Correction of non-uniform sensitivity in an image array
    92.
    发明授权
    Correction of non-uniform sensitivity in an image array 有权
    校正图像阵列中不均匀的灵敏度

    公开(公告)号:US07609302B2

    公开(公告)日:2009-10-27

    申请号:US10915454

    申请日:2004-08-11

    IPC分类号: H04N5/217

    CPC分类号: H04N5/3572

    摘要: An improved non-uniform sensitivity correction algorithm for use in an imager device (e.g., a CMOS APS). The algorithm provides zones having flexible boundaries which can be reconfigured depending upon the type of lens being used in a given application. Each pixel within each zone is multiplied by a correction factor dependent upon the particular zone while the pixel is being read out from the array. The amount of sensitivity adjustment required for a given pixel depends on the type of lens being used, and the same correction unit can be used with multiple lenses where the zone boundaries and the correction factors are adjusted for each lens. In addition, the algorithm makes adjustments to the zone boundaries based upon a misalignment between the centers of the lens being used and the APS array.

    摘要翻译: 用于成像器装置(例如,CMOS APS)的改进的非均匀灵敏度校正算法。 该算法提供具有灵活边界的区域,其可以根据在给定应用中使用的透镜的类型而被重新配置。 每个区域内的每个像素乘以一个校正因子,取决于特定的区域,同时从阵列中读出像素。 给定像素所需的灵敏度调整量取决于所使用的透镜的类型,并且相同的校正单元可以与多个透镜一起使用,其中针对每个透镜调整区域边界和校正因子。 此外,该算法基于所使用的透镜的中心与APS阵列之间的未对准来对区域边界进行调整。

    METHOD AND APPARATUS FOR IMAGE SIGNAL COLOR CORRECTION WITH REDUCED NOISE
    93.
    发明申请
    METHOD AND APPARATUS FOR IMAGE SIGNAL COLOR CORRECTION WITH REDUCED NOISE 有权
    用于减少噪声的图像信号颜色校正的方法和装置

    公开(公告)号:US20090245632A1

    公开(公告)日:2009-10-01

    申请号:US12059733

    申请日:2008-03-31

    IPC分类号: G06K9/00

    CPC分类号: H04N1/6027

    摘要: A method and apparatus for applying color correction to image signals provides different color corrections depending on a characterization associated with a pixel signal being processed or the gain applied to the pixel signal such as a value of a pixel signal being processed. The color corrections may be configured such that darker pixels have less color correction applied to them.

    摘要翻译: 用于对图像信号进行颜色校正的方法和装置根据与被处理的像素信号相关联的特征或应用于像素信号的增益(例如正在处理的像素信号的值),提供不同的颜色校正。 可以配置颜色校正,使得较暗的像素对其施加较少的颜色校正。

    Method, apparatus, and system for reduction of line processing memory size used in image processing
    94.
    发明申请
    Method, apparatus, and system for reduction of line processing memory size used in image processing 有权
    用于减少图像处理中使用的行处理存储器大小的方法,装置和系统

    公开(公告)号:US20090027727A1

    公开(公告)日:2009-01-29

    申请号:US11878605

    申请日:2007-07-25

    申请人: Ilia Ovsiannikov

    发明人: Ilia Ovsiannikov

    IPC分类号: G06F15/00

    CPC分类号: G06T1/20

    摘要: A method, apparatus, and system are provided by which image line data of an image frame is compressed before being stored to image line memory used in multiple image line processing.

    摘要翻译: 提供了一种方法,装置和系统,通过该图像帧的图像行数据被存储到多个图像行处理中使用的图像行存储器中。

    Method and circuit for determining the response curve knee point in active pixel image sensors with extended dynamic range
    95.
    发明授权
    Method and circuit for determining the response curve knee point in active pixel image sensors with extended dynamic range 有权
    用于确定具有扩展动态范围的有源像素图像传感器中的响应曲线拐点的方法和电路

    公开(公告)号:US07456884B2

    公开(公告)日:2008-11-25

    申请号:US10633673

    申请日:2003-08-05

    IPC分类号: H04N5/335 H04N5/217

    CPC分类号: H04N5/35509

    摘要: An apparatus and method for measuring the breakpoint of a response curve representing the voltage output of an image array having an extended dynamic range. By flooding a light-opaque pixel with a charge and then applying an intermediate reset voltage to the pixel, the signal is read from the pixel and stored. The full reset voltage is applied to the pixel, and then the signal in the pixel is read and stored. The voltage output difference is the difference between the first and second stored signal. The voltage output difference is then used to determine the voltage of the knee point. Further, a conventional saturated pixel can be reset with an intermediate reset just prior to readout. The resulting signal can then be used to determine the voltage of the knee point.

    摘要翻译: 一种用于测量表示具有扩展动态范围的图像阵列的电压输出的响应曲线的断点的装置和方法。 通过用充电填充不透明的像素,然后对像素施加中间复位电压,从像素读取信号并存储。 将全部复位电压施加到像素,然后读取并存储像素中的信号。 电压输出差是第一和第二存储信号之间的差。 然后使用电压输出差异来确定拐点的电压。 此外,传统的饱和像素可以在读出之前用中间复位来复位。 然后可以使用所得到的信号来确定拐点的电压。

    Backlit subject detection in an image
    96.
    发明申请
    Backlit subject detection in an image 有权
    在图像中的背光对象检测

    公开(公告)号:US20080056705A1

    公开(公告)日:2008-03-06

    申请号:US11513570

    申请日:2006-08-31

    申请人: Ilia Ovsiannikov

    发明人: Ilia Ovsiannikov

    IPC分类号: G03B7/08

    CPC分类号: G03B7/08

    摘要: An image window is subdivided into a plurality of sub-windows arranged in a rectangular grid pattern. The average brightness of the window and each sub-window is determined. A sub-window is tagged as dark if its average brightness is a predetermined percentage of the window average brightness. If the sub-window in the center of the grid pattern is considered to be dark, a segmentation is performed to detect a main backlit subject. The comparison of sub-window brightness is continued from the center sub-window in outward sequential, side adjacent rows and columns of sub-windows. Each sub-window that meets the above-described criterion for being dark is tagged as dark. The image is considered to have a main backlit subject if, in one embodiment, the subject is comprised of a predetermined quantity of continuous, dark sub-windows.

    摘要翻译: 图像窗口被细分为以矩形网格图案排列的多个子窗口。 确定窗口和每个子窗口的平均亮度。 如果平均亮度是窗口平均亮度的预定百分比,则子窗口被标记为暗。 如果网格图案中心的子窗口被认为是暗的,则执行分割以检测主背光对象。 子窗口亮度的比较从中央子窗口继续向外顺序,侧面相邻的行和子窗口列。 满足上述黑暗标准的每个子窗口被标记为黑色。 如果在一个实施例中,被摄体由预定数量的连续的暗子窗构成,则该图像被认为具有主背光主体。

    Method, apparatus and system for dynamic range estimation of imaged scenes
    97.
    发明申请
    Method, apparatus and system for dynamic range estimation of imaged scenes 有权
    用于动态范围估计的成像场景的方法,装置和系统

    公开(公告)号:US20080056704A1

    公开(公告)日:2008-03-06

    申请号:US11512302

    申请日:2006-08-30

    申请人: Ilia Ovsiannikov

    发明人: Ilia Ovsiannikov

    IPC分类号: G03B7/08

    CPC分类号: G03B7/08

    摘要: A method, apparatus, and system for dynamic range estimation of imaged scenes for automatic exposure control. For a given exposure time setting, certain areas of a scene may be brighter than what a camera can capture. In cameras, including those experiencing substantial lens vignetting, a gain stage may be used to extend dynamic range and extract auto-exposure data from the extended dynamic range. Alternatively, dynamic range can be extended using pre-capture image information taken under reduced exposure conditions.

    摘要翻译: 用于自动曝光控制的成像场景的动态范围估计的方法,装置和系统。 对于给定的曝光时间设置,场景的某些区域可能比照相机可以捕获更亮。 在相机中,包括那些经历大量透镜渐晕的相机,增益级可用于扩展动态范围,并从扩展动态范围中提取自动曝光数据。 或者,可以使用在减少的曝光条件下拍摄的预拍摄图像信息来扩展动态范围。

    Method and apparatus for image noise reduction using noise models
    98.
    发明申请
    Method and apparatus for image noise reduction using noise models 有权
    使用噪声模型降低图像噪声的方法和装置

    公开(公告)号:US20080056607A1

    公开(公告)日:2008-03-06

    申请号:US11512299

    申请日:2006-08-30

    申请人: Ilia Ovsiannikov

    发明人: Ilia Ovsiannikov

    IPC分类号: G06K9/40

    CPC分类号: H04N5/217 G06T5/002

    摘要: A method and apparatus for processing imager pixel signals to reduce noise. The processing includes receiving a target pixel signal, receiving at least one neighboring pixel signal, formulating a dynamic noise signal based at least in part on a value of the target pixel signal, and controlling a noise reduction operation using the dynamic noise signal.

    摘要翻译: 一种用于处理成像器像素信号以减少噪声的方法和装置。 所述处理包括:至少部分地基于所述目标像素信号的值接收目标像素信号,接收至少一个相邻像素信号,制定动态噪声信号,以及使用所述动态噪声信号来控制降噪操作。