open cv 识别人脸出错 cv2.error: OpenCV(4.0.0) error: (-49:Unknown error code -49) Input file is empty in f
2019-02-09 15:10
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用HAAR分类器识别人脸，屡次出错。
其中出错的语句在于：
face_cascade = cv2.CascadeClassifier(’/home/liuyu/PycharmProjects/faceRecognition-master/haarcascade_frontalfacte_defaul.xml’)
出错信息：
cv2.error: OpenCV(4.0.0) /io/opencv/modules/core/src/persistence.cpp:722: error: (-49:Unknown error code -49) Input file is empty in function ‘open’
开始以为是语句错了，调试了很久才发现是haarcascade_frontalfacte_defaul.xml 的库下载方式不对，所以下载的分类器使用中不识别。 后来干脆到github上打开该文件，粘贴到TXT在另存为 haarcascade_frontalfacte_defaul.xml 再使用， 解决问题。
分类器下载地址：
https://github.com/opencv/opencv/tree/master/data/haarcascades
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