01-11-2019, 05:09 AM | #1 |
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故事主要描述當伐木
故事主要描述當伐木
Last edited by PenguinCEO; 04-16-2020 at 12:21 PM. |
01-11-2019, 12:13 PM | #2 |
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Since e-ink is low contrast, many images would greatly benefit from contrast stretch.
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01-12-2019, 05:58 AM | #3 |
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01-12-2019, 10:44 AM | #4 |
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故事主要描述當伐木
Last edited by PenguinCEO; 04-16-2020 at 12:22 PM. |
01-12-2019, 11:45 AM | #5 |
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01-12-2019, 11:48 AM | #6 | |
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Quote:
If you're just aiming at E-Ink screens, converting colour images into high contrast greyscale can also help. (By choosing the colour->greyscale conversion carefully you can obtain a better result than relying on the default conversion in the ebook reader.) |
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01-12-2019, 08:02 PM | #7 | |
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01-13-2019, 09:51 AM | #8 |
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01-13-2019, 01:46 PM | #9 | |||
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I think maps, drawings, and other nominally black and white illustrations should use the full dynamic range just as text is nominally full black on a full white background. Reading software on high contrast displays already addresses the harshness that can result from this by providing options to set other background colors such as sepia. This should also be done for images. Author/publishers can set the background for non-photographic images to be transparent, yet another reason to use PNG. It is very frustrating to have to squint at poorly scanned maps and drawing that could easily be quite legible with proper contrast. 5 to 8 inch low contrast e-ink is a challenging medium for drawings and photographs but they are capable looking pretty good and publishers should at least put some effort into it. |
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01-13-2019, 02:01 PM | #10 | |
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However I really wish publishers hadn't been producing such needlessly crap maps and drawings all these years. I am glad to see that a few books are starting to have decent images (probably because the original artwork was computer generated rather than scanned). It is very discouraging to see that many of the computer generated images have terrible JPEG artifacts. |
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01-13-2019, 02:12 PM | #11 |
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01-13-2019, 02:38 PM | #12 | |
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01-13-2019, 03:13 PM | #13 |
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Agreed....and I certainly wouldn't "dumb down" an epub just to make it look better on eink at the expense of every other device.
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01-13-2019, 03:41 PM | #14 | ||
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How is providing proper contrast dumbing down an EPUB? |
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01-13-2019, 03:56 PM | #15 |
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I do the same -- that is, use color whenever I have it. Of course I'm not a graphic artist, but I really can't see the difference between a color image on my Paperwhite and a grayscale-optimized image.
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