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Old 11-30-2018, 04:03 PM   #51
Gregg Bell
Gregg Bell
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Posts: 2,249
Karma: 3917588
Join Date: Jan 2013
Location: Itasca, Illinois
Device: Kindle Touch 7, Sony PRS300, Fire HD8 Tablet
Quote:
Originally Posted by slowsmile View Post
Gregg...

"The back matter images (of my previous ebook covers) in my current ebooks are my main concern now. I noticed that your cleaner assigns a proportionately higher percentage to larger images. I'm thinking that's so the really small images don't get too badly stretched on really big screens. Would that be right?"

Adjusting the image size after running the plugin is relatively easy. After you've run the plugin in Sigil, in Text View put the cursor to the left of the relevant image and then switch to HTML View. Within the <img> tag just change the "width" value. To increase the image size, increase the % width value and to decrease it just decrease the image width value. This allows you to easily fine tune the image size to your own liking.
Thanks very much, William. Yeah, I noticed I could do that, but I ran into what seemed unusual in that the bigger image (300X450) at the same percentage was a little smaller than the smaller image (200X300). (screenshot)

I noticed too that when I ran the plugin and did not request the serif language option, it added it anyway.

Quote:
Originally Posted by slowsmile View Post


In general, for images that are smaller than max screen width in pixels, this plugin will automatically preserve the aspect ratio of the image as well as preserve it's approximate size proportionate to the current screen size.

Another tip which might help. When you are judging image size in Sigil, remember that using percentage values will give a size that is completely dependant on current screen width. So after I use this plugin in Sigil, in Text View I always reduce the Sigil app window to its minimum width. This gives me a useful ballpark view of what the image might look like on a tablet.
By Text View do you mean "Book View"? My 9.8 Sigil only has Book and Code view. And I saw no way to find a minimum width on either.

Or perhaps the Sigil app window is something else?

Quote:
Originally Posted by slowsmile View Post

It's also fairly accepted that any submitted full-screen image that you add should normally be larger than than the actually device screen. For an image larger than your screen size, my plugin merely reduces it's width/height to 100% of the current screen width.
With my backmatter images (an author photo and book covers of my previous ebooks) I want to go nowhere near 100% of the devices' screen size. The testing that I've done so far, I thought 50% was too big.

The trick is going to be getting the right image size and the right percentage.

Quote:
Originally Posted by slowsmile View Post

You should also never add a full page image that is smaller than the max screen width/height of the current device because this can cause problems like image pixelation and blurriness due to image extrapolation. As an example of this, Kindle advises that ebook cover max-page-size images should be 1600px x 2560px as the ideal. This also applies to max-page-size ebook images. But if you've got hundreds of maxi-page-size images in your ebook, then perhaps best to reduce their size to 1200px x 800px with compression to avoid any download size penalty on your ebook profit payout as occurs with some vendors like Kindle.
Yeah, it can get expensive in a hurry.

Hey, what I've been doing is making a copy of my most recent epub and then running your plugin on the copy. Then copying and pasting the HTML info for the images into the original file. To do that, I don't need to do anything with CSS, do I?

And I'm still experimenting. I'm going to resubmit one of my ebooks to KDP with all kinds of dimensions and percentages. I have a tablet now, so I'll get a better idea of what it looks like than on just my Kindle 7 Touch ereader.

Thanks. (I'll post back.)
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