图像梯度方向应用干旋转不变性模板匹配时存在计算量较大的问题，由此提出一种改进的基于梯度方向码的旋转不变模板匹配

方法，通过计算积分直方图降低统计直方图的计算填，采用像素跳跃的匹配方法减少大量无效的匹配运算。实验结果表明，该方法在保证

匹配准确性的前提下，匹配速度提高了3倍至6倍，可以达到实时性要求。-it uses integral histogram to reduce the

computing COSTS of computer histograms，and uses pixel-jump method to reduce a lot of ineffective matching operalions．Experimental result shows

that the method Can speed up from 3 to 6 times in the premise of ensuring matching accuracy，SO it Can meet real-time requirement．