Description:
There are two types of scanning – bitonal or grey scale. It is fairly important for any publication to use one of these methods for consistency, although it is possible to scan a book that has the occasional photograph or lithographic illustration as bitonal with interspersed grey scale scans.
Either type can be used with optical character recognition (OCR) if required.
(Subject to a satisfactory original document or book).
Creation of PDF files (for Adobe Acrobat)
It is possible to convert the TIFF image files to PDF format for use with Adobe Acrobat. This includes:
- creation of page numbered bookmarks for the whole document
- supply of the PDF file(s) on CD
Either type can be used with optical character recognition (OCR) if required.
(Subject to a satisfactory original document or book).
Creation of PDF files (for Adobe Acrobat)
It is possible to convert the TIFF image files to PDF format for use with Adobe Acrobat. This includes:
- creation of page numbered bookmarks for the whole document
- supply of the PDF file(s) on CD
Details:
| Bitonal scanning | This is simple black and white and is ideal for most printed books, including those with illustrations that are line engravings. An exception might be an old printed book that is very inconsistent in print density, i.e. a mixture of grey and black. The end result graphics files are much smaller than grey scale scans, and therefore more images can be stored on a CD either as graphics files or PDF files. |
| Grey scale scanning | Grey scale scanning is ideal for documents or books that contain: - hand written pages-photographs - lithographs Hand written documents can sometimes be scanned as bitonal, but the ink density needs to be very good, and very consistent. Images scanned in grey scale can result in very large file sizes, and therefore fewer images can be stored on a single CD. Typically about 500 pages, either as TIFF files or PDF files fit on a CD. |
| Paper Size | A2 / A3 / A4 |
| Dpi Resolution | 75 / 150 / 200 / 300 / 600 / 1200 |
| Scanning Format | Tiff (CCITT G4) Black & White format |
| Misc | PDF Image |
| Misc | DjVu |