A Modification-Free Steganography Method Based on Image Information Entropy

Figure 6

Different angle rotation of the original secret image. (a) Original secret image. (b) Rotation of 90 degrees anti-counterclockwise of the original secret image. (c) The original secret image horizontally mirrored and vertically mirrored. (d) Rotation of 270 degrees anti-counterclockwise of the original secret image. (e) The original secret image horizontally mirrored. (f) Rotation of 90 degrees anti-counterclockwise and the original secret image vertically mirrored. (g) The original secret image vertically mirrored. (h) Rotation of 270 degrees anti-counterclockwise and the original secret image vertically mirrored.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)