Inserted images pick up artifacts

slayda · 10-28-2011, 12:10 PM

When inserting images (using MS Word) into an RTF file, and then using Calibre to convert to the file to epub (or Mobi) the image picks up some linear artifacts. Sometimes they are vertical and sometimes horizontal(see example). However if I save the file as HTML (from MS Word) the images do not seem to pick up these artifacts. Is there some problem with the way Calibre converts from RTF?

Example images: First is the original, The second is from the 'RTF to epub' conversion.

kovidgoyal · 10-28-2011, 11:53 PM

RTF uses an arcane and Microsoft specific image format called WMF. calibre contains some code to convert these images, but it can ocassionally cause artifacts, in such cases, you should convert to HTML using Microsoft Word.

10-28-2011, 12:10 PM	#1
slayda Retired & reading more! Posts: 2,764 Karma: 1884247 Join Date: Sep 2006 Location: North Alabama, USA Device: Kindle 1, iPad Air 2, iPhone 6S+, Kobo Aura One	Inserted images pick up artifacts When inserting images (using MS Word) into an RTF file, and then using Calibre to convert to the file to epub (or Mobi) the image picks up some linear artifacts. Sometimes they are vertical and sometimes horizontal(see example). However if I save the file as HTML (from MS Word) the images do not seem to pick up these artifacts. Is there some problem with the way Calibre converts from RTF? Example images: First is the original, The second is from the 'RTF to epub' conversion. Attached Thumbnails Last edited by slayda; 10-28-2011 at 12:13 PM.

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10-28-2011, 11:53 PM	#2
kovidgoyal creator of calibre Posts: 45,609 Karma: 28549044 Join Date: Oct 2006 Location: Mumbai, India Device: Various	RTF uses an arcane and Microsoft specific image format called WMF. calibre contains some code to convert these images, but it can ocassionally cause artifacts, in such cases, you should convert to HTML using Microsoft Word.