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Capture/Image Source

Is there a limit on the number of pages I can scan at a time? Where do you store them after scanning?

Dynamic Web TWAIN Desktop Service edition allows you to scan unlimited number of pages from a physical document scanner. The Desktop Service edition can run in 32-bit and 64-bit and the data is stored raw in DIB format. Starting from version 15.0, 64-bit has been made the default option on a 64-bit OS and that means there is no limitation on how much memory it can use. However, physical memory size is usually limited so a good practice is to store images to memory by default and temporarily cache some images to the local disk when the used memory size exceeds a specific value (e.g. 800MB).

Note the disk caching feature is turned on by default and you can change the setting by using the following APIs

On the other hand, if you are using the WebAssembly edition of Dynamic Web TWAIN, you can only utilize up to 2 GB of memory as WebAssembly only supports 32-bit pointers at present. However, the WebAssembly edition is mainly for document capturing from webcams/mobile cameras so it is less likely one would scan hundreds of pages at a time. Also, all captured pages are saved in buffer in JPEG format which won’t take much space.

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