04-18-2013, 03:38 PM | #16 |
Mono
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If it did not change, books are printed 150 dpi at best. More points means need for more memory, more CPU speed, etc. The resources needed rise with square of dpi. So also energy consumption...
But sure higher dpi would be nice. |
04-18-2013, 03:46 PM | #17 |
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At least 200dpi would be nice.
Better 300dpi! E-ink offers such screens with a resolution of 2400 x 1650! I would be a big increase of quality for smaller letters and graphics. |
04-18-2013, 04:34 PM | #18 |
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I'm not sure what you mean by this.
Paper books are printed at 600dpi at minimum, and may be 1200dpi or even 2400dpi. You might be thinking the the line screen for continuous images (i.e. photos). LCD screens can certainly better printed resolution for photos, even neglecting the ability to zoom. |
04-19-2013, 10:04 PM | #19 |
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I don't know about you, but most people and I bought the M92 for reading graphic heavy textbooks and pdf. If you want read only text only novels, then why not just get a smaller e-reader?
Last edited by FinancialWar; 04-19-2013 at 10:45 PM. |
04-20-2013, 06:41 AM | #20 | |
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Quote:
In the very beginning I was considering jetBook Color, but even its 204ppi was too little. Reasonable optimum for scanned books is 300ppi at bw colors. However, E-ink has 16 grayscale colors, therefore even 150ppi is satisfactory. Attached is my experiment with 10pt character "P" rendered at various ppi and color depth. Last edited by fatran; 04-20-2013 at 06:57 AM. |
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04-20-2013, 07:13 AM | #21 | |
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Quote:
But let us stick with your suggestion for now: Is there actually a reason why you think 150PPI does not suffice for the ereader's purpose? Are you having trouble reading the text? |
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04-20-2013, 03:50 PM | #22 |
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Good argument there. It's like saying why do you want to buy a car that a car that go above 100 km/h because you never need a faster car due to legal limit....
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04-20-2013, 04:23 PM | #23 |
Mono
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No, ManDay just asks you, why do you think you need more than 150dpi. If you have trouble with some texts, etc. More does not mean always better. 300dpi needs four time more resources (memory, computing power, energy) than 150dpi.
So, what is the benefit of having 300 dpi in your opinion. There are pros, but there are also cons. Benefits should overweight... |
04-20-2013, 08:19 PM | #24 |
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I think that @fatran's image showing the letter "P" rendered at various ppi settings shows the advantage clearly for going from 150 to 300 ppi when the characters are in fixed positions (i.e. in PDF documents). It is even more apparent for small mathematical objects like subscripts and superscripts. So, for scientific and technical documents, a higher resolution would be beneficial.
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04-21-2013, 12:27 AM | #25 | |
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Quote:
There is 8 core phone with 1080p screen at 450ppi and plethora of cheap tablets on the market with beautiful and sharp screens with good processor. If you don't see the benefit, then stay with the m92, no one is going to force you to upgrade. But for me, I would like a sharper screen and I am willing to paid for that feature. Last edited by FinancialWar; 04-21-2013 at 12:41 AM. |
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04-21-2013, 03:47 AM | #26 | |||
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It speaks for itsself that you refuse to respond to my actual question which was "Is there actually a reason why you think 150PPI does not suffice for the ereader's purpose? Are you having trouble reading the text?".
You just brainlessly want sharper, sharper, sharper for the sharper's sake. Which is of course your god-given right to want, but... Quote:
In my country, money doesn't happen to grow on trees. Perhaps you have a better climate for those or mummy and daddy don't miss a chance to spoil their child, I don't know. However, since the majority of countries doesn't have those trees, most people (including me) prefer to not bloat a device with features beyond its purpose. Quote:
As far as I am concerned, the resolution is entirely sufficient as long as don't try to read 2mm large indices with a magnifying glass. Quote:
You know what? Perhaps you should get a $3000, 32-core, 700W desktop workstation with a HD-Screen... I, however, would like to stick with a good battery-lifetime, a light device, and exactly those features which are required of a device which displays texts. And I would like to have upgrades which make sense for that purpose. Last edited by ManDay; 04-21-2013 at 03:51 AM. |
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04-21-2013, 06:59 AM | #27 |
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^ argument coming from a guy who thinks money grow on trees.
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04-21-2013, 04:14 PM | #28 |
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The new Kobo Aura HD has (compared to other E-Readers) a sharper screen (265pp). Still not the 600pp of a book, but heading that way. However, I do not think that it has the annotation capabilities of the M92 and it also sports a smaller (7inch) screen.
However, it does have a rudimentary annotation function (keyboard annotation) and highlight function, and has greatly improved the zoom (the pan function on the Kobo always was excellent), so for readers of highly technical documents it - but for the smaller screen - might be worth a try. What do you think? Is the Aura any viable option for the academic reader? |
04-21-2013, 06:20 PM | #29 |
Mono
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I know that one may have 8 coces, lots of memory, etc. Besides it is more costly it also consumes much more energy. So, my question is. Are you going to pay the price of one fourth to one sixteenth of battery life for 300/600 dpi?
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04-21-2013, 06:47 PM | #30 |
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I wouldn't go to the display smaller than 9inch. M92's 9.7" is minimum for academic reading of fixed layout or scanned texts. You can read comfortably from 2x larger display at half ppi, but I doubt you will enjoy similar comfort at half size and double ppi.
The next, you must ask, what does your reader better than the laptop. If it is another power-hungry device heating in your palms, why not to stay with laptop? Anyway, I am sick of all devices, that need to be charged, when I need to use them. And the second question is support of e-book reading. I was surprised, that expensive ipad4 doesn't have one universal sw reader for usual formats (pdf, djvu, epub ...) and you must search and buy additional sw (anyway I didn't find djvu reader). It is just universal brick for everything and nothing. |
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