Translations:Kwaliteitsvol digitaliseren van tekst- en beeldmateriaal/35/en

• Scan the entire document, leaving a margin of approximately 0.5 cm around the edge to prove that the full document has been digitised. You can always remove the margin again later, e.g. for publication.
• The image must have a resolution of minimum 300 ppi at full size (ppi stands for ‘pixels per inch’). This means that 300 pixels are recorded for every inch of your document. The more pixels there are, the sharper the image is and the more you can zoom in without losing quality. If you’re digitising documents that you know it must be possible to magnify (e.g. passport photos and slides), the standard value of 300 ppi is not sufficient. If you want to magnify the document 2x as standard, choose 600 ppi. And use 1200 ppi to zoom in 4x, and so on.
• If you’re scanning or taking photographs in colour, choose a bit depth of 24 bit. This is the number of bits (zeros and ones) used to register the colour per pixel. The greater the bit depth, the greater the range of colours that can be saved.
• If you’re scanning or taking photographs in grey tones, choose a bit depth of 8 or 16 bit.
• Make sure the colours are captured and saved using a sufficiently rich colour profile. An RGB colours profile is usual for digitisation projects. The world of heritage mostly opts for the colour profiles ECI RGB v2 or Adobe RGB. Another common colour profile is sRGB. But do not use this for your archive or master files (see below) as the range of colours that sRGB can save is not rich enough.