convert pbm -> tiff -> tiffcp -> tiff2pdf . Getting 5mm page

Question

I usually scan multi-page files, and I'm using an easy way.

for f in ???\.pbm; do 
   convert -compress Group4 $f ${f%pbm}tiff; 
done;

tiffcp *\.tiff o.tiff; 

tiff2pdf o.tiff -o o.pdf

But this way I can get good TIFF and really bad PDF.

Here are outputs of identify:
(similar for each page)

Image: o.tiff
Format: TIFF (Tagged Image File Format)
Class: DirectClass
Geometry: 1248x1649+0+0
Resolution: 72x72
Print size: 17.3333x22.9028

Image: o.pdf
Format: PDF (Portable Document Format)
Class: DirectClass
Geometry: 17x23+0+0
Resolution: 72x72
Print size: 0.236111x0.319444

I tried to use density settings on all steps, but nothing helped me. Anybody knows where the mistake is?

Answer 1

In the tiff2pdf step, try to use this command:

 tiff2pdf  -p A4  -F  -o o.pdf  o.tiff

• -p A4: Force the PDF to use ISO A4 page size (you can also use letter or legal).
• -F: Force TIFF to fill the page completely.