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在图像分析中,水平积分投影和垂直积分投影被用来描述目标的灰度分布结构,其缺点是很难用简单的关系将旋转前后的积分投影后的曲线与相同的目标对应起来。因此,提出基于圆周投影的圆周积分投影和圆周梯度积分投影两种图像灰度分布的统计方法。与水平积分投影和垂直积分投影方法进行了比较。实验结果表明,圆周积分投影和圆周梯度积分投影曲线具有良好的旋转和尺度不变性。
In the image analysis, the horizontal integral projection and the vertical integral projection are used to describe the gray distribution structure of the target. The disadvantage of this method is that it is difficult to correspond the same target with the projected curve of the integral before and after rotation in a simple relationship. Therefore, a statistical method of gray distribution of two kinds of images based on the circumferential projection and the circular gradient integral projection is proposed. Compared with the horizontal integral projection and the vertical integral projection method. The experimental results show that the integral curves of the circular integral projection and the circular integral gradient have good rotation and scale invariance.