https://wiki.greenstone.org/ 2026-04-05T18:28:56+00:00 https://wiki.greenstone.org/ https://wiki.greenstone.org/lib/exe/fetch.php?media=wiki:logo.png text/html 2023-03-13T01:46:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.greenstone.org/doku.php?id=legacy:manuals:en:paper:about_this_manual&rev=1678671991&do=diff About this manual This document explains how to create CD-ROM collections from paper documents. It describes in full detail the procedures and economics involved in the scanning and optical character recognition (OCR) processes, so that you end up with text in the right format to apply the Greenstone software. It also describes how to create and edit the material associated with a collection. text/html 2023-03-13T01:46:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.greenstone.org/doku.php?id=legacy:manuals:en:paper:creating_an_electronic_collection&rev=1678671991&do=diff Creating an electronic collection Three important aspects should be kept in mind when deciding to create digital collections. First, the collection must be organized. The more content there is, the greater the need for indexes and powerful search systems. For collections of 3000 to 5000 pages or more, indexes and search systems are essential. Second, the needs of end-users must prevail. The target groups that will use the collection should be identified, and a process of regular consultation se… text/html 2023-03-13T01:46:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.greenstone.org/doku.php?id=legacy:manuals:en:paper:introduction&rev=1678671991&do=diff Introduction One goal of the Greenstone Digital Library software is to empower organizations such as universities, United Nations agencies, non-governmental organizations, non-profit organizations and governments to create varied collections of information that can be delivered online or on CD-ROM. text/html 2023-03-13T01:46:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.greenstone.org/doku.php?id=legacy:manuals:en:paper:ocr&rev=1678671991&do=diff OCR: Optical Character Recognition An optical character recognition or OCR system transforms a scanned image into text. The input is a digitized image in TIFF or Bitmap format—preferably a clean, high-quality image. The output is a word-processor or web file, typically in RTF, Word, or text/html 2023-03-13T01:46:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.greenstone.org/doku.php?id=legacy:manuals:en:paper:scanners_and_scanning&rev=1678671991&do=diff Scanners and scanning The first step in converting paper documents into a digital library collection is to obtain images of all pages of all publications in digital format. The next stage is optical character recognition (OCR), and clean, high-quality images are essential for successful OCR. The digitization process requires a scanner capable of working at a resolution of 300 dpi (dots per inch). Most scanning can be done in black-and-white, but if color illustrations are included they must be … text/html 2023-03-13T01:46:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.greenstone.org/doku.php?id=legacy:manuals:en:paper:three_examples&rev=1678671991&do=diff Three examples: 1000 to 100,000 pages Typical small collection: 500 to 1000 pages Most NGOs have 500 to 1000 pages to scan. This volume can be OCRed in-house if motivated volunteers are available. Scanning The first step is to scan the publications to generate a high-quality TIFF file of each page, and a separate line-art, grey-scale or color bitmap image for each illustration. Assuming that 1000 pages have to be scanned, this might represent a part-time job of about one month—just for scann…