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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Table of contents

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ErrorCallBack

An abstract class that contains an abstract method error_callback_func.

class ErrorCallBack(ABC)

Abstract Method

error_callback_func

Sets callback function to process errors which is triggered when the library finishes decoding a frame. You need to implement it in the subclass.

Parameters
[in] frame_id <int> : The ID of the frame.
[in] error <int> : Error code generated when decoding the frame.
[in] user_data <object> : Customized arguments passed to your function.

ErrorCallBack.error_callback_func(frame_id, error, user_data)

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