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📇 Official Card Auto-Capture

The same auto-capture engine handles other official Thai documents: driver licenses, bank passbooks (book bank), and ID card copies with signature. The SDK detects the document boundary, waits for a sharp stable frame, perspective-corrects the crop, and submits it to the matching iApp OCR API — 1.0–1.25 IC per page depending on the document type.

Supported document types​

DocumentType (Flutter)documentType (Web)API calledCost
DocumentType.thaiDriverLicense'thaiDriverLicense'Thai Driver License OCR1.25 IC/page
DocumentType.bookBank'bookBank'Book Bank OCR1.25 IC/page
DocumentType.thaiIdWithSignature'thaiIdWithSignature'Thai National ID Card with Signature1.0 IC/page

Flutter​

import 'package:iapp_ekyc_sdk/iapp_ekyc_sdk.dart';

final client = IappEkycClient(apiKey: 'YOUR_API_KEY');

// Thai driver license
final license = await DocumentCaptureView.start(
  context,
  client: client,
  documentType: DocumentType.thaiDriverLicense,
  locale: EkycLocale.th,
);

// Bank passbook
final bookBank = await DocumentCaptureView.start(
  context,
  client: client,
  documentType: DocumentType.bookBank,
);

Web​

import { IappEkyc } from '@iapp-technology/ekyc-sdk';

const ekyc = new IappEkyc({ apiKey: 'YOUR_API_KEY' });

const license = await ekyc.captureDocument({
  mount: document.getElementById('ekyc-mount'),
  documentType: 'thaiDriverLicense',
  locale: 'th',
});

const idCopy = await ekyc.captureDocument({
  mount: document.getElementById('ekyc-mount'),
  documentType: 'thaiIdWithSignature',
});

How auto-capture works​

  • Boundary detection — adaptive Canny edge detection and contour analysis (OpenCV) find a convex quadrilateral matching the ID-1 card aspect ratio (1.586, ±0.25 tolerance) inside the on-screen guide — driver licenses, bank books, and ID copies all share the ID-1 geometry.
  • Stability — capture only triggers after the document has been steady across a sliding window of recent frames (corner drift under 2% of the frame diagonal).
  • Sharpness — Laplacian-variance scoring rejects blurry frames before any credit is spent.
  • Perspective correction — the detected corners are warped to a flat ~300 DPI image (1011 × 637 px) before upload.
  • Manual fallback — a manual shutter button appears after 10 seconds if auto-capture has not fired.

Learn more​