Analysis of Digital Image Watermarking Techniques through Hybrid Methods

Table 2

Evaluation performance of the watermarked image.

Schemes	Test image	Imperceptibility measured in PSNR (dB) (without any deformation of watermarked image)
DWT-DCT [3]	Lena	37.7160
DWT-SVD [4]	Lena	109.84
DWT-SVD [5]	Cameraman	64.3155
LWT-DCT [6]	Lena	46.7629
DWT-DCT [8]	MRI-brain	52.743550 (for gain factor, k = 0.02)
DCT-DWT [9]	Peppers	42.74
DWT-DCT-SVD [12]	Abdominal	57.80 ((for gain factor, k = 0.1)
LWT-DCT-SVD [13]	Lena	46.5085
DCT-SVD [14]	Barbara	62.74
DFT-DCT [15]	Mandrill and D9	61.28 (for Mandrill), 58.97 (for D9 image)
DCT-DWT [17]	Baboon	>35