![]() |
#31 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@DiapDealer...Thanks for that. What I must also do is remove all cover image file and cover image checks -- including the cover image format check and the cover position check as they will be redundant. And if the cover image file is there in the epub I'll just display a single warning as you've already advised.
You're suggestion for allowing plugin users to set prefs to quell warnings is also a good idea. At least that will allow users to get rid of warnings(like svg warnings) if they prefer. I'll put that in too, probably using json prefs rather than a dialog. Last edited by slowsmile; 08-24-2018 at 11:14 PM. |
![]() |
![]() |
![]() |
#32 |
Grand Sorcerer
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 6,643
Karma: 85000001
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
|
It is only tangentially related to this plugin but I will mention this here because it may relevant to those interested in validating EPUBs for Kindle publication.
The latest version of the Kindle Previewer, 3.25, has some code to perform an image quality check and includes the OpenCV library for analyzing images. It appears to be a work in progress and I haven't found a way to actually enable this feature. Some new messages contained in the program include: "File Validation failed: For details, please see Quality Report." "Cover Image does not meet the image quality bar of 300 PPI." "Cover image occupies 100% of the screen, therefore the image either needs to be greater than 1200 PX width or 1800 PX height." "High Definition Visual Warnings (HDV) - These warnings are for images which does not meet high definition image bar of 300 PPI. We highly recommend fixing these issues to improve the quality of the book for the readers." |
![]() |
![]() |
Advert | |
|
![]() |
#33 | |
Bookmaker & Cat Slave
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 11,471
Karma: 158448243
Join Date: Apr 2010
Location: Phoenix, AZ
Device: K2, iPad, KFire, PPW, Voyage, NookColor. 2 Droid, Oasis, Boox Note2
|
Quote:
I wish I had better, higher insight that I was willing to share, but that's about it. In my experience in dealing with Amazon, on the LITB, quite bluntly, they're guessing, too, typically. Hitch |
|
![]() |
![]() |
![]() |
#34 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@jhowell...
"Cover Image does not meet the image quality bar of 300 PPI." I could perhaps put in a plugin resolution check on all epub ebook images. At the moment, I'm not sure that Bundled Python's Pillow module would be able to get the image resolution. I'll have a look and will put in a resolution check if I can do it. "Cover image occupies 100% of the screen, therefore the image either needs to be greater than 1200 PX width or 1800 PX height." The above problem is covered by my plugin's dual formatting check. If a 'not dual formatted ' warning is given then you can resolve that by simply running the AddKindleMediaQueries plugin which automatically dual formats all ebook images for optimal display on both KF8 and KF7 devices. If you're not bothered about dual formatting your ebook images and prefer just to format your smaller images(ie images less than max screen size) only for KF8 then you can do this buy formatting your smaller ebook images using inline styling and percentage values(which represent percentage of current screen width values). Simple example below: <p class="image-style"><img alt="" src="../Images/image0.jpg" style="width: 20%;height: auto;"/></p> But if you want your KF8 ebook images to be max page size across all KF8 device screens then you can also format them like this(and you shouldn't get errors): <p class="image-style"><img alt="" class="kf8only" src="../Images/image0.jpg" style="width: 100%;height: auto;"/></p> Generally speaking you should also bear in mind that Kindle always prefers the "shrink to fit" approach for adding ebook images at max screen size which means that they prefer using interpolation -- you add an image that is larger than max screen size and Kindle will happily use "shrink to fit" to fit it on the current screen. This is more accurate than expanding a smaller image to fit the page or screen(extrapolation) which can give problems like pixelation. Which is why Kindle usually gives warnings if extrapolation(or expand to fit) is used for max-page-size ebook images. Last edited by slowsmile; 08-24-2018 at 11:25 PM. |
![]() |
![]() |
![]() |
#35 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
Update: The plugin has the following changes in v0.1.2:
* The plugin will now give a warning if there is a cover image file in the epub. There should be no cover image on upload to KDP as per the Kindle Guidelines. Thanks to st_albert and Hitch. * The plugin user can now suppress any plugin warning by accessing the KDPValidator.json file and changing any of the listed warning values to "false". Initial default warning values are all set to "true". Thanks to DiapDealer. Last edited by slowsmile; 08-30-2018 at 10:07 AM. |
![]() |
![]() |
Advert | |
|
![]() |
#36 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@jhowell...Unfortunately the python Pillow module does not appear to be able to determine the resolution(pixels per inch) of an image, so I'm afraid there's no way that I can check ebook image resolution with this plugin.
|
![]() |
![]() |
![]() |
#37 | ||
Grand Sorcerer
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 5,634
Karma: 23190435
Join Date: Dec 2010
Device: Kindle PW2
|
Quote:
Quote:
Code:
imgdata = bk.readfile(cover_id)
img = Image.open(BytesIO(imgdata)).convert('L')
xdpi, ydpi = img.info['dpi']
if (int(xdpi) or int(ydpi)) < 300:
print('dpi is less than 300.')
|
||
![]() |
![]() |
![]() |
#38 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@Doitsu...
"There's a typo in the plugin description and the cover page warning. KindleGen doesn't support Cover html pages, but it does of course support embedded cover images. You might want to change the wording of the message." I'm not really sure what you mean by "support embedded cover images". The reason I advise removal of the cover.xhtml file from the epub was because both st_albert and Hitch advised me(further up on this thread) to add that warning. They should know because they are both professional formatters. The Amazon product image will automatically be added to the epub as the cover image file on KDP conversion. Remember also that this plugin only checks epub 2.0 files for upload to KDP. This plugin cannot check epubs formatted as KFX or epub 3. Pillow supports dpi queries. Here's a snippet: Code:
imgdata = bk.readfile(cover_id) img = Image.open(BytesIO(imgdata)).convert('L') xdpi, ydpi = img.info['dpi'] if (int(xdpi) or int(ydpi)) < 300: print('dpi is less than 300.') My thanks for your advice and for the above code. I searched high and low in the python docs and couldn't find anything on Pillow handling image resolution. I'll get that implemented in my next plugin update. Last edited by slowsmile; 08-31-2018 at 05:12 AM. |
![]() |
![]() |
![]() |
#39 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@jbhowell...Concerning your cover image resolution check request. Unfortunately, I've just realised that I cannot implement the epub cover image resolution check because you should not have a cover image file in your epub when you upload to KDP(as advised by st_albert and Hitch further up on this thread). There is also a cover image warning in the plugin already i.e. a cover image file should not be in your epub when you upload to KDP.
|
![]() |
![]() |
![]() |
#40 | |
Grand Sorcerer
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 6,643
Karma: 85000001
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
|
Quote:
I agree that it is best not to include a cover page/image in an e-book uploaded to KDP since that is supplied separately in the publishing process. Still, it appears that Previewer will be checking cover images. The simplest explanation is that Amazon is assuming that you will include your cover in the book you are previewing, whether or not you include it in the file that you eventually upload to them. A more far out possibility is that Amazon is planning to allow you to preview your finished book using the Kindle Previewer after it has been uploaded and processed by them, but before it is actually published. Evidence pointing to this possibility is that the latest Previewer now allows you to sign into your Amazon account and also contains apparently unused code to download books from their internal servers for previewing. Last edited by jhowell; 08-31-2018 at 08:58 AM. |
|
![]() |
![]() |
![]() |
#41 | |
Grand Sorcerer
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 27,798
Karma: 198099188
Join Date: Jan 2010
Device: Nexus 7, Kindle Fire HD
|
Quote:
KDP warns against including a cover PAGE (meaning an xhtml file used for the sole purpose of displaying a cover image). KDP has no issue with including a properly prepared, manifested cover IMAGE that is identified through KDP's proscribed methods. The request was that you change the warning that KDP doesn't allow cover IMAGES to KDP doesn't allow cover PAGES Same for the request to check the image resolution of images. It is certainly possible (as Doitsu pointed out), and it's certainly allowed, since KDP does (and always has allowed cover IMAGES to be present in uploaded epubs) Cover IMAGES: yes, great, allowed--encouraged actually by the Amazon Kindle Publishing Guidleines. Cover PAGES: no, bad, KDP doesn't want. You should be warning about the addition of cover PAGES and not cover IMAGES. |
|
![]() |
![]() |
![]() |
#42 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@DiapDealer...I've changed the cover image warning to a cover page warning in the release notes. But I now admit to being somewhat confused because you appear to be disagreeing with what both st_albert and Hitch have been saying on this thread about not having a cover.xhtml file in your epub when you upload to KDP.
Here is what Hitch has said about the cover.xhtml file in this thread: "We make our files as does St. Albert--we build our ePUB, get a working, ePUB-checked copy, and then we remove the cover.xhtml page/file. We leave the meta pointing at the cover, as well as the Guide (for the Go To functionality). Honestly, we haven't made a MOBI from an ePUB with a cover.xhtml file in at least 5 years, possibly longer. As long as Amazon has been inserting the covers "for" the publishers." But you've said this in your last post: "Same for the request to check the image resolution of images. It is certainly possible (as Doitsu pointed out), and it's certainly allowed, since KDP does (and always has allowed cover IMAGES to be present in uploaded epubs)". Who is right about removing or not removing the cover.xhtml file? You or Hitch? I really don't want to argue about whether the cover.xhtml file should be in the epub or not. I just want to know who is right since you and Hitch seem to have directly opposing opinions on whether the cover.xhtml file should be removed or not before upload to KDP. You also keep referring to the cover page and cover image while I've been talking about nothing but the cover image file -- cover.xhtml. Last edited by slowsmile; 08-31-2018 at 11:59 AM. |
![]() |
![]() |
![]() |
#43 | |
Grand Sorcerer
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 27,798
Karma: 198099188
Join Date: Jan 2010
Device: Nexus 7, Kindle Fire HD
|
Quote:
I'll try again. ANY *.xhtml file intended (and semantically marked) as a cover PAGE should not be included in an epub you upload to KDP. But that has nothing to do with a cover IMAGE being present (and properly marked as such and resolution-compliant per the Kindle Publishing Guidelines) in the epub--which is allowed and encouraged. Last edited by DiapDealer; 08-31-2018 at 03:21 PM. |
|
![]() |
![]() |
![]() |
#44 |
Witchman
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 628
Karma: 788808
Join Date: May 2013
Location: Philippines
Device: Android S5
|
@DiapDealer...Yes, I am still confused by what you say.
On the one hand you are saying that a cover PAGE(aka cover.xhtml??) should not be included in an epub that you uploaded to KDP. Then you say that a cover IMAGE is allowed. But isn't the cover IMAGE situated in the cover PAGE ?? So how can you not have a cover PAGE while at the same time have a cover IMAGE in an epub?? Unless I'm missing something, you seem to be inferring that the cover IMAGE is not situated in the cover PAGE but is entirely separate from the cover PAGE. I admit that I am having a problem with that. How can a cover IMAGE be present when the cover PAGE is not there?? |
![]() |
![]() |
![]() |
#45 |
Grand Sorcerer
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Posts: 6,643
Karma: 85000001
Join Date: Nov 2011
Location: Charlottesville, VA
Device: Kindles
|
I am also confused by the cover issue. I do know that using cover HTML is a no-no.
I have been assuming that you can just leave out the cover image altogether and that Amazon would automatically insert the separately uploaded marketing cover as the internal cover. Hitch implied that is the case earlier in this thread. Looking at the Amazon Kindle Publishing Guidelines (version 2018.2) section 4.2 is titled "Internal Content Cover Image Is Mandatory" and lists two methods of linking to a cover image from the OPF. It also states "Do not add an HTML cover page to the content in addition to the cover image." So, according to that document, the internal cover image is required. |
![]() |
![]() |
![]() |
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Trying to Upload my Ebook to KDP | kgjones | Calibre | 5 | 09-16-2015 08:07 AM |
Upload to KDP | Peter21 | Kindle Formats | 4 | 03-06-2014 03:01 PM |
KDP Adds $1.5 Million Holiday Bonus for KDP Select Authors | DreamWriter | Writers' Corner | 3 | 11-29-2012 10:51 PM |
KDP Upload and Writer2ePub | teh603 | Writer2ePub | 1 | 09-22-2012 02:19 AM |