To test the robustness of the robust watermark to Gaussian
noise, we conducted the experiment starting from Gaussian
noise with variance 0.001 to 0.015. As results, we were able to
extract the perfect recovery of robust QR code.
Experimental results that the proposed method is effective.
The quality of the QR code can be gauged on the basis of the
peak signal to noise ratio (PSNR). In general, the larger PSNR
value and the smaller average bit error rate (BER) value
indicate that the smaller visual distortion and the smaller
extraction errors are produced when applying compression
attacks to watermarked images.