Is a number, the pixel location of the left edge of the window.
是一个数字，指示了窗口的左侧的位置。
Is a number, the pixel location of the right edge of the window.
是一个数字，指示了窗口的右侧的位置。
Is a number, the pixel location of the bottom edge of the window.
是一个数字，指示了窗口的下沿的位置。
Is a number, the pixel location of the top edge of the window.
是一个数字，指示了窗口的上沿的位置。
Image edge is detected by the third central moment of its immediate pixel neighborhood.
利用像素邻域的三阶中心矩，可以提取图像边界。
Image edge is detected by the third central moment of its immediate pixel neighborhood.
利用像素邻域的三阶中心矩，可以提取图像边界。
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