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refined QRCodeDetector API for OpenCV 4.0 (#13086)

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* refined QRCodeDetector API for OpenCV 4.0

* expanded and tested QRCodeDetector::detectAndDecode()
This commit is contained in:
Vadim Pisarevsky
2018-11-09 12:57:27 +03:00
committed by GitHub
parent 6fb780eae6
commit 8cdf7bb84b
5 changed files with 127 additions and 58 deletions
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samples/cpp/live_detect_qrcode.cpp
+14 -12
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@@ -86,6 +86,7 @@ int liveQRCodeDetect()
return -4;
}
QRCodeDetector qrcode;
TickMeter total;
for(;;)
{
@@ -97,11 +98,11 @@ int liveQRCodeDetect()
cvtColor(frame, src, COLOR_BGR2GRAY);
total.start();
bool result_detection = detectQRCode(src, transform);
bool result_detection = qrcode.detect(src, transform);
if (result_detection)
{
bool result_decode = decodeQRCode(src, transform, decode_info, straight_barcode);
if (result_decode) { cout << decode_info << '\n'; }
decode_info = qrcode.decode(src, transform, straight_barcode);
if (!decode_info.empty()) { cout << decode_info << '\n'; }
}
total.stop();
double fps = 1 / total.getTimeSec();
@@ -110,7 +111,7 @@ int liveQRCodeDetect()
if (result_detection) { getMatWithQRCodeContour(frame, transform); }
getMatWithFPS(frame, fps);
imshow("Live detect QR code", frame);
imshow("Live QR code detector", frame);
if( waitKey(30) > 0 ) { break; }
}
return 0;
@@ -119,33 +120,34 @@ int liveQRCodeDetect()
int showImageQRCodeDetect(string in, string out)
{
Mat src = imread(in, IMREAD_GRAYSCALE), straight_barcode;
string decode_info;
string decoded_info;
vector<Point> transform;
const int count_experiments = 10;
double transform_time = 0.0;
bool result_detection = false, result_decode = false;
bool result_detection = false;
TickMeter total;
QRCodeDetector qrcode;
for (size_t i = 0; i < count_experiments; i++)
{
total.start();
transform.clear();
result_detection = detectQRCode(src, transform);
result_detection = qrcode.detect(src, transform);
total.stop();
transform_time += total.getTimeSec();
total.reset();
if (!result_detection) { break; }
total.start();
result_decode = decodeQRCode(src, transform, decode_info, straight_barcode);
decoded_info = qrcode.decode(src, transform, straight_barcode);
total.stop();
transform_time += total.getTimeSec();
total.reset();
if (!result_decode) { break; }
if (decoded_info.empty()) { break; }
}
double fps = count_experiments / transform_time;
if (!result_detection) { cout << "Not find QR-code." << '\n'; return -2; }
if (!result_decode) { cout << "Not decode QR-code." << '\n'; return -3; }
if (!result_detection) { cout << "QR code not found\n"; return -2; }
if (decoded_info.empty()) { cout << "QR code cannot be decoded\n"; return -3; }
Mat color_src = imread(in);
getMatWithQRCodeContour(color_src, transform);
@@ -166,7 +168,7 @@ int showImageQRCodeDetect(string in, string out)
cout << "Output image file path: " << out << '\n';
cout << "Size: " << color_src.size() << '\n';
cout << "FPS: " << fps << '\n';
cout << "Decode info: " << decode_info << '\n';
cout << "Decoded info: " << decoded_info << '\n';
vector<int> compression_params;
compression_params.push_back(IMWRITE_PNG_COMPRESSION);