• 图形图像处理(Graphics and image processi • 上一篇 下一篇
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摘要： 以图像Harr-like矩形特征为原型，提出了一种新的基于图像灰度信息的区域特征--扇形特征及其提取方法。以圆的旋转不变特性为基础，在极坐标下将图像分割为不同的扇形(段)子块，并将各子块区域灰度和作为表示扇形子块的特征，然后对子块特征集进行归一化，所得的归一化扇形特征集作为特征选取的空间。将该特征提取方法应用到人脸识别系统中，与传统方法的比较实验表明扇形特征具有较好的识别效果，且对图像平移、旋转、缩放和噪声干扰均具有较好的鲁棒性。
