@spike wrote:
Can anybody share any experience with doing compressed memory transfers? Quirks, pitfalls, etc.? The TWAIN 1.9 spec is pretty terse on this subject.
Can anybody suggest an under 1000$US scanner that supports compressed memory transfers, for testing and development?
How do you tell which values of ICAP_COMPRESSION apply to files, and which to memory transfers? I imagine that you set ICAP_XFERMECH to TWSX_MEMORY, and then query ICAP_COMPRESSION. But does that really work in practice?
The only thing I’d add is that many scanners that say they support compressed memory transfers, is that the compression is usually done in their DS – which tends to be poorly implemented. this translates to slow throughput. the better scanners, or high end, support on board compression.
regards,
wes