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11. 发明申请

US20120050563A1 FLEXIBLE COLOR SPACE SELECTION FOR AUTO-WHITE BALANCE PROCESSING 有权
标题翻译：用于自动白平衡处理的柔性颜色空间选择
公开(公告)号：US20120050563A1
公开(公告)日：2012-03-01
申请号：US12873973
申请日：2010-09-01
申请人： Guy Côté , Jeffrey E. Frederiksen , Paul Matthew Hubel , Sumit Chawla
发明人： Guy Côté , Jeffrey E. Frederiksen , Paul Matthew Hubel , Sumit Chawla
IPC分类号： H04N9/73
CPC分类号： H04N9/735 , H04N5/235 , H04N9/045
摘要： Various techniques are disclosed for processing statistics data in an image signal processor (ISP). In one embodiment, a statistics collection engine may be configured to acquire statistics relating to auto white-balance. The statistics collection engine may receive raw Bayer RGB data acquired by an image sensor and may be configured to perform one or more color space conversions to obtain pixel data in other color spaces. A set of pixel filters may be configured to accumulate sums of the pixel data conditionally based upon YC1C2 characteristics, as defined by a pixel condition per pixel filter. Depending on a selected color space, the pixel filters may generate color sums, which may be used to match a current illuminant against a set of reference illuminants with which the image sensor has been previously calibrated.
摘要翻译：公开了用于处理图像信号处理器（ISP）中的统计数据的各种技术。在一个实施例中，统计收集引擎可以被配置为获取与自动白平衡有关的统计。统计收集引擎可以接收由图像传感器获取的原始拜耳RGB数据，并且可以被配置为执行一个或多个颜色空间转换以获得其他颜色空间中的像素数据。一组像素滤波器可以被配置为基于每像素滤波器的像素条件定义的YC1C2特性有条件地累加像素数据的和。根据所选择的颜色空间，像素滤波器可以生成颜色和，其可以用于将当前光源与图像传感器已经被预先校准的一组参考光源相匹配。

12. 发明申请

US20110090351A1 TEMPORAL FILTERING TECHNIQUES FOR IMAGE SIGNAL PROCESSING 有权
标题翻译：用于图像信号处理的时间滤波技术
公开(公告)号：US20110090351A1
公开(公告)日：2011-04-21
申请号：US12789821
申请日：2010-05-28
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N5/225 , G06K9/00
CPC分类号： H04N5/232 , G06T5/002 , G06T5/008 , G06T2207/20182 , H04N5/23232 , H04N5/2355 , H04N9/045
摘要： Various techniques for temporally filtering raw image data acquired by an image sensor are provided. In one embodiment, a temporal filter determines a spatial location of a current pixel and identifies at least one collocated reference pixel from a previous frame. A motion delta value is determined based at least partially upon the current pixel and its collocated reference pixel. Next, an index is determined based upon the motion delta value and a motion history value corresponding to the spatial location of the current pixel, but from the previous frame. Using the index, a first filtering coefficient may be selected from a motion table. After selecting the first filtering coefficient, an attenuation factor may be selected from a luma table based upon the value of the current pixel, and a second filtering coefficient may subsequently be determined based upon the selected attenuation factor and the first filtering coefficient. The temporally filtered output value corresponding to the current pixel may then be calculated based upon the second filtering coefficient, the current pixel, and the collocated reference pixel.
摘要翻译：提供了用于时间滤波由图像传感器获取的原始图像数据的各种技术。在一个实施例中，时间滤波器确定当前像素的空间位置并且识别来自先前帧的至少一个并置参考像素。至少部分地基于当前像素及其并置参考像素来确定运动增量值。接下来，基于与当前像素的空间位置对应的运动增量值和运动历史值，但是从前一帧确定索引。使用该索引，可以从运动表中选择第一过滤系数。在选择第一滤波系数之后，可以基于当前像素的值从亮度表中选择衰减因子，并且随后可以基于所选择的衰减因子和第一滤波系数来确定第二滤波系数。然后可以基于第二滤波系数，当前像素和并置参考像素来计算对应于当前像素的时间滤波的输出值。

13. 发明授权

US08629913B2 Overflow control techniques for image signal processing 有权
标题翻译：图像信号处理溢出控制技术
公开(公告)号：US08629913B2
公开(公告)日：2014-01-14
申请号：US12895674
申请日：2010-09-30
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N5/228 , H04N5/76 , H04N7/12 , H04N5/00 , G06F11/00 , H04B1/66
CPC分类号： H04N5/335
摘要： Certain embodiments disclosed herein relate to an image signal processing system includes overflow control logic that detects an overflow condition when a destination unit when a sensor input queue and/or front-end processing unit receives back pressure from a downstream destination unit. In one embodiment, pixels of a current frame are dropped when an overflow condition occurs. The number of dropped pixels may be tracked using a counter. Upon recovery of the overflow condition, the remaining pixels of the frame are received and each dropped pixel may be replaced using a replacement pixel value.
摘要翻译：本文公开的某些实施例涉及一种图像信号处理系统，包括溢出控制逻辑，当传感器输入队列和/或前端处理单元从下游目的地单元接收到反向压力时，检测目标单元时的溢出状况。在一个实施例中，当溢出状态发生时，当前帧的像素被丢弃。可以使用计数器跟踪丢弃像素的数量。在恢复溢出状态时，接收帧的剩余像素，并且可以使用替换像素值来替换每个丢弃的像素。

14. 发明申请

US20120081580A1 OVERFLOW CONTROL TECHNIQUES FOR IMAGE SIGNAL PROCESSING 有权
标题翻译：用于图像信号处理的溢出控制技术
公开(公告)号：US20120081580A1
公开(公告)日：2012-04-05
申请号：US12895674
申请日：2010-09-30
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N5/225
CPC分类号： H04N5/335
摘要： Certain embodiments disclosed herein relate to an image signal processing system includes overflow control logic that detects an overflow condition when a destination unit when a sensor input queue and/or front-end processing unit receives back pressure from a downstream destination unit. In one embodiment, pixels of a current frame are dropped when an overflow condition occurs. The number of dropped pixels may be tracked using a counter. Upon recovery of the overflow condition, the remaining pixels of the frame are received and each dropped pixel may be replaced using a replacement pixel value.
摘要翻译：本文公开的某些实施例涉及一种图像信号处理系统，包括溢出控制逻辑，当传感器输入队列和/或前端处理单元从下游目的地单元接收到反向压力时，检测目标单元时的溢出状况。在一个实施例中，当溢出状态发生时，当前帧的像素被丢弃。可以使用计数器跟踪丢弃像素的数量。在恢复溢出状态时，接收帧的剩余像素，并且可以使用替换像素值来替换每个丢弃的像素。

15. 发明授权

US08786625B2 System and method for processing image data using an image signal processor having back-end processing logic 有权
标题翻译：使用具有后端处理逻辑的图像信号处理器处理图像数据的系统和方法
公开(公告)号：US08786625B2
公开(公告)日：2014-07-22
申请号：US12894833
申请日：2010-09-30
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： G09G5/02
CPC分类号： H04N9/735 , G06K9/00234 , G06T3/4015 , G06T5/008 , H04N5/23219
摘要： Disclosed embodiments provide for a an image signal processing system that includes back-end pixel processing unit that receives pixel data after being processed by at least one of a front-end pixel processing unit and a pixel processing pipeline. In certain embodiments, the back-end processing unit receives luma/chroma image data and may be configured to apply face detection operations, local tone mapping, bright, contrast, color adjustments, as well as scaling. Further, the back-end processing unit may also include a back-end statistics unit that may collect frequency statistics. The frequency statistics may be provided to an encoder and may be used to determine quantization parameters that are to be applied to an image frame.
摘要翻译：公开的实施例提供一种图像信号处理系统，其包括后端像素处理单元，其在由前端像素处理单元和像素处理流水线中的至少一个处理之后接收像素数据。在某些实施例中，后端处理单元接收亮度/色度图像数据，并且可以被配置为应用面部检测操作，局部色调映射，亮度，对比度，颜色调整以及缩放。此外，后端处理单元还可以包括可以收集频率统计的后端统计单元。频率统计可以提供给编码器，并且可以用于确定要应用于图像帧的量化参数。

16. 发明申请

US20120050566A1 TECHNIQUES FOR COLLECTION OF AUTO-FOCUS STATISTICS 有权
标题翻译：收集自动聚焦统计的技术
公开(公告)号：US20120050566A1
公开(公告)日：2012-03-01
申请号：US12873989
申请日：2010-09-01
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N9/73
CPC分类号： H04N9/735 , H04N5/23212 , H04N5/347 , H04N5/367 , H04N9/045
摘要： Various techniques are disclosed for collecting and processing auto-focus statistics data in an image signal processor (ISP). In one embodiment, a statistics collection engine in an ISP front-end processing unit may be configured to collect coarse (based on decimated raw data) and fine auto-focus statistics. Coarse auto-focus statistics may be collected on decimated Bayer RGB data and/or on linear camera luma values. Fine auto-focus statistics may be collected on raw Bayer RGB using a combination of a horizontal filter and edge detector, or may be collected on BayerY data (by applying a 3×1 transform to the raw Bayer RGB data). Edge sums may be accumulated using the filter outputs to determine auto-focus statistics.
摘要翻译：公开了用于在图像信号处理器（ISP）中收集和处理自动对焦统计数据的各种技术。在一个实施例中，ISP前端处理单元中的统计收集引擎可以被配置为收集粗略（基于抽取的原始数据）和精细的自动对焦统计。可以在抽取的拜耳RGB数据和/或线性相机亮度值上收集粗略的自动对焦统计数据。可以使用水平滤波器和边缘检测器的组合在原始拜耳RGB上收集精细的自动对焦统计信息，或者可以在拜耳数据上收集（通过对原始拜耳RGB数据应用3×1变换）。可以使用滤波器输出积累边沿和，以确定自动对焦统计。

17. 发明申请

US20110090381A1 SYSTEM AND METHOD FOR PROCESSING IMAGE DATA USING AN IMAGE PROCESSING PIPELINE OF AN IMAGE SIGNAL PROCESSOR 有权
标题翻译：使用图像信号处理器的图像处理管线处理图像数据的系统和方法
公开(公告)号：US20110090381A1
公开(公告)日：2011-04-21
申请号：US12789815
申请日：2010-05-28
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N9/64
CPC分类号： H04N9/045 , G06T3/4015 , H04N5/3675 , H04N2209/046
摘要： Various techniques are provided herein for processing raw image data acquired using a digital image sensor in an image processing pipeline of an image signal processing system. In one embodiment, the image processing pipeline may first process the raw image data (e.g., Bayer image data) for the detection and correction of defective pixels. Next, the image processing pipeline may process the raw image data to reduce noise. Thereafter, the image processing pipeline may correct lens shading distortion in the raw image data and, subsequently, apply a demosaicing algorithm to convert the raw image data into full color image data (e.g., RGB image data). The color image data may be further processed by the image processing pipeline to correct color and gamma properties prior to being converted into a luma and chroma color space (e.g., YCbCr color space).
摘要翻译：本文提供了用于处理在图像信号处理系统的图像处理流水线中使用数字图像传感器获取的原始图像数据的各种技术。在一个实施例中，图像处理流水线可以首先处理原始图像数据（例如，拜耳图像数据）以用于缺陷像素的检测和校正。接下来，图像处理流水线可以处理原始图像数据以降低噪声。此后，图像处理流水线可以校正原始图像数据中的透镜遮蔽失真，并且随后应用去马赛克算法将原始图像数据转换为全色图像数据（例如，RGB图像数据）。彩色图像数据可以由图像处理流水线进一步处理，以在被转换为亮度和色度色彩空间（例如，YCbCr颜色空间）之前校正颜色和伽马性质。

18. 发明申请

US20110090380A1 IMAGE SIGNAL PROCESSOR FRONT-END IMAGE DATA PROCESSING SYSTEM AND METHOD 有权
标题翻译：图像信号处理器前端图像数据处理系统和方法
公开(公告)号：US20110090380A1
公开(公告)日：2011-04-21
申请号：US12789810
申请日：2010-05-28
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N9/64
CPC分类号： H04N9/045 , G06T3/4015 , H04N5/3675 , H04N2209/046
摘要： Various techniques are provided herein for processing raw image data in front-end processing logic of an image signal processing system. In one embodiment, the front-end processing logic includes a statistics processing unit configured to process raw image data acquired by an image sensor to obtain one or more sets of statistics. The statistics processing unit may first correct defective pixels in the raw image data and then correct lens shading errors in the raw image data prior to extracting the statistics information. In certain embodiments, black level compensation may be applied between the defective pixel correction and lens shading correction steps, and inverse black level compensation may be applied between the lens shading correction step and the extraction of the statistics information. The acquired statistics information may be utilized by an image signal processing pipeline for converting the raw image data into a color (e.g., RGB) and/or luma (e.g., YCbCr) image.
摘要翻译：本文提供了用于在图像信号处理系统的前端处理逻辑中处理原始图像数据的各种技术。在一个实施例中，前端处理逻辑包括：统计处理单元，被配置为处理由图像传感器获取的原始图像数据，以获得一组或多组统计。统计处理单元可以首先校正原始图像数据中的缺陷像素，然后在提取统计信息之前校正原始图像数据中的透镜阴影错误。在某些实施例中，可以在缺陷像素校正和透镜阴影校正步骤之间应用黑电平补偿，并且可以在透镜阴影校正步骤和提取统计信息之间应用反黑电平补偿。获取的统计信息可以由图像信号处理流水线利用，用于将原始图像数据转换成颜色（例如RGB）和/或亮度（例如，YCbCr）图像。

19. 发明授权

US09398205B2 Auto-focus control using image statistics data with coarse and fine auto-focus scores 有权
标题翻译：使用粗细和精细自动对焦分数的图像统计数据进行自动对焦控制
公开(公告)号：US09398205B2
公开(公告)日：2016-07-19
申请号：US12873978
申请日：2010-09-01
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： G03B13/36 , G03B3/10 , H04N5/232
CPC分类号： H04N5/23212 , G03B3/10 , G03B13/36
摘要： Techniques are provided for determining an optimal focal position using auto-focus statistics. In one embodiment, such techniques may include generating coarse and fine auto-focus scores for determining an optimal focal length at which to position a lens associated with the image sensor. For instance, the statistics logic may determine a coarse position that indicates an optimal focus area which, in one embodiment, may be determined by searching for the first coarse position in which a coarse auto-focus score decreases with respect to a coarse auto-focus score at a previous position. Using this position as a starting point for fine score searching, the optimal focal position may be determined by searching for a peak in fine auto-focus scores. In another embodiment, auto-focus statistics may also be determined based on each color of the Bayer RGB, such that, even in the presence of chromatic aberrations, relative auto-focus scores for each color may be used to determine the direction of focus.
摘要翻译：提供了使用自动对焦统计来确定最佳焦点位置的技术。在一个实施例中，这样的技术可以包括产生用于确定与图像传感器相关联的透镜定位的最佳焦距的粗略和精细的自动对焦分数。例如，统计逻辑可以确定指示最佳聚焦区域的粗略位置，其在一个实施例中可以通过搜索粗略自动对焦得分相对于粗略自动对焦而减小的第一粗略位置来确定在以前的位置得分。使用该位置作为精细分数搜索的起点，可以通过在精细自动对焦分数中搜索峰值来确定最佳焦点位置。在另一个实施例中，还可以基于拜耳RGB的每种颜色来确定自动对焦统计，使得即使在存在色差的情况下，也可以使用每种颜色的相对自动对焦分数来确定焦点的方向。

20. 发明授权

US08736700B2 Techniques for synchronizing audio and video data in an image signal processing system 有权
标题翻译：用于在图像信号处理系统中同步音频和视频数据的技术
公开(公告)号：US08736700B2
公开(公告)日：2014-05-27
申请号：US12895299
申请日：2010-09-30
申请人： Guy Côté , Jeffrey E. Frederiksen
发明人： Guy Côté , Jeffrey E. Frederiksen
IPC分类号： H04N5/228 , H04N5/76 , H04N5/932
CPC分类号： H04N21/4223 , H04N21/41407 , H04N21/4302
摘要： The present disclosure provides techniques for performing audio-video synchronization using an image signal processing system. In one embodiment, a time code register provides a current time stamp when sampled. The value of the time code register may be incremented at regular intervals based on a clock of the image signal processing system. At the start of a current frame acquired by an image sensor, the time code register is sampled, and a timestamp is stored into a timestamp register associated with the image sensor. The timestamp is then read from the time stamp register and written to a set of metadata associated with the current frame. The timestamp stored in the frame metadata may then be used to synchronize the current frame with a corresponding set of audio data.
摘要翻译：本公开提供了使用图像信号处理系统执行音频 - 视频同步的技术。在一个实施例中，时间码寄存器提供当采样时的当前时间戳。可以基于图像信号处理系统的时钟以规则的间隔增加时间码寄存器的值。在由图像传感器获取的当前帧的开始处，时间码寄存器被采样，并且时间戳被存储到与图像传感器相关联的时间戳寄存器中。然后从时间戳寄存器读取时间戳并将其写入与当前帧相关联的一组元数据。存储在帧元数据中的时间戳可以用于将当前帧与对应的一组音频数据同步。

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