A Robust Coverless Image Steganography Algorithm Based on Image Retrieval with SURF Features

<div>Some samples of attacked images in holidays: (a) JPEG compression: <i>Q</i> = 90, (b) Gauss noise: <i>μ</i> = 0 and <i>σ</i> = 0.001, (c) salt and pepper noise: <i>μ</i> = 0 and <i>σ</i> = 0.001, (d) Speckle noise: <i>μ</i> = 0 and <i>σ</i> = 0.01, (e) Gauss low-pass filtering: 3 × 3, (f) mean filtering: 3×3, (g) median filtering: 3 × 3, (h) centered cropping: 20%, (i) edge cropping: 10%, (j) rotation: 10°, (k) translation: (16, 10), (l) scaling: 1.5, (m) color histogram equalization, and (n) gamma correction:0.8.</div>

Security and Communication Networks

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Figure 9

Figure 9: A Robust Coverless Image Steganography Algorithm Based on Image Retrieval with SURF Features 