Re: [gutvol-d] Technically off topic but I hope you could help
This FAQ has recommendations WRT page scans: http://www.gutenberg.org/wiki/Gutenberg:Scanning_FAQ#S.21._Will_PG_store_sca...
up to 600 dpi, and should be stored as black-and-white TIFFs with CCITT-4 (aka ITU-G4 or Fax Group 4) compression
On 27-Jan.-2019 13:05, Gardner Buchanan wrote:
This guidance in the FAQ is aimed at illustrations, not raw page scans. I got the impression you were looking to include raw page scans which would generally be ~300-600dpi and could be above 3,000 pixels on the long axis. Is there guidance about what to do with page scans being contributed as part of a Gutenberg project?
On 27-Jan.-2019 12:04, Ken Arromdee wrote:
On Sat, 26 Jan 2019, Greg Newby wrote:
Concerning (Ken's) your comment about Weird etc.: I don't know what scanning policy you are writing about. It's perfectly acceptable to include high resolution scans.
http://www.gutenberg.org/wiki/Gutenberg:HTML_FAQ#8._Recommendation:_Images
"Since most people will be viewing these images in a browser on a screen with a resolution below or around 1000 pixels wide, you should mostly make your images not much wider than 600 pixels. If you have a 2000- or 3000-pixel-wide image derived from an original scan, you need to look at resizing it."
(Is epub generated from HTML? That could compound the problem since epub is often read on tablets which have higher resolution than PC screens).
I see this is a wiki, so I could delete the text in question, but I don't know what I could replace it with since I don't know what sizes PG really recommends. Also, this guideline seems to reflect actual practice for many books on pg, and even if those books were scanned years ago, the images in them are now permanently small, since nobody's going to go through the back catalog and rescan everything that has images.
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-- ============================================================ Gardner Buchanan <gbuchana@teksavvy.com> Ottawa, ON FreeBSD: Where you want to go. Today.
On Sun, Jan 27, 2019 at 01:22:41PM -0500, Gardner Buchanan wrote:
This FAQ has recommendations WRT page scans:
http://www.gutenberg.org/wiki/Gutenberg:Scanning_FAQ#S.21._Will_PG_store_sca...
I updated this, too: https://www.gutenberg.org/wiki/Gutenberg:Scanning_FAQ#S.19._I_want_to_includ...
up to 600 dpi, and should be stored as black-and-white TIFFs with CCITT-4 (aka ITU-G4 or Fax Group 4) compression
Yep. Or, of course, color if the page is color. - Greg
On 27-Jan.-2019 13:05, Gardner Buchanan wrote:
This guidance in the FAQ is aimed at illustrations, not raw page scans. I got the impression you were looking to include raw page scans which would generally be ~300-600dpi and could be above 3,000 pixels on the long axis. Is there guidance about what to do with page scans being contributed as part of a Gutenberg project?
On 27-Jan.-2019 12:04, Ken Arromdee wrote:
On Sat, 26 Jan 2019, Greg Newby wrote:
Concerning (Ken's) your comment about Weird etc.: I don't know what scanning policy you are writing about. It's perfectly acceptable to include high resolution scans.
http://www.gutenberg.org/wiki/Gutenberg:HTML_FAQ#8._Recommendation:_Images
"Since most people will be viewing these images in a browser on a screen with a resolution below or around 1000 pixels wide, you should mostly make your images not much wider than 600 pixels. If you have a 2000- or 3000-pixel-wide image derived from an original scan, you need to look at resizing it."
(Is epub generated from HTML? That could compound the problem since epub is often read on tablets which have higher resolution than PC screens).
I see this is a wiki, so I could delete the text in question, but I don't know what I could replace it with since I don't know what sizes PG really recommends. Also, this guideline seems to reflect actual practice for many books on pg, and even if those books were scanned years ago, the images in them are now permanently small, since nobody's going to go through the back catalog and rescan everything that has images.
_______________________________________________ gutvol-d mailing list gutvol-d@lists.pglaf.org http://lists.pglaf.org/mailman/listinfo/gutvol-d Unsubscribe: http://lists.pglaf.org/mailman/options/gutvol-d
-- ============================================================ Gardner Buchanan <gbuchana@teksavvy.com> Ottawa, ON FreeBSD: Where you want to go. Today.
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participants (2)
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Gardner Buchanan -
Greg Newby