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    • 1. 发明授权
    • Image processing device and image processing method
    • 图像处理装置及图像处理方法
    • US08223392B2
    • 2012-07-17
    • US10377701
    • 2003-03-04
    • Atsushi Yokochi
    • Atsushi Yokochi
    • H04N1/046G06F15/00G06K7/001
    • H04N1/4092H04N1/56
    • According to a fine line detection processing, when for a subject pixel to be subjected to the fine line detection processing, a 3×3 matrix area centered on this subject pixel is set as a subject area. Point values “0” to “8” are assigned to the matrix elements constituting this 3×3 matrix subject area. Then, three pixels with the first, second, and third lowest brightness values are extracted from the subject area. When the total point value of the three extracted pixels is equal to “12”, the extracted pixels are determined as being in a connected state. Then, an intermediate value is calculated from the minimum and maximum values of brightness (Y) of pixels in the subject area. When the number of pixels with a brightness (Y) value smaller than the intermediate value is less than 4, the subject pixel is determined as being a fine-line pixel. A fine-line code is added to the subject pixel that is determined as being a fine-line pixel. By the fine line detection processing, even a one-dot fine line, which is difficult to detect during the edge part detection, can be detected with certitude.
    • 根据细线检测处理,当对于被摄体像素进行细线检测处理时,将以该被摄体像素为中心的3×3矩阵区域设定为被摄体区域。 点值“0”至“8”被分配给构成该3×3矩阵主题区域的矩阵元素。 然后,从对象区域提取具有第一,第二和第三最低亮度值的三个像素。 当三个提取的像素的总点值等于“12”时,提取的像素被确定为处于连接状态。 然后,根据被摄体区域中的像素的亮度(Y)的最小值和最大值来计算中间值。 当亮度(Y)值小于中间值的像素数小于4时,将被摄体像素确定为细线像素。 将细线代码添加到被确定为细线像素的对象像素。 通过细线检测处理,即使在边缘部分检测期间难以检测的单点细线也能够被认可。