Just did some experimentation with photos. Took a JPG, converted it to tiff
$ convert ~/Photos/2008/01/12/IMG_4063.JPG IMG_4063.tif forced the compression with libtiff $ tiffcp -c jpeg:75 IMG_4063.tif IMG_4063.75.tif wrote it as a PDF $ tiff2pdf -o IMG_4063.75.pdf IMG_4063.75.tif imported the same tiff into gscan2pdf and wrote it as a PDF: $ ls -l ~/Photos/2008/01/12/IMG_4063.JPG IMG_4063.tif IMG_4063.75* -rwxr-xr-x 1 jeff jeff 3286311 2008-01-13 17:31 /home/jeff/Photos/2008/01/12/IMG_4063.JPG -rw-r--r-- 1 jeff jeff 632922 2008-06-15 09:41 IMG_4063.75g.pdf -rw-r--r-- 1 jeff jeff 694867 2008-06-15 09:38 IMG_4063.75.pdf -rw-r--r-- 1 jeff jeff 700976 2008-06-15 09:34 IMG_4063.75.tif -rw-r--r-- 1 jeff jeff 7805388 2008-06-15 09:31 IMG_4063.tif If I import the JPG directly into gscan2pdf, this becomes: -rw-r--r-- 1 jeff jeff 637825 2008-06-15 09:47 IMG_4063.75g.pdf which is still better than libtiff. So - as you have already said, it is possible to get small PDFs from gscan2pdf if you choose the appropriate compression. The question then is - how best to help the user choose the compression? Count the depth of the image - 1bit = LZW, 2-3 bit = PNG, >3bit = JPG? Have this as an extra "automatic" compression level? This at least would be a sane way to deal with several pages with different depths. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
