Comparative Study Of Error Diffusion Algorithms With Raster Scan

  Kanchan Thakur,  Pratibha Sharma

Visual cryptography is a secret sharing scheme which uses images distributed as shares such that, when the shares are superimposed, a hidden secret image is revealed. Color visual cryptography encrypts a color secret image into n halftoned image shares. The secret image can be recovered simply by stacking these shares together without any complex computations involved. The shares are very safe because separately they reveal nothing about the secret image. Halftoning is the key feature of visual cryptography which provides security at the early stage of cryptography. A particular halftoning method that has been used extensively in visual cryptography scheme is so called error diffusion method. This method provides a simple and efficient algorithm for halftoning. Error diffusion algorithm has attracted much attention in the graphics community. We will make a review of error diffusion halftoning techniques that are used in visual cryptography scheme. A halftoning toolbox is used that will help us in generating halftoned shares and values for parameters like PSNR, WSNR, LDM, UQI .The one with more accuracy and good output will be considered as the best error diffusion algorithm. To enhance the quality of decoded image, XOR operation will be used.

Keywords- Halftone, Floyd, Stuckie, Jarvis, Error Diffusion, Raster Scan, PSNR, WSNR, LDM, UQI.

Unique Identification Number - IJEDR1802146
Page Number(s) - 790-794
Pubished in - Volume 6 | Issue 2 | June 2018
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  Kanchan Thakur,  Pratibha Sharma,   "Comparative Study Of Error Diffusion Algorithms With Raster Scan", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.6, Issue 2, pp.790-794, June 2018, Available at :http://www.ijedr.org/papers/IJEDR1802146.pdf