03-09-2010, 03:19 AM
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#1 |
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Connoisseur
 
Posts: 95
Karma: 388
Join Date: Jan 2010
Device: Nook,Nook Simple Touch, Nook Color
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What does Grey Level(Scale) mean
Hi All
I'm just bought Nook, which on the wiki says it has 16bit grey levels. https://wiki.mobileread.com/wiki/Nook I put some image pdf into it, and found that the images have very obvious boards between the colours. Which looks like this image: http://en.wikipedia.org/wiki/File:Pa...me_palette.png If the Grey level for ebook device is the same definition as the wiki http://en.wikipedia.org/wiki/Grayscale 16bit should be enough for a picture, or 16 level means 4bit (16 levels of grey)? Cheers |
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03-09-2010, 03:29 AM
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#2 |
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Groupie
 
Posts: 185
Karma: 119824
Join Date: Feb 2008
Device: iLiad, DR1000S, HTC Hero, DR800SG
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it just says 16 levels of grey, not 16 bit. 16 levels of grey are enough to display pictures if properly dithered.
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03-09-2010, 06:34 AM
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#3 |
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reader
Posts: 6,975
Karma: 5183568
Join Date: Mar 2006
Location: Mississippi, USA
Device: Kindle 3, Kobo Glo HD
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For a good example of what can happen with gray scales, see More display issues on the DR. It sounds like the Nook might not be doing any dithering, which is marginally acceptable with 16 gray levels.
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03-10-2010, 03:52 AM
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#4 | |
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achutney
Posts: 1
Karma: 10
Join Date: Mar 2010
Location: Bangalore
Device: Kindle
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Quote:
It is actually 16 levels of Gray (4 bit). Typically, Text is displayed using 4 levels of gray. Menu items & icons using 8 levels of gray. Images are displayed using 16 levels of gray. I have posted an image here... (http://www.flickr.com/photos/8788289@N08/4422160802/)  best wishes aPpLe ChUtNeY. |
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03-12-2010, 06:15 PM
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#5 |
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Connoisseur
Posts: 95
Karma: 388
Join Date: Jan 2010
Device: Nook,Nook Simple Touch, Nook Color
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Thank you guys~~
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03-12-2010, 08:32 PM
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#6 |
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Explorer
Posts: 218
Karma: 48926
Join Date: Feb 2009
Location: Berkeley, Califorina
Device: Kindles,SurfacePro2,NookColor,Pocket Edge,Samsung 10.1 Tab,S2 phone
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I did a blog article on this when the Kindle first went to the 16 levels of gray and what that meant vs 4 and 8 levels as far as potential.
It's at http://bit.ly/4vs16grays |
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