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公开(公告)号：US09307212B2
公开(公告)日：2016-04-05
申请号：US14810297
申请日：2015-07-27
申请人： FotoNation Limited
发明人： Ruxandra Vranceanu
CPC分类号： H04N9/646 , G06T5/003 , G06T5/009 , G06T5/40 , G06T5/50 , G06T2207/10016 , G06T2207/10024 , G06T2207/10144 , G06T2207/20008 , H04N5/235 , H04N5/2355 , H04N9/045 , H04N9/68
摘要： A technique is provided for generating sharp, well-exposed, color images front low-light images. A series of under-exposed images is acquired. A mean image is computed and a sum image is generated each based on the series of under-exposed images. Chrominance variables of pixels of the mean image are mapped to chrominance variables of pixels of the sum image. Chrominance values of pixels within the series of under-exposed images are replaced with chrominance values of the sum image. A set of sharp, well-exposed, color images is generated based on the series of under-exposed images with replaced chrominance values.
摘要翻译： 提供了一种技术，用于产生锋利，曝光良好的彩色图像，前面的低光图像。 获得一系列曝光不足的图像。 计算平均图像，并且基于一系列曝光不足的图像来生成和图像。 平均图像的像素的色度变量被映射到和图像的像素的色度变量。 未曝光图像系列中的像素的色度值被和图像的色度值代替。 基于具有替换的色度值的一系列曝光不足的图像产生一组锐利，良好曝光的彩色图像。
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公开(公告)号：US10769435B2
公开(公告)日：2020-09-08
申请号：US16656303
申请日：2019-10-17
申请人： FotoNation Limited
IPC分类号： G06K9/00
摘要： A method of image processing within an image acquisition device. In one embodiment an image including one or more face regions is acquired and one or more iris regions are identified within the one or more face regions. The one or more iris regions are analyzed to identify any iris region containing an iris pattern that poses a risk of biometrically identifying a subject within the image. Responsive to identifying any such iris region, a respective substitute iris region, containing an iris pattern distinct from the identified iris pattern to avoid identifying the subject within the image, is determined and the identified iris region is replaced with the substitute iris region in the original image.
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公开(公告)号：US10051197B2
公开(公告)日：2018-08-14
申请号：US15099057
申请日：2016-04-14
申请人： FotoNation Limited
摘要： An image acquisition method operates in a hand held image acquisition device with a camera. A first image of a scene is obtained with the camera at a nominal exposure level. A number of relatively bright pixels and a number of relatively dark pixels within the first image are determined. Based on the number of relatively bright pixels, a negative exposure adjustment is determined and based on the number of relatively dark pixels, a positive exposure adjustment is determined. Respective images are acquired at the nominal exposure level; with the negative exposure adjustment; and with the positive exposure adjustment as component images for high dynamic range (HDR) image of the scene.
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公开(公告)号：US20150334283A1
公开(公告)日：2015-11-19
申请号：US14810297
申请日：2015-07-27
申请人： FotoNation Limited
发明人： Ruxandra Vranceanu
CPC分类号： H04N9/646 , G06T5/003 , G06T5/009 , G06T5/40 , G06T5/50 , G06T2207/10016 , G06T2207/10024 , G06T2207/10144 , G06T2207/20008 , H04N5/235 , H04N5/2355 , H04N9/045 , H04N9/68
摘要： A technique is provided for generating sharp, well-exposed, color images front low-light images. A series of under-exposed images is acquired. A mean image is computed and a sum image is generated each based on the series of under-exposed images. Chrominance variables of pixels of the mean image are mapped to chrominance variables of pixels of the sum image. Chrominance values of pixels within the series of under-exposed images are replaced with chrominance values of the sum image. A set of sharp, well-exposed, color images is generated based on the series of under-exposed images with replaced chrominance values.
摘要翻译： 提供了一种技术，用于产生锋利，曝光良好的彩色图像，前面的低光图像。 获得一系列曝光不足的图像。 计算平均图像，并且基于一系列曝光不足的图像来生成和图像。 平均图像的像素的色度变量被映射到和图像的像素的色度变量。 未曝光图像系列中的像素的色度值被和图像的色度值代替。 基于具有替换的色度值的一系列曝光不足的图像产生一组锐利，良好曝光的彩色图像。
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公开(公告)号：US11302009B2
公开(公告)日：2022-04-12
申请号：US16544238
申请日：2019-08-19
申请人： FotoNation Limited
摘要： A method of generating landmark locations for an image crop comprises: processing the crop through an encoder-decoder to provide a plurality of N output maps of comparable spatial resolution to the crop, each output map corresponding to a respective landmark of an object appearing in the image crop; processing an output map from the encoder through a plurality of feed forward layers to provide a feature vector comprising N elements, each element including an (x,y) location for a respective landmark. Any landmarks locations from the feature vector having an x or a y location outside a range for a respective row or column of the crop are selected for a final set of landmark locations; with remaining landmark locations tending to be selected from the N (x,y) landmark locations from the plurality of N output maps.
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公开(公告)号：US10999526B2
公开(公告)日：2021-05-04
申请号：US16708251
申请日：2019-12-09
申请人： FotoNation Limited
摘要： A system includes an image sensor, an adjustable aperture, and a memory. THE memory includes computer executable instructions that, when executed by a processor, cause the system to perform operations including obtaining a first image via the image sensor based at least in part on a first aperture stop of the adjustable aperture, identifying a first pixel of the first image, identifying a second pixel of the first image, determining a second aperture stop of the adjustable aperture based at least in part on the first pixel, determining a third aperture stop of the adjustable aperture based at least in part on the second pixel, obtaining a second image via the image sensor based at least in part on the second aperture stop, and obtaining a third image via the image sensor based at least in part on the third aperture stop.
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公开(公告)号：US10511786B2
公开(公告)日：2019-12-17
申请号：US16102510
申请日：2018-08-13
申请人： FotoNation Limited
摘要： An image acquisition method operates in a hand held image acquisition device with a camera. A first image of a scene is obtained with the camera at a nominal exposure level. A number of relatively bright pixels and a number of relatively dark pixels within the first image are determined. Based on the number of relatively bright pixels, a negative exposure adjustment is determined and based on the number of relatively dark pixels, a positive exposure adjustment is determined. Respective images are acquired at the nominal exposure level; with the negative exposure adjustment; and with the positive exposure adjustment as component images for high dynamic range (HDR) image of the scene.
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公开(公告)号：US10452910B2
公开(公告)日：2019-10-22
申请号：US15301937
申请日：2015-03-27
申请人： FotoNation Limited
摘要： A method of image processing within an image acquisition device. In one embodiment an image including one or more face regions is acquired and one or more iris regions are identified within the one or more face regions. The one or more iris regions are analyzed to identify any iris region containing an iris pattern that poses a risk of biometrically identifying a subject within the image. Responsive to identifying any such iris region, a respective substitute iris region, containing an iris pattern distinct from the identified iris pattern to avoid identifying the subject within the image, is determined and the identified iris region is replaced with the substitute iris region in the original image.
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公开(公告)号：US09674427B2
公开(公告)日：2017-06-06
申请号：US15092001
申请日：2016-04-06
申请人： FotoNation Limited
发明人： Ruxandra Vranceanu
CPC分类号： H04N5/23219 , G06K9/00234 , G06K9/036 , G06K9/22 , G06T5/009 , G06T5/50 , G06T7/0002 , G06T2207/20208 , G06T2207/20216 , G06T2207/30168 , G06T2207/30201 , G06T2210/22 , H04N9/646
摘要： An image processing method operable in a hand held image acquisition device comprising at least one camera comprises obtaining an image with the camera and identifying at least one face region detected within the image. A mean intensity of intensity values for pixels of at least one identified face region is determined. Responsive to the mean intensity for a face region being less than a threshold amount, at least some of the pixels of the image are lightened. A contrast of pixels of the image is enhanced as a function of pixel intensity distribution within the image and a contrast of pixels of the face region is enhanced as a function of pixel intensity distribution within the face region. The contrast enhanced pixels of the face region are blended with pixels of the image which have been lightened and/or whose contrast has been enhanced to provide a processed image.
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