@zabanet wrote:
…is there any way to scan 58 cm (22.8 in) long sheets?
@gabe wrote:
…first check the ICAP_PHYSICALWIDTH/HEIGHT as in most cases this will be the max size supported by the device.
As gabe implied, maximum scan length is limited by the physical device or its TWAIN implementation. The TWAIN specification does allow for very long scans. A sheet-fed (roll?) scanner could do a 23 inch scan if the TWAIN developer chose to support that. The bad news is, the sheet-fed scanners I’ve worked with are constrained by their TWAIN DS to 14 inch scans. Your mileage may vary.
By the way, Dosadi has a handy free utility called Twister that reports ICAP_PHYSICALHEIGHT, ICAP_SUPPORTEDSIZES, etc.
They also provide TWAIN developer toolkits that you might find useful.
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