Tire surface optical character recognition preprocessing method and device

The invention discloses a tire surface optical character recognition preprocessing method and device. The method comprises the steps that the physical size and picture of a to-be-detected tire are obtained; determining the pixel size of the to-be-measured tire according to the physical size of the to-be-measured tire and a transfer function obtained through a calibration process; and according to the pixel size of the to-be-detected tire, converting the image of the to-be-detected tire into a tire image for character recognition. By utilizing the method and the device, the tire picture can be simply and efficiently converted into the tire picture in which the characters are arranged in the horizontal row, and the characters on the tire can be conveniently and subsequently recognized. 本发明公开一种轮胎表面光学字符识别预处理方法及装置，该方法包括：获得待测轮胎的物理尺寸及图片；根据所述待测轮胎的物理尺寸及通过标定过程得到的转换函数确定所述待测轮胎的像素尺寸；根据所述待测轮胎的像素尺寸，将所述待测轮胎的图片转换为用于字符识别的轮胎图片。利用本发明，可以简单、高效地将轮胎图片转换为横排文字排列的轮胎图片，方便后续对轮胎上文字的识别。