acquiring successive images
Posted: Thu Feb 04, 2010 6:56 am
Greetings,
My application needs to "listen" for scans. Each time the user inserts a check into the scanner (Fujitsu 6130 ADF) it should automatically start the scan and save the check to a file with a unique name.
Currently I use a timer with the native transfer mode:
I save the file and reset the timer in PostScan. Two problems -- 1) every 5 scans or so it takes over a minute for the scanner to scan, then the next scan it works fine; 2) there is a memory leak.
I would like to try AcquireModal, as it seems to be more appropriate, but I am confused as to whether it will "wait" for a document to be inserted in the scanner or if it will return an error if there is no document.
Could you provide me with a code snippet showing the preferred method for my needs? I do not need to display anything on screen and I do not want a UI. I tried setting the transfer format to File, but it will only create the first image and even though the scanner scans subsequent images, it never returned TRUE for FeederLoaded.
My application needs to "listen" for scans. Each time the user inserts a check into the scanner (Fujitsu 6130 ADF) it should automatically start the scan and save the check to a file with a unique name.
Currently I use a timer with the native transfer mode:
Code: Select all
procedure TfmCheckScan.tmFeederLoadedTimer(Sender: TObject);
begin
tmFeederLoaded.Enabled := False;
Application.ProcessMessages;
if VSTwain1.FeederLoaded = 1 then
VSTwain1.Acquire;
else
tmFeederLoaded.Enabled := True;
end;
I would like to try AcquireModal, as it seems to be more appropriate, but I am confused as to whether it will "wait" for a document to be inserted in the scanner or if it will return an error if there is no document.
Could you provide me with a code snippet showing the preferred method for my needs? I do not need to display anything on screen and I do not want a UI. I tried setting the transfer format to File, but it will only create the first image and even though the scanner scans subsequent images, it never returned TRUE for FeederLoaded.