I’ve noticed that the image quality in BloomPUBs is lower than in the corresponding PDFs. It seems clear that the BloomPUB creation process downsamples images. What is the standard size or resolution that images are downsampled to?
Currently, images in BloomPUBs and online READing are downsampled to a max dimension of 600 pixels.
This is to better serve users who have poor internet and/or limited memory on their devices.
The PDF, as you note, utilizes the full image quality.
Recently, some Bloom users have asked for an option to increase the quality of images in their BloomPUBs and we provided a “back door” way to change this:
In the publish-settings.json
file for the Bloom book, change
"imageSettings":null
to
"imageSettings":{"maxWidth":1200,"maxHeight":900}
Then re-upload the book to Bloom Library.
1 Like
1200 x 900 is our proposal for a higher tier of resolution, but this can be increased.