Yesterday, I got a comment on Jbig2

Hi Steven,
thanks for the port to windows. It works very good, produces small pdf-file sizes. Only one strange thing happens. The generate pdf files have a huge page-size. For example if I process A4-size pages (29.7×20.9cm) @400dpi tiff or png the pdf file size is 164.9×116.6 cm.
Is it possible to fix this by the python pdf.py or is jbig2.exe responible for this?
Thanks
Armin

after check the last version pdf.py, I notice it uses a default DPI(600). Images has different DPI, so if you want to use pdf.py, you need always modify it, it is not a good solution.

Then I check the source code of jbig, and found in jbig2_page_info structure ,

struct jbig2_page_info {
  u32 width;
  u32 height;
  u32 xres;
  u32 yres;
...

we can get xres and yres, so we can directly use xres and yres to generated proper page size.

and here is the patch file

btw, you can also download the last version jbig2 from here.

P.S.

Armin became the first user, and here is his response,

Hi Steven,
thank you very much for your quick response, and the new pdf.py
which works perfect. (I checked it with my 400dpi page scans.
the pdf page size is now of the same size as the scans)

Thank you so much,
Greetings from rainy Germany :-)

Armin

Witwall.com just releases a new online application, name Decrypt PDF Online. It has some great features,

• Support Standard RC4 40-bit, 128-bit encryption
• Support 128-bit AES(AES128/AESV2), 256-bit AES(AES256/AESV3) encryption.
• Support Owner password encryption(do not need password) and User Password encryption(need the password).
• Free and platform independence/cross platform.
• Dot need Adobe Acrobat or Adobe Reader
• Support up to Adobe Acrobat X encryption

Feel free to try it.

My Batch ReaderEnable software supports batch convert PDF files with one of the following features,

• Enable For Commenting and Analysis In Adobe Reader(aka Reader Enable and called “Enable Commenting & Measuring…” in Adobe Acrobat X Pro)
• Enable TypeWriter Tool in Adobe Reader(aka TypeWriter Enable, called “Enable Adding Text in Document (that are not fillable forms)…” in Adobe Acrobat X Pro
• Enable usage rights for Adobe Reader (aka Usage Rights Enable called “Enable Additional Features…” in Adobe Acrobat X Pro)

btw, Batch ReaderEnable has three editions,

• GUI Version(Window Version)
• Console Version
• Hotfolder Automation/File Monitor/Folder monitor Version, automatically monitor the selected folder(with sub-folder) and convert the new PDF files in the folder

• If want to buy GUI Version and Console Version, please click here, and If you want to Buy Hotfolder version, please visit here.