driving licence recognition using Tesseract-OCR 4.0 image_preprocess.cpp程序功能是:利用opencv自带函数,对采集到的驾驶证图片提取外边缘轮廓,并通过仿射变换进行校正,然后调整为统一大小,选取身份证号等对应内容的位置进行切割,之后再用Tesseract-OCR对切割出来的内容进行识别
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