MobileRead Forums - View Single Post - Downsampling of images in ZIP to ePub conversion

netman49 · 03-28-2019, 03:33 PM

I noticed that PNG images are downsized in the conversion process from ZIP file to ePub file in Calibre.
I’ve searched for a setting in Calibre to avoid this resizing, but could not find it.

To be more precise.
When adding a new book tot the Calibre library, Calibre is making a ZIP file of the directory with all the files of the publication, including the images.
In this ZIP file the images keep the original file size, in my case 1920 x 2610 pixels.
When converting the ZIP file to ePUB in Calibre the images are downsized to 872 x 1186 pixels.

Any idea how I can keep the original pixel sizes from the images?

03-28-2019, 03:33 PM	#1
netman49 Publisher Posts: 26 Karma: 10 Join Date: Jan 2009 Location: The Netherlands Device: Cybook Gen3, Sony PRS-650, iPod Touch, iPad	Downsampling of images in ZIP to ePub conversion I noticed that PNG images are downsized in the conversion process from ZIP file to ePub file in Calibre. I’ve searched for a setting in Calibre to avoid this resizing, but could not find it. To be more precise. When adding a new book tot the Calibre library, Calibre is making a ZIP file of the directory with all the files of the publication, including the images. In this ZIP file the images keep the original file size, in my case 1920 x 2610 pixels. When converting the ZIP file to ePUB in Calibre the images are downsized to 872 x 1186 pixels. Any idea how I can keep the original pixel sizes from the images? Last edited by netman49; 03-29-2019 at 04:03 AM. Reason: More details.