). As scene illuminance increases, the sensor captures more signal from the actual scene, and the lens shading effects begin to appear. To deal with the situation, the lens shading gains are configured to adaptively ‘scale down’ when scene lux approaches zero and ‘scale up’ when scene lux changes from near zero to become larger. The lens shading gain may also be modulated based on the focus distance. For optical systems without zoom, the inventors have discovered that the amount of lens shading fall off changes as focus distance changes.
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公开(公告)号：US09699428B2
公开(公告)日：2017-07-04
申请号：US14269941
申请日：2014-05-05
Applicant: Apple Inc.
Inventor： Yingjun Bai , Michael Chin , Touraj Tajbakhsh
CPC classification number: H04N9/735 , H04N1/60 , H04N1/6086 , H04N5/2353 , H04N5/3572
Abstract: This disclosure pertains to systems, methods, and computer readable media for performing lens shading correction (LSC) operations that modulate gains based on scene lux level and lens focus distance. These gains compensate for both color lens shading (i.e., the deviation between R, G, and B channels) and vignetting (i.e., the drop off in pixel intensity around the edges of an image). As scene illuminance increases, the sensor captures more signal from the actual scene, and the lens shading effects begin to appear. To deal with the situation, the lens shading gains are configured to adaptively ‘scale down’ when scene lux approaches zero and ‘scale up’ when scene lux changes from near zero to become larger. The lens shading gain may also be modulated based on the focus distance. For optical systems without zoom, the inventors have discovered that the amount of lens shading fall off changes as focus distance changes.
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