By succession, we can get the rough location of the ID number block according to the whole structure of ID card, and we can estimate if there are 18 numbers in the interesting region.

• 这样对整幅图像进行扫描之后，我们得到两条投影曲线，分别求取两条曲线的局部支集边界，就可确定出18个身份证号码的上下左右边界，下一步对界定的数字图像分别进行处理识别。