1) radius-angle histogram
径向夹角直方图
2) radial histogram
径向直方图
3) angular histogram
方向角直方图
4) normal angle histogram
法向角直方图
1.
A new image registration algorithm is presented based on contour-feature, which involves extracting the contour of the image, calculating the normal angle of each contour point and proceeding normal angle histogram statistics, then estimating quickly the rotation angle between two images by circular correlation of normal angle histograms.
提出了一种新的基于轮廓特征的图像配准算法,首先提取图像轮廓并计算每个轮廓点的法向角,然后对轮廓点法向角进行直方图统计,通过对两幅图像的轮廓点法向角直方图进行圆周相关计算便可快速估计出两幅图像所存在的旋转角度。
5) orient diameter
方向直径
6) Directional Gradient Angular Histogram
方向梯度相角直方图
1.
Wavelet Domain Image Indexing Using Directional Gradient Angular Histogram;
小波变换域内基于方向梯度相角直方图的图像检索算法
补充资料：夹角
1.两条线(直线或曲线)所夹的角。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条