Digital watermarking technique for projective-distorted images using collinear points. - Natapon Pantuwong; Wiyada Yawai; Nopporn Chotikakamthorn (EUSIPCO, 2005)

Projective-invariant digital image watermarking technique using four co-planar feature points. - Nopporn Chotikakamthorn; Natapon Pantuwong; Wiyada Yawai (ICIP (1), 2005)