Visual Cryptography is an art to secure the data using N-shares scheme. If we want to increase the security of data then we have to increase the number of shares. As it is a mechanical scheme then the output noise is directly proportional to the number of shares. In my question, "quality" means the noise less data as an output.
Thanks for your valuable advice.
Which combination should be used and if you have any research paper then kindly share.
now a days divide the pixel and reconstruct that pixels is very popular in VC. because halftone always produce poor quality. but pixel divide process reconstruction same as original image with better quality. to know simple pixel division and create share to refer my elsevier paper
http://www.sciencedirect.com/science/article/pii/S1877050915032445
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