Vuescan - *.bmp ?

  • Thread starter Thread starter Allan
  • Start date Start date
A

Allan

I'm trying Vuescan out for various reasons and I was just going
through the settings. I've already scanned dozens of books in the
original software that came with the scanner. The books are like
comic books - with hand-drawn, color drawings.

Anyway... All those books are already saved in *.bmp format, so I'd
like to continue with that. But I can't find *.bmp as an option in
Vuescan - only *.jpg or *.tiff ...

Can Vuescan save files as *.bmp ?

Allan
 
Allan said:
I'm trying Vuescan out for various reasons and I was just going
through the settings. I've already scanned dozens of books in the
original software that came with the scanner. The books are like
comic books - with hand-drawn, color drawings.

Anyway... All those books are already saved in *.bmp format, so I'd
like to continue with that. But I can't find *.bmp as an option in
Vuescan - only *.jpg or *.tiff ...
Click to expand...

Just about no one uses BMP files any more so it is very likely they
don't.
But you can use a program like IrFanView to batch convert them from
tiff to bmp.

Scott
 
But you can use a program like IrFanView to batch convert them from
tiff to bmp.
Click to expand...

I'd advise to do it the other way round: batch convert existing BMPs
to TIFF, perhaps with (lossless) compression.

TIFF is more flexible, usually smaller, very well supported everywhere
- the de facto standard for images in various modes. even the standard
fax file format is a TIFF.
 
I'd advise to do it the other way round: batch convert existing BMPs
to TIFF, perhaps with (lossless) compression.

TIFF is more flexible, usually smaller, very well supported everywhere
- the de facto standard for images in various modes. even the standard
fax file format is a TIFF.
Click to expand...

Thanks for the suggestion - I may do that. It's just that when I
first started scanning these books, the bmp files resulted in the
smallest size.

So can Vuescan save as bmp, or only tiff & jpg?
 
SNIP
So can Vuescan save as bmp, or only tiff & jpg?
Click to expand...

TIFF, JPG, PDF, TXT (as OCR output), but BMP only as an index file
(e.g. a thumbnail index of all scanned files in a session).

Bart
 
Evo2Me said:
I'd advise to do it the other way round: batch convert existing BMPs
to TIFF, perhaps with (lossless) compression.

TIFF is more flexible, usually smaller, very well supported everywhere
- the de facto standard for images in various modes. even the standard
fax file format is a TIFF.
Click to expand...
I would agree with this, bmp files are a windows format where as tiff
is pretty universal.
As for size I would thing they would be very close to the same.

Scott
 
Evo2Me said:
TIFF has one or two standard lossless compression modes.
Click to expand...
But these modes never seem to work for photographs.
In Photoshop if you turn on compression when saving a tiff file it will
be larger
then if compression is off, for photographs that is.

Scott
 
Scott W said:
Evo2Me wrote: SNIP
Click to expand...
But these modes never seem to work for photographs.
In Photoshop if you turn on compression when saving a tiff
file it will be larger then if compression is off, for
photographs that is.
Click to expand...

That depends on the bits/channel mode you are in and on image content.
You are correct that on many 16-b/ch images there is a risk of even
*increasing* the file size, but for 8-b/channel images (BMPs are
usually also 8-b/ch) it can make a significant difference.

I recently had to compress a 28630 x 11906 pixel up-sampled printfile
in order to fit it on a single CD. The 8-b/ch file sizes where as
follows:
975 MB uncompressed TIFF
404 MB LZW compressed TIFF
387 MB ZIP compressed TIFF
358 MB compressed PNG
165 MB Lossy compressed JPEG @ max. quality 12

I do know that the up-sampling reduces some of the lowest bit
fluctuations, but I also re-sharpened the result, otherwise the
compression would have been even more impressive, for an image file.

So it's always worth a try, especially on 8-b/ch files.

Bart
 
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