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We are currently using Lead tools VC++ implementation that follows TWAIN specifications to scan check images with flatbed scanners compliant with TWAIN 1.9 specifications.
We are seeing that certain checks scanned using Lexmark brand flatbed scanners are very heavy (> 100 KB) and are not acceptable due to SLA standards. The same check scanned using other flatbed scanners including HP, Canon and Epson give good results (less than 40 KB).
However, there are many other checks that are scanned with acceptable image size by Lexmark scanners.
We are using CCITT Group4 compression and store the images in TIFF format.
Does anyone know what can be done to resolve this issue ?This isn’t a solution, more of a thought. How big are the files for ‘those checks’ when you scan them in with the software that came with the scanner? Just thinking that the vendor’s software usually has an advantage over yours as they have access to the custom capability information that I usually find difficicult to obtain. Does leadtools offer support for custom capability negotiation?
Do yout set the capabilities one-by-one or are you using customDsData?Could it be that these checks just don’t compress well? It seems to me that if the scanners is picking up the watermark or other fine detail that regardless of your compresion they won’t compress as well as if the scanner wasn’t, but I’m going to guess that you’ve already checked that you’re scanning in with the same dpi, using the same units and whatnot. Have you posted this question to leadtools support?
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