Secure and Efficient Image Transmission Scheme for Smart Cities Using Sparse Signal Transformation and Parallel Compressive Sensing

Figure 9

Robustness against occlusion analysis: the first column to the fifth column in (a) are sequentially the cipher images with occlusion in the upper left corner, the bottom left corner, the upper right corner, the bottom right corner, and the central directions, respectively; (b) the decrypted images corresponding to (a).

(a)

(b)