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公开(公告)号：US10855964B2
公开(公告)日：2020-12-01
申请号：US16116838
申请日：2018-08-29
Applicant: Apple Inc.
Inventor： Frederic Cao , Touraj Tajbakhsh , Muge Wang
Abstract: Embodiments relate to generation of hue maps for highlight recovery of an input image. An image having a plurality of color channels is obtained at a first resolution lower than a resolution of the input image. A hue for each color channel for each pixel is determined, using a pixel value for that color channel and pixel values for the plurality of color channels in the first image. Weights are determined for each pixel for each color channel, based on hues for the pixel and pixel values for the pixel in the first image. A plurality of candidate hue maps are generated, based on the weights and pixel values in the first image in a patch surrounding the pixel for the plurality of color channels.
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公开(公告)号：US12132996B2
公开(公告)日：2024-10-29
申请号：US17934494
申请日：2022-09-22
Applicant: Apple Inc.
Inventor： Bosheng Zhang , Angelo M Alaimo , Kathrin Berkner Cieslicki , Paul M Hubel , Frederic Cao , Bryan Dang
Abstract: A light source module includes an array of illumination elements and an optional projecting lens. The light source module is configured to receive or generate a control signal for adjusting different ones of the illumination elements to control a light field emitted from the light source module. In some embodiments, the light source module is also configured to adjust the projecting lens responsive to objects in an illuminated scene and a field of view of an imaging device. A controller for a light source module may determine a light field pattern based on various parameters including a field of view of an imaging device, an illumination sensitivity model of the imaging device, depth, ambient illumination and reflectivity of objects, configured illumination priorities including ambient preservation, background illumination and direct/indirect lighting balance, and so forth.
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公开(公告)号：US20200077066A1
公开(公告)日：2020-03-05
申请号：US16116838
申请日：2018-08-29
Applicant: Apple Inc.
Inventor： Frederic Cao , Touraj Tajbakhsh , Muge Wang
Abstract: Embodiments relate to generation of hue maps for highlight recovery of an input image. An image having a plurality of color channels is obtained at a first resolution lower than a resolution of the input image. A hue for each color channel for each pixel is determined, using a pixel value for that color channel and pixel values for the plurality of color channels in the first image. Weights are determined for each pixel for each color channel, based on hues for the pixel and pixel values for the pixel in the first image. A plurality of candidate hue maps are generated, based on the weights and pixel values in the first image in a patch surrounding the pixel for the plurality of color channels.
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公开(公告)号：US10467803B1
公开(公告)日：2019-11-05
申请号：US16128295
申请日：2018-09-11
Applicant: Apple Inc.
Inventor： Yury Degtyarev , Frederic Cao , Garrett M. Johnson
IPC: G06T15/50 , G06T15/04 , G06T17/20 , G06T5/00 , G06F3/0482
Abstract: Embodiments of the present disclosure can provide systems, methods, and computer-readable medium for providing virtual lighting adjustments to image data. A number of source images may be generated to individually depict solid colors of a color space (e.g., RGB color space). Virtual lighting adjustments associated with a virtual lighting mode may be applied to each source image to generate a corresponding target image. The source images and the target images may be utilized to train a model to identify pixel modifications to be applied to image data. The modifications may be associated with a virtual lighting mode. Subsequently, a user may obtain image data (e.g., an image or video) select a virtual lighting mode via an image data processing application. The previously trained model may be utilized to modify the image to apply the virtual lighting effects associated with the selected virtual lighting mode.
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公开(公告)号：US10070109B2
公开(公告)日：2018-09-04
申请号：US15198354
申请日：2016-06-30
Applicant: Apple Inc.
Inventor： Suk Hwan Lim , Frederic Cao , Touraj Tajbakhsh
Abstract: Embodiments of the present disclosure relate to highlight recovery of a high-resolution image using a single low-resolution image captured at a lower exposure. An example apparatus includes a hue target circuit that receives an input image at a high-resolution including at least one pixel with a clipped color channel. For example, the input image is a Blue sky image with a pixel having clipped Blue channel. The hue target circuit also receives a set of candidate hue maps having a pixel resolution lower than the high-resolution of the input image. The hue target circuit generates a target hue value for the at least one pixel using the pixel information of the set of candidate hue maps. The apparatus also includes a hue recovery circuit that generates a recovered version of the input image by adjusting hue information of the clipped color channel based on the generated target hue.
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Patent Agency Ranking
公开(公告)号：US20180007332A1
公开(公告)日：2018-01-04
申请号：US15198354
申请日：2016-06-30
Applicant: Apple Inc.
Inventor： Suk Hwan Lim , Frederic Cao , Touraj Tajbakhsh
CPC classification number: H04N9/643 , G06T5/008 , G06T2207/10024 , H04N5/2355 , H04N9/045 , H04N9/68
Abstract: Embodiments of the present disclosure relate to highlight recovery of a high-resolution image using a single low-resolution image captured at a lower exposure. An example apparatus includes a hue target circuit that receives an input image at a high-resolution including at least one pixel with a clipped color channel. For example, the input image is a Blue sky image with a pixel having clipped Blue channel. The hue target circuit also receives a set of candidate hue maps having a pixel resolution lower than the high-resolution of the input image. The hue target circuit generates a target hue value for the at least one pixel using the pixel information of the set of candidate hue maps. The apparatus also includes a hue recovery circuit that generates a recovered version of the input image by adjusting hue information of the clipped color channel based on the generated target hue.
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公开(公告)号：US11620738B2
公开(公告)日：2023-04-04
申请号：US17373362
申请日：2021-07-12
Applicant: Apple Inc.
Inventor： Touraj Tajbakhsh , Chihsin Wu , Frederic Cao
Abstract: Embodiments relate to hue preservation post processing for highlight recovery of an input image. Intensity values for multiple color channels of a plurality of color channels of a pixel of the input image is determined using corresponding ratios of target hues for the plurality of color channels of the pixel, wherein the pixel has at least one color channel with an intensity above a predetermined threshold. A hue preserved value for a color channel of the plurality of color channels of the pixel is determined using intensity values determined for the plurality of color channels of the pixel and the target hues. A recovered version of the input image is generated by adjusting hue information of the pixel, using the hue preserved value for the channel of the plurality of color channels of the pixel.
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公开(公告)号：US20230098699A1
公开(公告)日：2023-03-30
申请号：US17934494
申请日：2022-09-22
Applicant: Apple Inc.
Inventor： Bosheng Zhang , Angelo M Alaimo , Kathrin Berkner Cieslicki , Paul M Hubel , Frederic Cao , Bryan Dang
IPC: H04N5/235
Abstract: A light source module includes an array of illumination elements and an optional projecting lens. The light source module is configured to receive or generate a control signal for adjusting different ones of the illumination elements to control a light field emitted from the light source module. In some embodiments, the light source module is also configured to adjust the projecting lens responsive to objects in an illuminated scene and a field of view of an imaging device. A controller for a light source module may determine a light field pattern based on various parameters including a field of view of an imaging device, an illumination sensitivity model of the imaging device, depth, ambient illumination and reflectivity of objects, configured illumination priorities including ambient preservation, background illumination and direct/indirect lighting balance, and so forth.
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公开(公告)号：US10897558B1
公开(公告)日：2021-01-19
申请号：US16566017
申请日：2019-09-10
Applicant: Apple Inc.
Inventor： Wei Sun , Philip G. Lee , Gregory Guyomarc'h , Frederic Cao
Abstract: This disclosure relates to the lightweight and efficient synthesis of shallow depth of field (SDOF) renderings. According to some embodiments, coarse focus information and semantic segmentation information may be leveraged to generate SDOF renderings in a “live preview” or “streaming” mode. Semantic segmentation may be defined as a process of creating a mask over an image, wherein pixels are segmented into a predefined set of semantic classes. Segmentations may include as many classes as are desired by a given implementation (e.g., a ‘foreground’ class and a ‘background’ class). In some embodiments, the rendering of synthetic SDOF images according to the techniques described herein may be completed using only a single camera of a device and without the use of dedicated depth-sensing technology (e.g., structured light cameras, stereo cameras, time-of-flight cameras, etc.), thereby allowing the SDOF rendering process to operate in a fashion that is not unduly time-, processing-, and/or power-intensive.
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公开(公告)号：US10740959B2
公开(公告)日：2020-08-11
申请号：US16032418
申请日：2018-07-11
Applicant: Apple Inc.
Inventor： Garrett Johnson , Chong Chen , Frederic Cao
Abstract: Embodiments of the present disclosure can provide systems, methods, and computer-readable medium for providing virtual lighting adjustments to image data. A user interface for presenting and/or modifying image data may be provided via an electronic device. User input may be received that indicates a selection of a virtual lighting mode. Landmark points corresponding to a set of pixels of the image data may be identified based, at least in part, on depth measurement values of the set of pixels. One or more masks may be generated from the landmark points. One or more virtual lighting adjustments associated with the selected virtual lighting mode may be made to the image data using these masks (or the landmark points and an implied geometry of the landmark points). The adjusted/modified image may be presented to the user via the user interface at the electronic device.
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