Fig. 7
From: Blind data hiding technique using the Fresnelet transform
We use the four benchmark images: “red asterisk” Cameram; “open circle” Peppers; “pink triangle” Elaine; “unfilled blue square with middle dot” Lena. Simulation results with various scaling factors: \( \alpha = 0.03 \), \( 0.04 \), \( 0.05 \), \( 0.06 \), \( 0.07 \). For the test cover image data. In the first row, the left plot shows the quality (PSNR) of the information embedded images corresponding benchmark images after embedding the USAF. Similarly, the right plot is for the case of DDNT. In the second row, the left plot shows the CC values of extracted USAF information data from the information embedded images above. Similarly, the right plot is for the case of DDNT