[Gimp-user] Large file size on TIFF to JPEG conversion

[John Coppens]

On Sat, 30 May 2009 08:00:05 -0700 (PDT)
James Cobban <jamescobban at sympatico.ca> wrote:

> When I got home I used GIMP to extract the individual images into
> JPEGs. Unexpectedly the JPEGs are enormous!  For example one of the
> TIFF files that was 5MB in total, containing 5 images remember,
> exported into JPEGs which ranged from 9.0MB to 9.6MB!  That is using
> the default 85% quality.

Note that in some cases, lossless compression can give you much better
results than jpg. Particularly if the original is a complicated line
drawing (high contrast). Also, if the original is using indexed colors,
it may be more efficient. And if the original is a b/w 1 bit/pixel image,
even more so.

Try to convert to PNG or GIF and check if those formats give you more
logical sizes - they work better with the mentioned image types.

John