【摘要】 图像局部变形是指仅在图像的一小部分区域内做变形,改变某些局部范围的特征,同时保持其它区域不发生变化。目前常用的图像变形方法基本上考虑的是图像的整体变形,在直接运用于局部变形时效果不佳。文章提出了一种人脸图像局部变形方法,它首先在局部变形区域内确定特征点和影响半径,然后计算出区域像素点几何位置的变化,最后使用双线性插值原理进行灰度赋值。该方法可以获得很好的人脸局部变形效果,具有连续性好、算法简洁、实时互动等优点,在人脸识别领域有可观的应用前景。更多还原

【Abstract】 This paper proposes an algorithm of face image warping based on local constraints.This method firstly specifies a limited number of feature points as the center of deformation,then finds their locations in transformed image and calculates their influencing radiuses respectively,after then calculates the geometric transformation of pixels within influencing areas according to local warping formula,finally calculates pixel gray values by means of bi -linear interpolation.Experimental results show that this approach is flexible,simple,fast and efficient.更多还原