BibTeX:

@article{IJIRSTV2I12174,
     title={Visual Cryptographic Scheme for Color Images Using Threshold Level Determination },
     author={K. Chitra and Dr. V. Prasanna Venkatesan},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={2},
     number={12},
     pages={406--409},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV2I12174.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

Visual cryptography is one of the cryptographic techniques which divide the original image (or) data into ’n’ number of shares. Each share contains a part of original information, for the reconstruction process ‘k’ number of shares is required to reconstruct the data. Here we propose the visual cryptographic scheme for color images using threshold level determination. If the threshold level is higher in particular pixel for the particular color that pixel gains the transparency value (white shares) and the remaining other colors having black pixel values. The proposed method satisfy the visual cryptographic properties such as there will be no pixel expansion, it requires only few shares to reconstruct the image, there will be no lose in the data share.

Visual Cryptography, Dithering, Secret Sharing, Primitive Color Additive Model