PDF readers

[Gribouillis]

I'm considering to turn the pdf pages into jpgs, then i have more pixel counting possibilities.

Output:
$ ls -l /usr/bin/*pdf*
-rwxr-xr-x 1 root root   1007 sept. 26 16:05 /usr/bin/dvipdf
-rwxr-xr-x 1 root root    698 sept. 26 16:05 /usr/bin/pdf2dsc
-rwxr-xr-x 1 root root    909 sept. 26 16:05 /usr/bin/pdf2ps
-rwxr-xr-x 1 root root  18824 sept.  6 11:32 /usr/bin/pdfattach
-rwxr-xr-x 1 root root  23032 sept.  6 11:32 /usr/bin/pdfdetach
-rwxr-xr-x 1 root root  23064 sept.  6 11:32 /usr/bin/pdffonts
-rwxr-xr-x 1 root root  39448 sept.  6 11:32 /usr/bin/pdfimages
-rwxr-xr-x 1 root root  59928 sept.  6 11:32 /usr/bin/pdfinfo
-rwxr-xr-x 1 root root  22920 sept.  6 11:32 /usr/bin/pdfseparate
-rwxr-xr-x 1 root root  35608 sept.  6 11:32 /usr/bin/pdfsig
-rwxr-xr-x 1 root root 137712 sept.  6 11:32 /usr/bin/pdftocairo
-rwxr-xr-x 1 root root 108968 sept.  6 11:32 /usr/bin/pdftohtml
-rwxr-xr-x 1 root root  35240 sept.  6 11:32 /usr/bin/pdftoppm
-rwxr-xr-x 1 root root  35360 sept.  6 11:32 /usr/bin/pdftops
-rwxr-xr-x 1 root root  43544 sept.  6 11:32 /usr/bin/pdftotext
-rwxr-xr-x 1 root root  31112 sept.  6 11:32 /usr/bin/pdfunite
-rwxr-xr-x 1 root root    272 sept. 26 16:05 /usr/bin/ps2pdf
-rwxr-xr-x 1 root root    215 sept. 26 16:05 /usr/bin/ps2pdf12
-rwxr-xr-x 1 root root    215 sept. 26 16:05 /usr/bin/ps2pdf13
-rwxr-xr-x 1 root root    215 sept. 26 16:05 /usr/bin/ps2pdf14
-rwxr-xr-x 1 root root   1078 sept. 26 16:05 /usr/bin/ps2pdfwr

you could try pdftohtml for example, it may turn your pdf array into a html array.