Invertible secret image sharing for gray level and dithered cover images

► Enhanced the quality of stego images regardless of intensity range of cover image. ► Provides 4 dB and 7 dB increase on stego image quality compared to other studies. ► Stego images have also higher PSNR (43 dB) for binary level cover images. ► EMD ensures the quality of stego images independent from the intensity ranges. ► Utilized modulus operation ensures the reversible capability to the method.