各类车牌测试样本，港澳进出大陆车牌，教练车牌，警车车牌，普通车牌，普通蓝牌，使馆车牌，新式军车车牌，武警车牌-Test samples of various types of license plates, and out of mainland China, Hong Kong license plates, license plate coaches, police license plates, common license plates, common blue card, embass

运用霍夫变换，检测图片中的直线，本程序主要检测车牌中的直线-Using the Hough transform to detect straight lines in the picture, this program is mainly to detect license plates in a straight line