@incollection{furht_halftoning_2008,
	title = {Halftoning {Based} {Visual} {Secret} {Sharing} ({Vss})},
	copyright = {©2008 Springer-Verlag},
	isbn = {978-0-387-74724-8 978-0-387-78414-4},
	url = {http://link.springer.com/referenceworkentry/10.1007/978-0-387-78414-4_330},
	abstract = {DefinitionIn Visual Secret Sharing based on halftoning, the continuous-tone image is first transformed into a halftone image, and then the VSS is applied.Since VSS-schemes require binary inputs [1, 2], the continuous-tone image is first transformed into a halftone image using the density of the net dots to simulate the intensity levels [3]. In the sequence, the halftone version of the secret image is encrypted into the n shares using the conventional (k, n) visual cryptography based encryption process. The secret image is visually revealed if at least k shares are available for decryption and stacked together on an overhead projector or specialized display.Due to the nature of visual cryptography, and the expansion and contrast properties of (k,n)-VSS schemes, both binary (conventional) and halftoning-based VSS schemes usually produce shares and decrypted images with expanded dimensions compared to those of the original input (secret) image. In addition, VSS schemes introduce ...},
	language = {en},
	urldate = {2016-05-03},
	booktitle = {Encyclopedia of {Multimedia}},
	publisher = {Springer US},
	editor = {Furht, Borko},
	year = {2008},
	note = {00000},
	pages = {277--277}
}

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