Re: [Bug 922162] Re: pdf output file is 6 times bigger than if created by simple-scan
On 30 January 2012 10:58, tranchais wrote: >> You say that you are using thresholding, but the log file doesn't show >> this. > Yes, it does, on lines 76 and 80 No. Those just tell you the default settings, should you use the threshold tool. To actually use it, you have to go to Tools/Threshold. ** Changed in: gscan2pdf (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/922162 Title: pdf output file is 6 times bigger than if created by simple-scan To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gscan2pdf/+bug/922162/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 922162] Re: pdf output file is 6 times bigger than if created by simple-scan
Le 30/01/2012 08:01, Jeffrey Ratcliffe a écrit : > As I said, the file size depends heavily on the compression. > > You are using JPG compression, which is good for photo-type images, but > not for scans of text. > > The image is 8-bit, when 1-bit would have done. > > You say that you are using thresholding, but the log file doesn't show > this. Yes, it does, on lines 76 and 80 > > Try scanning with scan mode = lineart, and save the PDF with compression > = auto. > Ok, it works fines this way, thank you for your help. It would be nice to document that somewhere , because in my opinion, many scan are done just for plain text documents. I am really pleased with your help, fast and efficient, and with this program. Cheers -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/922162 Title: pdf output file is 6 times bigger than if created by simple-scan To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gscan2pdf/+bug/922162/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 922162] Re: pdf output file is 6 times bigger than if created by simple-scan
Le 26/01/2012 17:36, Jeffrey Ratcliffe a écrit : > This depends heavily on the compression options you chose when saving > the PDF, and whether you embedded OCR output. Please start with > > gscan2pdf --log=log > > save a PDF, close gscan2pdf, and post the log file. > Thank you for your quick answer. In my scanning options I use neither ocr output nor file cleaning (I use a french user interface, it might be scan cleaning instead of file cleaning) You will find as attached files: 1. the log output (log_gscan.txt) 2. the file as output by gscan2pdf (test_gscan2pdf_1_500-12.pdf) : 500 means white threshold=0.500 and 12 black threshold=0.12 3. the file as output by simple-scan (test_simplescan_1.pdf You will notice that, in additionto the file size problem, the quality of the output file is much better with simple-scan. When the same document sheet is scanned with the default threshold values (white=0.005 and black=0.12) the file size goes down to 317,2 kb, which is still 4 times the size of simple-scan, with no visible quality improvement. ** Attachment added: "log_gscan.txt" https://bugs.launchpad.net/bugs/922162/+attachment/2696141/+files/log_gscan.txt ** Attachment added: "test_gscan2pdf_1_500-12.pdf" https://bugs.launchpad.net/bugs/922162/+attachment/2696142/+files/test_gscan2pdf_1_500-12.pdf ** Attachment added: "test_simplescan_1.pdf" https://bugs.launchpad.net/bugs/922162/+attachment/2696143/+files/test_simplescan_1.pdf -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/922162 Title: pdf output file is 6 times bigger than if created by simple-scan To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gscan2pdf/+bug/922162/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
Re: [Bug 922162] Re: pdf output file is 6 times bigger than if created by simple-scan
This depends heavily on the compression options you chose when saving the PDF, and whether you embedded OCR output. Please start with gscan2pdf --log=log save a PDF, close gscan2pdf, and post the log file. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/922162 Title: pdf output file is 6 times bigger than if created by simple-scan To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gscan2pdf/+bug/922162/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
