Contents | Start | End | Previous: KB0429: Kindle removes some text colours in the downloaded book | Next: KB0431: Why do URLs show in my OpenDocument (ODT) file?
In rare circumstances, Kindle devices may show unwanted artefacts such as a vertical line on an edge of an image.
This can happen if you have very large images in your book; the book viewer has to work extra hard to render the image on-screen, and this can cause a reduction in quality and possibly artefacts along edges.
Also, ensure images aren't being converted to JPEG twice: once by Jutoh, and again by Kindlegen. Kindlegen always converts images to JPEG, even if they are already in JPEG format, and this causes a loss of quality.
To fix these issues, edit your configuration (click Edit next to the "Kindle" or "Mobipocket" configuration selection in the Jutoh Control Panel) and change these two options:
Maximum image width: enter a maximum pixel width such as 800, so that Jutoh resizes large images in your book to a sensible size when compiling.
Convert images to JPEG: set to None, because Kindlegen will resample the JPEG to its own even more compressed JPEG. This will remove one step, so reducing the potential introduction of noise.
Contents | Start | End | Previous: KB0429: Kindle removes some text colours in the downloaded book | Next: KB0431: Why do URLs show in my OpenDocument (ODT) file?