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A planetary scanner (also called an orbital scanner) is a type of image scanner for making scans of rare books and other easily damaged documents. In essence, such a scanner is a mounted camera taking photos of a well-lit environment. Originally, such scanners were expensive and could only be found in archives and museums, but with the availability of cheap, high-resolution digital cameras, DIY planetary scanners have become affordable, and for instance are being used by volunteer scan providers for Project Gutenberg.

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  • A planetary scanner (also called an orbital scanner) is a type of image scanner for making scans of rare books and other easily damaged documents. In essence, such a scanner is a mounted camera taking photos of a well-lit environment. Originally, such scanners were expensive and could only be found in archives and museums, but with the availability of cheap, high-resolution digital cameras, DIY planetary scanners have become affordable, and for instance are being used by volunteer scan providers for Project Gutenberg. Flatbed scanners often come in contact with at least part of the object to be scanned. They also require books to be fully opened most of the time (there are some exceptions where the scanning surface ends at the edge of the flatbed scanner, so that a book can be opened partially). Both practices can damage rare books; For example, opening a book 180 degrees can be damaging to its spine. These scanners are also implemented to scan other fragile documents such as old maps. However, planetary scanners that allow the book to open to a full 180 degrees have special features that protect the book binding from being damaged. Many of those scanners are equipped with self-balancing book cradles, gaps for the binding to be placed in, and pressure-sensitive glass controls. It is argued that by opening the book to a full 180 degrees and using scan glass, the scanner is able to capture further into the binding than those using a V cradle. Planetary scanners tend to touch fewer parts of a book, and provide an option of only opening a book partially. (en)
  • Lo scanner planetario è un tipo di scanner ottico usato per effettuare scansioni di libri rari e altri documenti facilmente danneggiabili. Esso si avvale di una fotocamera che fotografa un piano ben illuminato. Originariamente questo tipo di scanner era molto costoso e poteva essere utilizzato solo in archivi e musei, ma con l'avvento di fotocamere digitali ad alta risoluzione più economiche, gli scanner planetari sono diventati molto diffusi e sono oggi usati, per esempio, anche dai volontari che partecipano al Progetto Gutenberg. Esempio di scanner planetario Gli scanner lineari devono venire in contatto con l'oggetto da scansionare. Essi richiedono inoltre che, per tutta la durata dell'operazione, il libro sia completamente aperto. Tuttavia l'apertura di un volume a 180 gradi può danneggiarne la legatura. Questi scanner sono stati implementati per scansionare altri tipi di documenti fragili, come le mappe antiche. Tuttavia gli scanner planetari che richiedono l'apertura del testo da digitalizzare a 180 gradi, hanno delle caratteristiche che permettono di proteggere la rilegatura da possibili danni. Molti scanner sono dotati di piani basculanti, intercapedini in cui poggiare le legature e sensori che permettono ai vetri di effettuare una pressione controllata. Si sostiene che aprendo il volume da scansionare a 180 gradi e usando un vetro, lo scanner sia capace di catturare maggiori dettagli rispetto ad una apertura a V. Gli scanner planetari permettono di maneggiare porzioni limitate del volume e forniscono un'alternativa all'apertura totale del libro. (it)
  • Планета́рный ска́нер (англ. planetary scanner) — разновидность сканера изображений, использующаяся для сканирования книг и сброшюрованных документов. Планетарные сканеры широко используются для оцифровки оригиналов, требующих деликатного обращения (ветхих, исторических документов). Часто используется название «книжный сканер». (ru)
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  • Планета́рный ска́нер (англ. planetary scanner) — разновидность сканера изображений, использующаяся для сканирования книг и сброшюрованных документов. Планетарные сканеры широко используются для оцифровки оригиналов, требующих деликатного обращения (ветхих, исторических документов). Часто используется название «книжный сканер». (ru)
  • A planetary scanner (also called an orbital scanner) is a type of image scanner for making scans of rare books and other easily damaged documents. In essence, such a scanner is a mounted camera taking photos of a well-lit environment. Originally, such scanners were expensive and could only be found in archives and museums, but with the availability of cheap, high-resolution digital cameras, DIY planetary scanners have become affordable, and for instance are being used by volunteer scan providers for Project Gutenberg. (en)
  • Lo scanner planetario è un tipo di scanner ottico usato per effettuare scansioni di libri rari e altri documenti facilmente danneggiabili. Esso si avvale di una fotocamera che fotografa un piano ben illuminato. Originariamente questo tipo di scanner era molto costoso e poteva essere utilizzato solo in archivi e musei, ma con l'avvento di fotocamere digitali ad alta risoluzione più economiche, gli scanner planetari sono diventati molto diffusi e sono oggi usati, per esempio, anche dai volontari che partecipano al Progetto Gutenberg. Esempio di scanner planetario (it)
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  • Scanner planetario (it)
  • Planetary scanner (en)
  • Планетарный сканер (ru)
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