Hi, I think it's a bit simpler than that. The diagnostic software shows an "array" showing the marked boxes. Here's what I get form the diagnostic software when I scan a slip:
Please select: Ticket count: 1 ticket data len=52 <..> 1 2 3 4 5 6 7 8 9 0 A B C D <..> 1 2 3 4 5 6 7 8 9 0 A B C D < 1> * * * . . . . . * . * * . <21> . . . . . . . . . . . . . < 2> . . . . . . . . . . . . . <22> . . . . . . . . . . . . . < 3> . * . . . . . . . . . . . <23> . . . . . . . . . . . . . < 4> . . . . . . . . . . . . . <24> . . . . . . . . . . . . . < 5> . . . . . . . . . . . . . <25> . . . . . . . . . . . . . < 6> . . . . . . . . . . . . . <26> . . . . . . . . . . . . . < 7> . . . . . . . . . . . . . < 8> . . . . . . . . . . . . . < 9> . . . . . . . . . . . . . <10> . . . . . . . . . . . . . <11> . . . . . . . . . . . . . <12> . . . . . . . . . . . . . <13> . . . . . . . . . . . . . <14> . . . . . . . . . . . . . <15> . . . . . . . . . . . . . <16> . . . . . . . . . . . . . <17> . . . . . . . . . . . . . <18> . . . . . . . . . . . . . <19> . . . . . . . . . . . . . <20> . . . . . . . . . . . . . So I only have to worry about getting this data - not downloading an image and then extracting the mark information. Thanks, Dan 2008/7/30 m. allan noah <kitno455 at gmail.com>: > i have quite a bit of omr experience, and have done a bit with rs232 > in the past, but never scanners. do your logs show the actual data > being passed? if so, i think your first effort should be to extract > image from logs. > > allan > > On 7/30/08, Dan Scott <danieljamesscott at gmail.com> wrote: >> Hi, >> >> I'm working on getting a RS232 scanner working on Linux. I see that >> Sane has some support for serial port scanners but not much. The >> scanner is attached to a POS system for retail sales and runs RHEL5. >> >> Unfortunately, I have no documentation for the scanner, I'm not even >> sure of the brand. There's a logo on the front which is 'G' followed >> by a globe symbol, followed by 'T' so it could be 'GOT' or 'GT'. There >> does not appear to be a model number although there is an >> identification place which is written in Chinese. >> >> I have a compiled diagnostic application (no source code) which can >> control the scanner and I have tried logging the system calls using >> the 'ltrace' command, so that I can figure out the protocol. I have >> tried writing a program to mimic the diagnostic application which >> sends the same commands to the serial port but the scanner does not >> respond. >> >> Does anyone have any expertise in RS232 scanner protocols? All my >> searching on the web reveals results for barcode scanners which appear >> to work very differently from image scanners. >> >> As a final note, I am trying to use the scanner for OMR - the >> diagnostic application returns an array of data relating to the marks >> entered on a slip of paper - if that is any use. Also, I can attach >> the log file of system calls made by the diagnostic application if >> that will help anyone. >> >> Any help would be greatly appreciated. >> >> Thanks, >> >> Dan Scott >> >> >> -- >> sane-devel mailing list: sane-devel at lists.alioth.debian.org >> http://lists.alioth.debian.org/mailman/listinfo/sane-devel >> Unsubscribe: Send mail with subject "unsubscribe your_password" >> to sane-devel-request at lists.alioth.debian.org >> > > > -- > "The truth is an offense, but not a sin" >
