Comparison of various Error Diffusion Algorithms Used in Visual Cryptography with Raster scan

  Digvijay Singh,  Pratibha Sharma

Visual Cryptography is a cryptographic technique which allows optical information to be encrypted .Visual Cryptography encrypt secret image into n halftoned shares. The secret image can be recovered by stacking these shares together without any complex computation involved. These shares are very safe because individually they show nothing about the secret image. A particular halftoning method named as error diffusion method is used for the better generation of halftoned shares. Error diffusion algorithms have attracted much attention in the image processing. In this paper three error diffusion algorithms are used for generation of halftoned shares of secret image and these algorithms are compared on the basis of four parameters such as PSNR, WSNR, LDM, and UQI.

Keywords- Error Diffusion, Half toning, Raster scan, PSNR, WSNR, LDM, UQI.

Unique Identification Number - IJEDR1702301
Page Number(s) - 1939-1944
Pubished in - Volume 5 | Issue 2 | June 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Digvijay Singh,  Pratibha Sharma,   "Comparison of various Error Diffusion Algorithms Used in Visual Cryptography with Raster scan", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 2, pp.1939-1944, June 2017, Available at :http://www.ijedr.org/papers/IJEDR1702301.pdf