|03-09-2010, 03:19 AM||#1|
Join Date: Jan 2010
Device: Nook,Nook Simple Touch, Nook Color
What does Grey Level(Scale) mean
I'm just bought Nook, which on the wiki says it has 16bit grey levels.
I put some image pdf into it, and found that the images have very obvious boards between the colours.
Which looks like this image:
If the Grey level for ebook device is the same definition as the wiki
16bit should be enough for a picture, or 16 level means 4bit (16 levels of grey)?
|03-09-2010, 03:29 AM||#2|
Join Date: Feb 2008
Device: iLiad, DR1000S, HTC Hero, DR800SG
it just says 16 levels of grey, not 16 bit. 16 levels of grey are enough to display pictures if properly dithered.
|03-09-2010, 06:34 AM||#3|
Join Date: Mar 2006
Location: Mississippi, USA
Device: Kindle 3 and Fire
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.
|03-10-2010, 03:52 AM||#4|
Join Date: Mar 2010
It is actually 16 levels of Gray (4 bit).
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...
|03-12-2010, 08:32 PM||#6|
Join Date: Feb 2009
Location: Berkeley, Califorina
Device: Kindles,SurfacePro2,NookColor,Pocket Edge,Samsung 10.1 Tab,S2 phone
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
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Anyone ever do a large scale professional ePub conversion?||CharlesinCharge||ePub||15||09-14-2010 01:32 PM|
|An observation on ratings...how do you define your scale?||texasnightowl||Calibre||12||08-18-2010 01:59 PM|
|PRS-600 Gray scale||JCSullivan||Sony Reader||3||05-28-2010 08:39 AM|
|4 bit gray-scale images to PDF: a need software||SalvaG||0||12-08-2009 01:58 PM|
|How Do I Scale down photos in an A4 word document?||pdam||iRex||5||09-08-2006 02:26 PM|