--bg-slices=N+...+N

Encoding quality of background layer, expressed as integers ranging from 1 to 140. The default is 72+11+10+10. Each number corresponds to the quality of the successive wavelet refinements, for example:

72: wavelet layer

11: refinement 1

10: refinement 2

10: refinement 3

NOTE: --bg-slices is not compatible with --bg-quality. The default corresponds to --bg-quality.

Example

pdftodjvu --bg-slices=80+12+50+50 document.pdf [document.djvu]