Figure 3From: Logistic Map-Based Fragile Watermarking for Pixel Level Tamper Detection and ResistanceSimulation results. (a) Original "Biltmore Estate" image of size 2 256 × 256 pixels, (b) tamper data and their locations, (c) proposed watermark and tampered data-PSNR = 38.30 dB, (d) Zhang-Wang watermark and tampered data-PSNR = 37.97, (e) tampered pixels detected by AgTDM, and (f) tampered pixels detected by ZW approach.Back to article page