Fig. 4From: Efficient cover image selection based on spatial block analysis and DCT embeddinga PSNR before and after embedding in the DCT domain for the cases with and without manipulations using image local blocks, (b) the secret image, 32 × 32, (c) an example of a cover image, (d) a part of the cover image and (e) the same part of the image after spatial embedding without local block manipulations, and (f) with local block manipulationBack to article page