对信号点不加处理，灰度值不变。
用图像分析仪分别测各组阳性信号的灰度值作定量分析。
Image analytic system was used to detect the gray degree values of the positive signals.
其关键步骤包括：图象滤波，图象灰度信息提取，微阵列间距确定，靶点定位和靶点信号值计算。
This algorithm includes image filtering, extracting gray information, determining microarray spacing, addressing of spots and calculating brightness property from spots.
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