A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2017; you can also visit the original URL.
The file type is
The lightness values of white papers cover an approximate range of fifteen jnd. The tone range of scanners is adjusted for the lightest possible substrate. Therefore, a scan is usually preceded by a preview operation in which the image is subsampled and the data is analyzed to determine the actual tone range. In color facsimile and sheet-fed scanners that do not buffer the entire image, such an operation is not possible. We present a technique in which statistical methods are used to estimatedoi:10.1117/12.271623 dblp:conf/clrimg/Beretta97 fatcat:2isdvf5hgnaabo3kcb476lfqi4