English: Illustration of a digital image, obtained when an original, consisting of a central dark region with the brightness increasing towards the periphery, is digitised with N=8 and G=4 (i.e. m=2).
Reproduced with permission from Heggie JCP, Liddell NA & Maher KP, 2001, Applied Imaging Technology, 4th Edition
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{{Information |Description ={{en|1=Illustration of a digital image, obtained when an original, consisting of a central dark region with the brightness increasing towards the periphery, is digitised with N=8 and G=4 (i.e. m=2).}} |Source ={{own}