Web Demos

BARCODE READER SDK DEMO

Explore the flexibe barcode reading settings to optimize for your specific usage scenario.

WEB TWAIN SDK DEMO

Try the most popular web scanner features: scan images, import local images and PDF files, edit, save to local, upload to database, and etc.

BARCODE READER JAVASCRIPT DEMO

Transform any camera-equipped devices into real-time, browser-based barcode and QR code scanners.

MRZ SCANNER WEB DEMO

Detects the machine-readable zone of a passport, scans the text, and parses into human-readable data.

APP STORE DEMOS

BARCODE READER SDK FOR IOS

BARCODE READER SDK FOR ANDROID

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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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