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公开(公告)号：US11711613B2
公开(公告)日：2023-07-25
申请号：US17241742
申请日：2021-04-27
发明人： Shang-Chih Chuang , Ron Gaizman , Pradeep Veeramalla , Shizhong Liu , Weiliang Liu , Xiaoyun Jiang , Narayana Karthik Ravirala , Jiafu Luo , Srinath Anekere Narayan , Wei Zou
IPC分类号： H04N23/68
CPC分类号： H04N23/689 , H04N23/6812
摘要： Image frames for computational photography may be corrected, such as through rolling shutter correction (RSC), prior to fusion of the image frames to reduce wobble and jitter artifacts present in a video sequence of HDR-enhanced image frames. First and second motion data regarding motion of the image capture device may be determined for times corresponding to the capturing of the first and second image frames, respectively. The rolling shutter correction (RSC) may be applied to the first and second image frames based on both the first and second motion data. The corrected first and second image frames may then be aligned and fused to obtain a single output image frame with higher dynamic range than either of the first or second image frames.
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公开(公告)号：US20200294191A1
公开(公告)日：2020-09-17
申请号：US16298793
申请日：2019-03-11
发明人： Shang-Chih Chuang , Jing Wang , Xiaoyun Jiang
摘要： Methods, systems, and devices for processing color information are described. The method may include receiving a first set of image data collected at an image sensor based on a first color filter array having a first filter pattern, calculating a color saturation gradient based on the first set of image data, and calculating multiple color gradients based on the color saturation gradient. The multiple color gradients may each be associated with a region of the first set of image data, where each color gradient characterizes a color variation along a different direction of the region. The method may include generating a second set of image data including a color value for the region based on comparing a first direction gradient of the multiple color gradients with a second direction gradient of the multiple color gradients. Color values associated with the regions may be mapped to a second color filter array.
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公开(公告)号：US09445007B1
公开(公告)日：2016-09-13
申请号：US14631588
申请日：2015-02-25
发明人： Feng Li , Shu Fei Fan , Shilpi Sahu , Min Li , Yunqiang Chen , Xiaoyun Jiang
CPC分类号： H04N5/23296 , G06T3/40 , G06T3/4007 , G06T5/003
摘要： In some cases, conventional digital zoom techniques can lead to poor quality images. Disclosed are systems and methods for improving the quality of images generated by digital zoom. For example, in some embodiments, a parallel structure is utilized where an image is passed through a sharpener and a 2D directional upscaler at the same time. Upscaling operations are then performed on the sharpened image. The upscaled sharpened image is added to the output of the 2D directional upscaler to produce an enhanced image.
摘要翻译： 在某些情况下，常规的数字变焦技术可能导致质量差的图像。 公开了用于改善由数字变焦产生的图像质量的系统和方法。 例如，在一些实施例中，利用平行结构，其中图像同时通过磨刀器和2D定向升降器。 然后在锐化的图像上执行升序操作。 放大的锐化图像被添加到2D定向放大器的输出以产生增强的图像。
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公开(公告)号：US20200336684A1
公开(公告)日：2020-10-22
申请号：US16389221
申请日：2019-04-19
发明人： Jing Wang , Shang-Chih Chuang , Xiaoyun Jiang
摘要： Methods, systems, and devices for image processing are described. A device may capture image data based on a color filter array (CFA) associated with an image sensor. The image data may include a set of pixels. The device may determine a CFA pattern of the CFA and select a configuration appropriately. The configuration may include an indication of a first set of neighboring pixels for each pixel of the set of pixels to use to determine that a pixel is defective and a second set of neighboring pixels for each pixel of the set of pixels to use to correct the defective pixel. The device may determine that the pixel of the set of pixels is defective using the configuration, and correct the defective pixel using pixel values of the first set of neighboring pixels, or pixel values of the second set of neighboring pixels, or both.
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公开(公告)号：US20190387205A1
公开(公告)日：2019-12-19
申请号：US16010313
申请日：2018-06-15
发明人： Shang-Chih Chuang , Xiaoyun Jiang , Jun Zuo Liu
摘要： Aspects of the present disclosure relate to systems and methods for selectively processing tiles of a captured image. The captured image may be parsed into a plurality of tiles. A subset of the plurality of tiles may be selected based at least in part on at least one metric. The selected tiles may be processed according to a first technique, while each unselected tile may be selectively processed according to one or more techniques different from the first technique. The first technique and the one or more techniques may each be either an image demosaicing technique or an image denoising technique.
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公开(公告)号：US20180114296A1
公开(公告)日：2018-04-26
申请号：US15331159
申请日：2016-10-21
发明人： Shang-Chih Chuang , Xianbiao Shu , Xiaoyun Jiang , Tao Ma , Chih-Chi Cheng
CPC分类号： G06T5/002 , G06T5/004 , G06T5/10 , G06T7/13 , G06T11/60 , G06T2207/20021 , G06T2207/20192
摘要： A method performed by an electronic device is described. The method includes obtaining an input image. The input image includes image noise. The method also includes removing the image noise from the input image to produce a noise-removed image. The method further includes avoiding enhancing the image noise by performing edge detection on the noise-removed image to produce edge information. The method additionally includes producing a processed image based on the input image and the edge information.
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公开(公告)号：US20150030258A1
公开(公告)日：2015-01-29
申请号：US14222282
申请日：2014-03-21
发明人： Yunqiang Chen , Xiaoyun Jiang
IPC分类号： G06T5/00
CPC分类号： G06T5/002 , G06T2207/20012 , H04N5/217 , H04N5/357 , H04N5/3572 , H04N5/911
摘要： Systems and methods for reducing noise artifacts in an image are disclosed. A radial distance-based look up table may be used to calibrate a noise property change due to the vignette effect. Based on the look up table, a spatial varying noise reduction level is computed to correct the noise property distortion due to the image vignetting.
摘要翻译： 公开了用于减少图像中的噪声伪影的系统和方法。 基于径向距离的查询表可用于校准由于晕影效应引起的噪声特性变化。 基于查找表，计算空间变化噪声降低水平以校正由于图像渐晕引起的噪声特性失真。
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公开(公告)号：US20240357224A1
公开(公告)日：2024-10-24
申请号：US18305304
申请日：2023-04-21
CPC分类号： H04N23/632 , G06T7/97 , H04N23/57 , H04N23/65 , H04N23/69 , H04N25/46 , H04N25/47 , G06T2207/10144 , G06T2207/20104 , G06T2207/20221
摘要： Systems and methods for image fusing are described. In examples, a first image of a scene may be obtained associated with a first parameter and a second image of the scene may be obtained associated with a second parameter. The first image and the second image may be fused to obtain at least one first fused image. A third image of the scene may be obtained associated with a third parameter and a fourth image of the scene may be obtained associated with a fourth image. At least one parameter associated with the third image and the fourth image used to obtain the images may be adjusted, wherein the adjustment may be based at least in part on a field of view of the at least one first fused image. The third image and the fourth image may be fused to obtain a second fused image.
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9.发明授权公开(公告)号：US12101563B2
公开(公告)日：2024-09-24
申请号：US17456117
申请日：2021-11-22
发明人： Jing Wang , Jiafu Luo , Silei Ma , Xiaoyun Jiang
IPC分类号： H04N23/741 , H04N23/73 , H04N25/585
CPC分类号： H04N23/741 , H04N23/73 , H04N25/585
摘要： This disclosure provides systems, methods, and devices for image signal processing that support improved detail keeping in photography through increased dynamic range and/or highlight-keeping. The image signal processing may be performed on data received from a split-pixel image sensor with two sets of sensor elements with different sensitivities. The image signal processing may include receiving image data comprising: first data from a first set of sensor elements and second data from a second set of sensor elements capturing a representation of the scene with a different sensitivity that the first set of sensor elements; determining an output dynamic range for an output image frame; and determining an output image frame based on at least one of the first data and the second data and based on the output dynamic range. Other aspects and features are also claimed and described.
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公开(公告)号：US20240185390A1
公开(公告)日：2024-06-06
申请号：US18061856
申请日：2022-12-05
发明人： Xiaoyun Jiang , Nyeongkyu Kwon
CPC分类号： G06T5/50 , G06T5/003 , G06T5/009 , G06T5/20 , G06T7/20 , G06T2207/10016 , G06T2207/10144 , G06T2207/20201 , G06T2207/20208 , G06T2207/20221
摘要： This disclosure provides systems, methods, and devices for image signal processing detect and correct motion during HDR fusion. In a first aspect, a method is provided that includes receiving a first image frame, a second image frame, and a third image frame. The second image frame may be captured with a short exposure time and the third image frame may be captured with a long exposure time. The method may include determining a first motion map based on the first and third image frames and a second motion map based on the second and third image frames. A third motion map may be determined based on the first and second motion maps and used to determine a fourth image frame by combining the second and third image frames. Other aspects and features are also claimed and described.
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