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Plain and encrypted histogram of pepper image (512 × 512); (a–c) Plain histograms for three grey channels of pepper image. (d–f) Shuffled histograms for three grey channels of pepper image. (g–i) Encrypted three channels of pepper image using Julia fractals. (j–l) Final histograms of three channels using 3D Lorenz chaotic maps. (m,n) Final histogram of combined three channels for the pepper test image.
