-scanimage --mode ${color_mode} --resolution ${resolution} ${scan_area} | \
- convert - -compress jpeg -quality ${jpeg_quality} ${src}.${extension}
+scanimage --format=pnm --mode ${color_mode} --resolution ${resolution} ${scan_area} | \
+ convert - -compress jpeg -quality ${jpeg_quality} ${resize_pdf} \
+ ${src}.${extension}