Temporal filtering techniques for image signal processing
    61.
    发明授权
    Temporal filtering techniques for image signal processing 有权
    用于图像信号处理的时间滤波技术

    公开(公告)号:US08593483B2

    公开(公告)日:2013-11-26

    申请号:US12789821

    申请日:2010-05-28

    IPC分类号: G09G5/00

    摘要: Temporally filtering raw image data may include a temporal filter that 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 upon the current pixel and its collocated reference pixel. An index is determined based upon the motion delta value and a motion history value corresponding to the current pixel from the previous frame. Using the index, a first filtering coefficient may be selected from a motion table. Then an attenuation factor may be selected from a luma table based upon the value of the current pixel, and a second filtering coefficient may 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 based upon the second filtering coefficient, the current pixel, and the collocated reference pixel.

    摘要翻译: 时间过滤原始图像数据可以包括时间滤波器,其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。 基于当前像素及其并置参考像素来确定运动增益值。 基于来自前一帧的当前像素的运动增量值和运动历史值来确定索引。 使用该索引,可以从运动表中选择第一过滤系数。 然后可以基于当前像素的值从亮度表中选择衰减因子,并且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。 对应于当前像素的时间滤波的输出值然后可以基于第二滤波系数,当前像素和并置参考像素。

    Automatic tone mapping for cameras
    62.
    发明授权
    Automatic tone mapping for cameras 有权
    相机自动色调映射

    公开(公告)号:US08358351B2

    公开(公告)日:2013-01-22

    申请号:US12479629

    申请日:2009-06-05

    IPC分类号: H04N5/228 H04N5/202

    CPC分类号: H04N5/202

    摘要: A device, method, computer useable medium, and processor programmed to automatically generate tone mapping curves in a digital camera based on image metadata are described. By examining image metadata from a digital camera's sensor, such as the light-product, one can detect sun-lit, high-light, and low-light scenes. Once the light-product value has been calculated for a given image, a tone mapping curve can automatically be generated within the sensor and adjusted appropriately for the scene based on predetermined parameters. Further, it has been determined that independently varying the slopes of the tone mapping curve at the low end (S0) and high end (S1) of the curve results in more visually appealing images. By dynamically and independently selecting S0 and S1 values based on image metadata, more visually pleasing images can be generated.

    摘要翻译: 描述了基于图像元数据在数字照相机中自动生成色调映射曲线的设备,方法,计算机可用介质和处理器。 通过从数码相机的传感器(如光产品)中检查图像元数据,可以检测到日光,高光和低光的场景。 一旦为给定图像计算了光产品值,就可以在传感器内自动生成色调映射曲线,并根据预定参数对场景进行适当调整。 此外,已经确定,在曲线的低端(S0)和高端(S1)处独立地改变色调映射曲线的斜率导致更加视觉吸引人的图像。 通过基于图像元数据动态地且独立地选择S0和S1值,可以产生更令人满意的图像。

    Method and apparatus for modeling quantization matrices for image/video encoding
    63.
    发明授权
    Method and apparatus for modeling quantization matrices for image/video encoding 有权
    用于建模图像/视频编码的量化矩阵的方法和装置

    公开(公告)号:US08326068B1

    公开(公告)日:2012-12-04

    申请号:US11512736

    申请日:2006-08-30

    申请人: Huipin Zhang Guy Cote

    发明人: Huipin Zhang Guy Cote

    IPC分类号: G06K9/00

    摘要: A method for encoding an image is disclosed. The method generally includes the steps, of (A) generating a quantization matrix as a function of at least four parameters, (B) optimizing the parameters to maximize a quality metric for encoding the image and (C) encoding the image with the quantization matrix as optimized.

    摘要翻译: 公开了一种图像编码方法。 该方法通常包括以下步骤:(A)生成作为至少四个参数的函数的量化矩阵,(B)优化参数以最大化用于编码图像的质量度量;(C)使用量化矩阵对图像进行编码 优化。

    Aligning Images
    64.
    发明申请
    Aligning Images 有权
    对齐图像

    公开(公告)号:US20120002899A1

    公开(公告)日:2012-01-05

    申请号:US12876097

    申请日:2010-09-03

    IPC分类号: G06K9/36 G06K9/32

    摘要: Some embodiments provide a method of aligning a pair of images. The method defines multiple different pairs of images at multiple different resolutions. The method hierarchically aligns the original pair of images by first aligning the pair of images at the lowest resolution and then aligning each pair of images at each higher resolution based on the alignments of the pair of images at the lower resolutions. For some of the resolutions, to perform the hierarchically alignment, the method identifies, for at least one image at each resolution, portions that are suitable for performing the alignment and portions that are not suitable for performing the alignment. The method compares each pair of images at a particular resolution by using the suitable portions while excluding the unsuitable portions from the comparison.

    摘要翻译: 一些实施例提供了对准一对图像的方法。 该方法以多种不同的分辨率定义了多个不同的图像对。 该方法通过首先以最低分辨率对准该对图像,然后基于较低分辨率下的该对图像的对准,以每个较高分辨率对准每对图像来分级地对准原始图像对。 对于一些分辨率,为了执行分层对准,该方法针对每个分辨率下的至少一个图像识别适合于执行对准的部分和不适于执行对准的部分。 该方法通过使用合适的部分以特定分辨率比较每对图像,同时排除比较中的不合适部分。

    METHOD FOR VIDEO DEINTERLACING AND FORMAT CONVERSION
    65.
    发明申请
    METHOD FOR VIDEO DEINTERLACING AND FORMAT CONVERSION 有权
    视频去除和格式转换的方法

    公开(公告)号:US20110096231A1

    公开(公告)日:2011-04-28

    申请号:US12983999

    申请日:2011-01-04

    IPC分类号: H04N7/01

    摘要: A method for deinterlacing a picture is disclosed. The method generally includes the steps of (A) generating a plurality of primary scores by searching along a plurality of primary angles for an edge in the picture proximate a location interlaced with a field of the picture, (B) generating a plurality of neighbor scores by searching for the edge along a plurality of neighbor angles proximate a particular angle of the primary angles corresponding to a particular score of the primary scores having a best value and (C) identifying a best score from a group of scores consisting of the particular score and the neighbor scores to generate an interpolated sample at the location.

    摘要翻译: 公开了一种用于去隔行扫描图像的方法。 该方法通常包括以下步骤:(A)通过沿图像中的边缘邻近的图像的边缘沿多个主角度搜索生成多个主分数,(B)生成多个相邻分数 通过搜索沿着与具有最佳值的主分数的特定分数相对应的主角度的特定角度的多个相邻角度的边缘,以及(C)从由特定分数组成的分数组中识别最佳分数 和邻居得分,以在该位置生成内插样本。

    SYSTEM AND METHOD FOR SHARPENING IMAGE DATA
    66.
    发明申请
    SYSTEM AND METHOD FOR SHARPENING IMAGE DATA 有权
    用于缩放图像数据的系统和方法

    公开(公告)号:US20110090370A1

    公开(公告)日:2011-04-21

    申请号:US12582390

    申请日:2009-10-20

    IPC分类号: H04N9/68 G06K9/00

    摘要: Various techniques relating to image sharpening are provided. In one embodiment, a luminance image is obtained based upon image data acquired by an image sensor. A multi-scale unsharp mask, which may include at least two Gaussian filters of difference radii, is applied to the luminance image to determine a plurality of unsharp values. Each of the unsharp values may be compared to a corresponding threshold and, for the unsharp values that exceed their respective thresholds, the unsharp value is multiplied by a corresponding gain and added to a base image, which may be selected as the luminance image or the output of one of the Gaussian filters. Each gained unsharp value may be summed with the base image to produce a final sharpened output. In some embodiments, an attenuated gain may be applied to unsharp values that do not exceed their respective thresholds.

    摘要翻译: 提供了与图像锐化有关的各种技术。 在一个实施例中,基于由图像传感器获取的图像数据获得亮度图像。 可以将包括差分半径的至少两个高斯滤波器的多尺度锐化掩模应用于亮度图像以确定多个不清晰值。 可以将每个不清晰值与相应的阈值进行比较,并且对于超过其相应阈值的不清晰值,将钝化值乘以相应的增益,并将其添加到可被选择为亮度图像的基本图像 输出一个高斯滤波器。 每个获得的钝化值可以与基本图像相加以产生最终的锐化输出。 在一些实施例中,衰减增益可以应用于不超过它们各自的阈值的钝化值。

    Method and/or architecture for controlling encoding parameters using integrated information from camera ISP
    67.
    发明授权
    Method and/or architecture for controlling encoding parameters using integrated information from camera ISP 有权
    使用来自相机ISP的综合信息来控制编码参数的方法和/或架构

    公开(公告)号:US07733380B1

    公开(公告)日:2010-06-08

    申请号:US11564483

    申请日:2006-11-29

    摘要: A camera including a first circuit and a second circuit. The first circuit may be configured to perform image signal processing and control one or more functions of the camera using image signal processing related information and encoding related information. The second circuit may be configured to encode image data using the image signal processing related information and camera settings information. The first circuit may be further configured to pass the image signal processing related information and the camera settings information to the second circuit. The second circuit may be further configured to pass the encoding related information to the first circuit.

    摘要翻译: 一种包括第一电路和第二电路的照相机。 第一电路可以被配置为使用图像信号处理相关信息和编码相关信息来执行图像信号处理和控制相机的一个或多个功能。 第二电路可以被配置为使用图像信号处理相关信息和相机设置信息对图像数据进行编码。 第一电路还可以被配置为将图像信号处理相关信息和相机设置信息传递给第二电路。 第二电路可以被进一步配置为将编码相关信息传递给第一电路。

    Method and apparatus for video deinterlacing and format conversion
    68.
    发明授权
    Method and apparatus for video deinterlacing and format conversion 有权
    用于视频去隔行和格式转换的方法和装置

    公开(公告)号:US07659939B2

    公开(公告)日:2010-02-09

    申请号:US12025233

    申请日:2008-02-04

    IPC分类号: H04N7/01 G06K9/40

    CPC分类号: H04N7/012

    摘要: A method for deinterlacing a picture is disclosed. The method generally includes the steps of (A) calculating a potential sample at a location interfaced with a first field of the picture by temporal filtering, (B) evaluating a protection condition in a current region around the location after inclusion of the potential sample and (C) calculating an interpolated sample at the location by vertical spatial filtering the first field in response to the protection condition indicating a significant increase in a vertical activity within the current region due to the potential sample.

    摘要翻译: 公开了一种用于去隔行扫描图像的方法。 该方法通常包括以下步骤:(A)通过时间滤波在与图像的第一场接口的位置处计算潜在样本;(B)评估在包含潜在样本之后的位置周围的当前区域中的保护条件;以及 (C)响应于指示由于潜在样本导致的当前区域内的垂直活动的显着增加的保护条件,通过对第一场进行垂直空间滤波来计算位置处的插值样本。

    Adaptive reference picture selection based on inter-picture motion measurement
    69.
    发明授权
    Adaptive reference picture selection based on inter-picture motion measurement 有权
    基于图像间运动测量的自适应参考图像选择

    公开(公告)号:US07602849B2

    公开(公告)日:2009-10-13

    申请号:US10714736

    申请日:2003-11-17

    申请人: Simon Booth Guy Cote

    发明人: Simon Booth Guy Cote

    IPC分类号: H04N7/12 H04N7/32

    摘要: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a control signal in response to a measurement of inter-picture motion between a current picture and a first reference picture. The second circuit may be configured to select the first reference picture or a second reference picture as a better reference picture for motion estimation in response to the control signal.

    摘要翻译: 一种包括第一电路和第二电路的装置。 第一电路可以被配置为响应于当前图像和第一参考图像之间的图像间运动的测量而产生控制信号。 第二电路可以被配置为响应于控制信号来选择第一参考图片或第二参考图片作为用于运动估计的更好的参考图片。

    Graphical symbols for H.264 bitstream syntax elements
    70.
    发明授权
    Graphical symbols for H.264 bitstream syntax elements 有权
    H.264比特流语法元素的图形符号

    公开(公告)号:US07362804B2

    公开(公告)日:2008-04-22

    申请号:US10720783

    申请日:2003-11-24

    IPC分类号: H04N7/12 G06F3/01

    CPC分类号: H04N19/44 H04N19/61 H04N19/70

    摘要: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a decoded video signal and syntax elements in response to an encoded bitstream. The second circuit may be configured to generate one or more overlay images in response to the syntax elements. The overlay images generally comprise graphical symbols representing the syntax elements of the encoded bitstream.

    摘要翻译: 一种包括第一电路和第二电路的装置。 第一电路可以被配置为响应于编码的比特流产生解码的视频信号和语法元素。 第二电路可以被配置为响应于语法元素生成一个或多个覆盖图像。 覆盖图像通常包括表示编码比特流的语法元素的图形符号。