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Dmitry Kurtaev
1c53fd3777
Consider QRCode ECI encoding #24426 ### Pull Request Readiness Checklist related: https://github.com/opencv/opencv/pull/24350#pullrequestreview-1661658421 1. Add `getEncoding` method to obtain ECI number 2. Add `detectAndDecodeBytes`, `decodeBytes`, `decodeBytesMulti`, `detectAndDecodeBytesMulti` methods in Python (return `bytes`) and Java (return `byte[]`) 3. Allow Python bytes to std::string conversion in general and add `encode(byte[] encoded_info, Mat qrcode)` in Java Python example with Kanji encoding: ```python img = cv.imread("test.png") detect = cv.QRCodeDetector() data, points, straight_qrcode = detect.detectAndDecodeBytes(img) print(data) print(detect.getEncoding(), cv.QRCodeEncoder_ECI_SHIFT_JIS) print(data.decode("shift-jis")) ``` ``` b'\x82\xb1\x82\xf1\x82\xc9\x82\xbf\x82\xcd\x90\xa2\x8aE' 20 20 こんにちは世界 ``` source: https://github.com/opencv/opencv/blob/ba4d6c859d21536f84e0328c16f4cc3e96bf3065/modules/objdetect/test/test_qrcode_encode.cpp#L332  See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [x] There is a reference to the original bug report and related work - [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [x] The feature is well documented and sample code can be built with the project CMake
87 lines
3.5 KiB
Python
87 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
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#!/usr/bin/env python
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'''
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===============================================================================
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QR code detect and decode pipeline.
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===============================================================================
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'''
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import os
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import numpy as np
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import cv2 as cv
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from tests_common import NewOpenCVTests, unittest
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class qrcode_detector_test(NewOpenCVTests):
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def test_detect(self):
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img = cv.imread(os.path.join(self.extraTestDataPath, 'cv/qrcode/link_ocv.jpg'))
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self.assertFalse(img is None)
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detector = cv.QRCodeDetector()
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retval, points = detector.detect(img)
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self.assertTrue(retval)
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self.assertEqual(points.shape, (1, 4, 2))
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def test_detect_and_decode(self):
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img = cv.imread(os.path.join(self.extraTestDataPath, 'cv/qrcode/link_ocv.jpg'))
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self.assertFalse(img is None)
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detector = cv.QRCodeDetector()
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retval, points, straight_qrcode = detector.detectAndDecode(img)
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self.assertEqual(retval, "https://opencv.org/")
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self.assertEqual(points.shape, (1, 4, 2))
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def test_detect_multi(self):
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img = cv.imread(os.path.join(self.extraTestDataPath, 'cv/qrcode/multiple/6_qrcodes.png'))
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self.assertFalse(img is None)
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detector = cv.QRCodeDetector()
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retval, points = detector.detectMulti(img)
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self.assertTrue(retval)
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self.assertEqual(points.shape, (6, 4, 2))
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def test_detect_and_decode_multi(self):
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img = cv.imread(os.path.join(self.extraTestDataPath, 'cv/qrcode/multiple/6_qrcodes.png'))
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self.assertFalse(img is None)
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detector = cv.QRCodeDetector()
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retval, decoded_data, points, straight_qrcode = detector.detectAndDecodeMulti(img)
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self.assertTrue(retval)
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self.assertEqual(len(decoded_data), 6)
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self.assertTrue("TWO STEPS FORWARD" in decoded_data)
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self.assertTrue("EXTRA" in decoded_data)
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self.assertTrue("SKIP" in decoded_data)
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self.assertTrue("STEP FORWARD" in decoded_data)
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self.assertTrue("STEP BACK" in decoded_data)
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self.assertTrue("QUESTION" in decoded_data)
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self.assertEqual(points.shape, (6, 4, 2))
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def test_decode_non_ascii(self):
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import sys
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if sys.version_info[0] < 3:
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raise unittest.SkipTest('Python 2.x is not supported')
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img = cv.imread(os.path.join(self.extraTestDataPath, 'cv/qrcode/umlaut.png'))
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self.assertFalse(img is None)
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detector = cv.QRCodeDetector()
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decoded_data, _, _ = detector.detectAndDecode(img)
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self.assertTrue(isinstance(decoded_data, str))
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self.assertTrue("Müllheimstrasse" in decoded_data)
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def test_kanji(self):
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inp = "こんにちは世界"
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inp_bytes = inp.encode("shift-jis")
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params = cv.QRCodeEncoder_Params()
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params.mode = cv.QRCodeEncoder_MODE_KANJI
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encoder = cv.QRCodeEncoder_create(params)
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qrcode = encoder.encode(inp_bytes)
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qrcode = cv.resize(qrcode, (0, 0), fx=2, fy=2, interpolation=cv.INTER_NEAREST)
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detector = cv.QRCodeDetector()
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data, _, _ = detector.detectAndDecodeBytes(qrcode)
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self.assertEqual(data, inp_bytes)
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self.assertEqual(detector.getEncoding(), cv.QRCodeEncoder_ECI_SHIFT_JIS)
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self.assertEqual(data.decode("shift-jis"), inp)
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_, data, _, _ = detector.detectAndDecodeBytesMulti(qrcode)
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self.assertEqual(data[0], inp_bytes)
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self.assertEqual(detector.getEncoding(0), cv.QRCodeEncoder_ECI_SHIFT_JIS)
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self.assertEqual(data[0].decode("shift-jis"), inp)
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