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 MobileRead Forums Color New to the JetBook world..intrested in buying JetBook Color

02-23-2012, 11:44 AM   #91
andyh2000
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Quote:
 Originally Posted by mod186k1 ... It's clear that the quality is about double => 200dpi ...
a) It wasn't me it was LuBiB posting those pictures

b) guessing dpi doesn't seem very accurate

c) why not just calculate the dpi of the jetBook Color?

It's got a 9.7" diagonal screen. We know the screen aspect ratio is 3:4 (1200:1600) so in those numbers the diagonal length is 5 (it's a 3:4:5 right angle triangle). (9.7/5) * 4 = 7.76" screen height, which at 1600 pixels gives 1600/7.76 or ~ 206 dpi.

So your guessing was pretty accurate after all.

Andrew

Last edited by andyh2000; 02-23-2012 at 02:40 PM. Reason: Ratio not ration

02-23-2012, 11:55 AM   #92
PF4Mobile
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Device: Kobo Touch, Nook Touch, EEE 800 Note, Entourage PE, finally M92
Quote:
 Originally Posted by andyh2000 a) It wasn't me it was LuBiB posting those pictures b) guessing dpi doesn't seem very accurate c) why not just calculate the dpi of the jetBook Color? It's got a 9.7" diagonal screen. We know the screen aspect ration is 3:4 (1200:1600) so in those numbers the diagonal length is 5 (it's a 3:4:5 right angle triangle). (9.7/5) * 4 = 7.76" screen height, which at 1600 pixels gives 1600/7.76 or ~ 206 dpi. So your guessing was pretty accurate after all. Andrew
I would rather believe in numbers like above than in pictures
However the above calculation starts with the assumption that the resolution is 1200:1600.
I would still like to see the PDF that has color highlighting on it in a picture side by side with an A4 paper with the same image. Since I have not seen how the ereader displays such a PDF I can not entirely trust the numbers above.

In pictures M92 (which I now proudly own :-)) ) looked OK in portrait mode. Now that I have it in my hands I know that it is usable just in landscape mode for reading scientific or technical papers.

02-23-2012, 02:36 PM   #93
Beryll Snyder
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Quote:
 Originally Posted by PF4Mobile In pictures M92 (which I now proudly own :-)) ) looked OK in portrait mode. Now that I have it in my hands I know that it is usable just in landscape mode for reading scientific or technical papers.
I also used landscape mode for PDFs mostly.
That is why some people think it would be better to have a 12" reader.
I am not sure if I asked this before: in landscape mode only part of the original page is displayed. When I was using it, the page down button got me somewhere in the text and I had to scroll to the last line I was reading.
So continous reading was hampered, to say the least.
Does this work now?
Or how do you manage this?

 02-23-2012, 03:43 PM #94 PF4Mobile Guru   Posts: 621 Karma: 3526 Join Date: Jun 2011 Device: Kobo Touch, Nook Touch, EEE 800 Note, Entourage PE, finally M92 Are you asking about M92? Then you are asking in the wrong thread Check my thread on PDF reading. To answer here ...yes it works Let's say the "viewfinder" is in landscape mode and the document is portrait orientation If I use zoom between two points then I would be able to read the page in two/three steps just pushing the OK (top of the screen now) or pressing the < or > at the bottom of the screen Since this is redundant functionality I would like to see the OK button moving the viewfinder or the document one row at a time up or down (that would be step by step as opposite to advancing a viewfinder at a time)
02-24-2012, 01:39 AM   #95
Beryll Snyder
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Device: Nook classic, PB 903, Onyx M92
Quote:
 Originally Posted by PF4Mobile Are you asking about M92? Then you are asking in the wrong thread Check my thread on PDF reading. To answer here ...yes it works Let's say the "viewfinder" is in landscape mode and the document is portrait orientation If I use zoom between two points then I would be able to read the page in two/three steps just pushing the OK (top of the screen now) or pressing the < or > at the bottom of the screen Since this is redundant functionality I would like to see the OK button moving the viewfinder or the document one row at a time up or down (that would be step by step as opposite to advancing a viewfinder at a time)
THX!!

02-24-2012, 05:09 PM   #96
ProDigit
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Quote:
 Originally Posted by andyh2000 a) It wasn't me it was LuBiB posting those pictures Andrew
Those pictures originally came from me; and I deliberately chosen a page with such amounts of text that on an 800x600 resolution you would not be able to read the text (like in the example of mod186k1)

I know my Sony PRS 505, and know what it can,and can not display,and just like the example above, the text will be unclear.
There's indeed no doubt that black resolution is 1600x1200 pixels.
Color and grey resolution are 800x600 pixels, white should be 800x600,but they actually also use Red,Green, and blue to increase resolution of white to 1600x1200.

So both are right.