偏转角

• For gaining good experimental results , there are the requirements for the experimental images : the size of each image is at least 320pixel 240pixel , the area of each face in every image is at least 60pixel 60pixel , the angle of human face apart from uprightness should be less than 30 degrees
  为了得到较好的实验效果,本文对于实验中的图像有以下要求:图像大小至少为320像素240像素,单个人脸区域面积至少为60像素60像素,人脸在垂直方向的偏转角不得大于30度。