decode-region.py

from dbr import *
 
# Initialize Dynamsoft Barcode Reader
reader = BarcodeReader()
# Apply for a trial license: https://www.dynamsoft.com/customer/license/trialLicense
license_key = "LICENSE KEY"
reader.init_license(license_key)
 
def decodeframe(frame, left, top, right, bottom):
    settings = reader.reset_runtime_settings() 
    settings = reader.get_runtime_settings()
    settings.region_bottom  = bottom
    settings.region_left    = left
    settings.region_right   = right
    settings.region_top     = top
    settings.barcode_format_ids = EnumBarcodeFormat.BF_QR_CODE
    settings.expected_barcodes_count = 1
    reader.update_runtime_settings(settings)
 
    try:
        text_results = reader.decode_buffer(frame)
        if text_results != None:
            return text_results[0]
    except BarcodeReaderError as bre:
        print(bre)
 
    return None