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公开(公告)号：US20170134625A1
公开(公告)日：2017-05-11
申请号：US14936405
申请日：2015-11-09
Applicant: QUALCOMM Incorporated
Inventor： Nathaniel Salazar , Sandeep Dhar , Todd Sutton
CPC classification number: H04N5/2256 , G03B15/05 , G03B17/18 , G03B2215/0503 , G03B2215/0567 , G06T7/90 , H04N5/2257 , H04N5/23293 , H04N5/2351 , H04N5/2354 , H04N9/045 , H04N9/735
Abstract: Systems and methods for illuminating a subject for image capture are described herein. A processor may determine an ambient color temperature of a subject. The processor may further determine a color temperature for outputting light from a display facing a first direction based on a light output characteristic for a dedicated illumination element facing the first direction, the determined ambient color temperature, and a desired color temperature of the subject. The processor may further illuminate the subject using both the dedicated illumination element and the display. The display may output light based on the determined color temperature for outputting light from the display. The processor may further capture, using an image sensor facing the first direction, an image of the subject during the subject being illuminated using both the dedicated illumination element and the display.
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公开(公告)号：US09420248B2
公开(公告)日：2016-08-16
申请号：US14491627
申请日：2014-09-19
Applicant: QUALCOMM Incorporated
Inventor： Ruben Manuel Velarde , Nathaniel Jay Tobias Salazar , Szepo Robert Hung , Sandeep Dhar , Hengzhou Ding
CPC classification number: H04N9/735 , G03B15/03 , G03B15/05 , G03B2215/0503 , G03B2215/0567 , G03B2215/0571 , H04N5/2354 , H04N9/045
Abstract: Certain aspects relate to systems and techniques for color temperature analysis and matching. For example, three or more camera flash LEDs of different output colors can be used to match any of a range of ambient color temperatures in a non-linear space on the black body curve. The scene color temperature can be analyzed in a preliminary image by determining actual sensor R/G and B/G ratios, enabling more accurate matching of foreground flash lighting to background lighting by the reference illuminant for subsequent white balance processing. The current provided to, and therefore brightness emitted from, each LED can be individually controlled based on the determined sensor response to provide a dynamic and adaptive mix of the output colors of the LEDs.
Abstract translation: 某些方面涉及色温分析和匹配的系统和技术。 例如，可以使用不同输出颜色的三个或更多个相机闪光LED来匹配黑体曲线上的非线性空间中的环境色温范围中的任何一个。 可以通过确定实际的传感器R / G和B / G比率，在初步图像中分析场景色温，从而能够通过参考光源更准确地将前景闪光照明与背景照明的匹配进行后续的白平衡处理。 可以基于所确定的传感器响应来单独地控制提供给每个LED并且因此从每个LED发射的亮度的电流，以提供LED的输出颜色的动态和自适应混合。
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公开(公告)号：US20170133966A1
公开(公告)日：2017-05-11
申请号：US14936374
申请日：2015-11-09
Applicant: QUALCOMM Incorporated
Inventor： Qadeer Khan , Sandeep Dhar
IPC: H02P25/032 , G01R19/165
CPC classification number: G01R19/16547 , H02P25/034
Abstract: The embodiments described herein relate to an improved system and algorithm for searching for a resonant frequency of a resonant actuator where the error between the drive frequency of the LRA and the resonant frequency of the LRA is large. In one embodiment, the drive frequency of a resonant actuator is set to an initial drive frequency, which is applied to the LRA. An induced voltage on the resonant actuator crosses can then be detected crossing a threshold voltage after the drive signal is turned off. If crossing the threshold voltage is not detected, the system is configured to sweep through a plurality of drive frequencies until the induced voltage on the resonant actuator is detected crossing the threshold voltage. This can be accomplished by repeatedly adjusting the drive frequency by a predefined incremental frequency ΔF and determining when the induced voltage on the LRA crosses the threshold voltage.
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公开(公告)号：US20160088278A1
公开(公告)日：2016-03-24
申请号：US14491627
申请日：2014-09-19
Applicant: QUALCOMM INCORPORATED
Inventor： Ruben Manuel Velarde , Nathaniel Jay Tobias Salazar , Szepo Robert Hung , Sandeep Dhar , Hengzhou Ding
CPC classification number: H04N9/735 , G03B15/03 , G03B15/05 , G03B2215/0503 , G03B2215/0567 , G03B2215/0571 , H04N5/2354 , H04N9/045
Abstract: Certain aspects relate to systems and techniques for color temperature analysis and matching. For example, three or more camera flash LEDs of different output colors can be used to match any of a range of ambient color temperatures in a non-linear space on the black body curve. The scene color temperature can be analyzed in a preliminary image by determining actual sensor R/G and B/G ratios, enabling more accurate matching of foreground flash lighting to background lighting by the reference illuminant for subsequent white balance processing. The current provided to, and therefore brightness emitted from, each LED can be individually controlled based on the determined sensor response to provide a dynamic and adaptive mix of the output colors of the LEDs.
Abstract translation: 某些方面涉及色温分析和匹配的系统和技术。 例如，可以使用不同输出颜色的三个或更多个相机闪光LED来匹配黑体曲线上的非线性空间中的环境色温范围中的任何一个。 可以通过确定实际的传感器R / G和B / G比率，在初步图像中分析场景色温，从而能够通过参考光源更准确地将前景闪光照明与背景照明的匹配进行后续的白平衡处理。 可以基于所确定的传感器响应来单独地控制提供给每个LED并且因此从每个LED发射的亮度的电流，以提供LED的输出颜色的动态和自适应混合。
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