Open wong00 opened 1 year ago
3DDFA得到偏移量和缩放因子的代码如下:
def P2sRt(P):
""" decompositing camera matrix P.
Args:
P: (3, 4). Affine Camera Matrix.
Returns:
s: scale factor.
R: (3, 3). rotation matrix.
t2d: (2,). 2d translation.
"""
t3d = P[:, 3]
R1 = P[0:1, :3]
R2 = P[1:2, :3]
s = (np.linalg.norm(R1) + np.linalg.norm(R2)) / 2.0
r1 = R1 / np.linalg.norm(R1)
r2 = R2 / np.linalg.norm(R2)
r3 = np.cross(r1, r2)
R = np.concatenate((r1, r2, r3), 0)
return s, R, t3d
在本项目中,将DECA的输出的headpose经过预定义的scale_transform等参数进行变换,从而对应于face2face的输入;
那么当我使用3DDFA模型时,输出得到的偏移量和缩放因子该如何变换,才能对应face2face的输入呢?