：针对字符号码类目标，提出一种无需全图阈值分割和先验特征匹配计算的方法。先利用

方向梯度块精确定位目标，再对目标区域作局部阈值分割，从而快速地得到高质量的目标信息。-: Number of classes for the characters, we put forward a complete map without a priori segmentation and feature matching calculation. Gradient direction of the first block using precision targeting, and then the target area for the local threshold segmentation, to quickly get high-quality target information.