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    Weighted gradient based and color corrected interpolation
    3.
    发明授权
    Weighted gradient based and color corrected interpolation 有权

    公开(公告)号：US07256828B2

    公开(公告)日：2007-08-14

    申请号：US10347984

    申请日：2003-01-21

    申请人： Andreas Nilsson ,  Pierre Nordblom

    发明人： Andreas Nilsson ,  Pierre Nordblom

    IPC分类号： H04N3/14 ,  H04N5/335 ,  H04N9/83 ,  H04N9/68 ,  H04N1/47 ,  G06K9/00

    CPC分类号： G06T3/4015 ,  G06T3/4007 ,  H04N9/045

    摘要： The apparatus and method invented are operating upon a digital image signal obtained from an image sensor. The sensor is covered with different colored filters and is only able to record the color transmitted through each specific filter into the photosite or pixel. This type of sensor is known as a color filter array or CFA sensor. The different colored filters are arranged in a predefined pattern across the sensor. To obtain a full color image the missing color information is estimated by a set of weighed values obtained by an inverted gradient function. The set of weighted values is found from the neighboring pixels in the four compass directions, north, east, west and south or is found horizontally and vertically. The surrounding pixels are corrected by the chrominance channel to better fit the center pixel in the luminance channel, prior to using the gradient functions. The chrominance channel is interpolated in a similar manner and is also corrected to better fit the center pixel before the inverted gradient functions are applied.

    Weighted gradient based and color corrected interpolation
    4.
    发明申请
    Weighted gradient based and color corrected interpolation 审中-公开
    加权梯度和色彩校正插值

    公开(公告)号：US20070292022A1

    公开(公告)日：2007-12-20

    申请号：US11891823

    申请日：2007-08-13

    申请人： Andreas Nilsson ,  Pierre Nordblom

    发明人： Andreas Nilsson ,  Pierre Nordblom

    IPC分类号： G06K9/00

    CPC分类号： G06T3/4015

    摘要： The apparatus and method invented are operating upon a digital image signal obtained from an image sensor. The sensor is covered with different colored filters and is only able to record the color transmitted through each specific filter into the photosite or pixel. This type of sensor is known as a color filter array or CFA sensor. The different colored filters are arranged in a predefined pattern across the sensor. To obtain a full color image the missing color information is estimated by a set of weighed values obtained by an inverted gradient function. The set of weighted values is found from the neighboring pixels in the four compass directions, north, east, west and south or is found horizontally and vertically. The surrounding pixels are corrected by the chrominance channel to better fit the center pixel in the luminance channel, prior to using the gradient functions. The chrominance channel is interpolated in a similar manner and is also corrected to better fit the center pixel before the inverted gradient functions are applied.

    摘要翻译： 所发明的装置和方法是根据从图像传感器获得的数字图像信号进行操作的。 传感器被不同的彩色滤光片覆盖，只能将通过每个特定滤光片传输的颜色记录到光子或像素中。 这种类型的传感器被称为滤色器阵列或CFA传感器。 不同的彩色滤光片以预定图案布置在传感器上。 为了获得全色图像，通过由反向梯度函数获得的一组加权值来估计缺失的颜色信息。 从四个罗盘方向（北，东，西，南）的相邻像素中可以发现一组加权值，或者水平和垂直地找到。 在使用梯度函数之前，通过色度通道校正周围像素以更好地拟合亮度通道中的中心像素。 色度通道以相似的方式进行内插，并且在应用反向梯度函数之前也被校正以更好地适合中心像素。