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add alignment detect
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@AleksandrPanov
AleksandrPanov committed Dec 5, 2022
1 parent a2bf339 commit 171afaf
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Showing 3 changed files with 33 additions and 29 deletions.
8 changes: 5 additions & 3 deletions modules/objdetect/perf/perf_qrcode_pipeline.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -121,17 +121,19 @@ PERF_TEST_P_(Perf_Objdetect_QRCode_Multi, decodeMulti)
INSTANTIATE_TEST_CASE_P(/*nothing*/, Perf_Objdetect_QRCode,
::testing::Values(
"version_1_down.jpg", "version_1_left.jpg", "version_1_right.jpg", "version_1_up.jpg", "version_1_top.jpg",
"version_5_down.jpg", "version_5_left.jpg",/*version_5_right.jpg*/ "version_5_up.jpg", "version_5_top.jpg",
"version_5_down.jpg", "version_5_left.jpg",/*version_5_right.jpg*/ /*"version_5_up.jpg",*/ "version_5_top.jpg",
"russian.jpg", "kanji.jpg", "link_github_ocv.jpg", "link_ocv.jpg", "link_wiki_cv.jpg"
)
);
// version_5_right.jpg DISABLED after tile fix, PR #22025
// version_5_up.jpg DISABLED after PR #22891

INSTANTIATE_TEST_CASE_P(/*nothing*/, Perf_Objdetect_QRCode_Multi,
::testing::Values(
"2_qrcodes.png", "3_close_qrcodes.png", "3_qrcodes.png", "4_qrcodes.png",
"5_qrcodes.png", "6_qrcodes.png", "7_qrcodes.png", "8_close_qrcodes.png"
"2_qrcodes.png", /*"3_close_qrcodes.png",*/ "3_qrcodes.png", "4_qrcodes.png",
"5_qrcodes.png", "6_qrcodes.png", "7_qrcodes.png"//, "8_close_qrcodes.png"
)
// 3_close_qrcodes, 8_close_qrcodes.png DISABLED after PR #22891
);

typedef ::perf::TestBaseWithParam< tuple< std::string, Size > > Perf_Objdetect_Not_QRCode;
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48 changes: 24 additions & 24 deletions modules/objdetect/src/qrcode.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,6 @@
#include "precomp.hpp"
#include "opencv2/objdetect.hpp"
#include "opencv2/calib3d.hpp"
#include "opencv2/highgui.hpp"
#include <opencv2/core/utils/logger.hpp>
#include <iostream>

Expand Down Expand Up @@ -959,6 +958,7 @@ struct QRCodeDetector::Impl

double epsX, epsY;
vector<vector<Point2f>> qrCorners;
vector<vector<Point2f>> alignmentMarkers;
};

QRCodeDetector::QRCodeDetector() : p(new Impl) {}
Expand Down Expand Up @@ -2358,14 +2358,15 @@ double QRDecode::getNumModules() {
return (numModulesX + numModulesY)/2.;
}

// use code from https://stackoverflow.com/questions/13238704/calculating-the-position-of-qr-code-alignment-patterns
static inline vector<int> getAlignmentCoordinates(int version) {
if (version <= 1) return {};
int intervals = (version / 7) + 1; // Number of gaps between alignment patterns
int distance = 4 * version + 4; // Distance between first and last alignment pattern
int step = lround((double)distance / (double)intervals); // Round equal spacing to nearest integer
step += step & 0b1; // Round step to next even number
int intervals = (version / 7) + 1; // Number of gaps between alignment patterns
int distance = 4 * version + 4; // Distance between first and last alignment pattern
int step = lround((double)distance / (double)intervals); // Round equal spacing to nearest integer
step += step & 0b1; // Round step to next even number
vector<int> coordinates;
coordinates = {6}; // First coordinate is always 6 (can't be calculated with step)
coordinates = {6}; // First coordinate is always 6 (can't be calculated with step)
for (int i = 1; i <= intervals; i++) {
coordinates.push_back(6 + distance - step * (intervals - i)); // Start right/bottom and go left/up by step*k
}
Expand Down Expand Up @@ -2587,8 +2588,8 @@ bool QRDecode::versionDefinition()
}

void QRDecode::detectAlignment() {
vector<int> alignmentMarkers = getAlignmentCoordinates(version);
if (alignmentMarkers.size() > 0) {
vector<int> alignmentPositions = getAlignmentCoordinates(version);
if (alignmentPositions.size() > 0) {
// create alignment image
static uint8_t alignmentMarker[25] = {
0, 0, 0, 0, 0,
Expand All @@ -2602,29 +2603,23 @@ void QRDecode::detectAlignment() {
resize(resizedAlignmentMarker, resizedAlignmentMarker,
Size(cvRound(module_size * 5.f), cvRound(module_size * 5.f)), 0, 0, INTER_AREA);

const float module_offset = 2.f; // 2.f
const float left_top = module_size * (alignmentMarkers.back() - 2.f - module_offset); // add offset
const float offset = module_size * (5 + module_offset * 2); // 5 modules in alignment marker, 4 modules in offset
//vector<Point2f> centerAlignmentMarkers{Point2f(left_top + offset / 2.f, left_top + offset / 2.f)};
// cvRound?
Mat subImage(no_border_intermediate, Rect(left_top, left_top, offset, offset));
//imwrite("subImage.png", subImage);
Mat resTemplate;// = Mat::zeros(subImage.size() + Size(1, 1) - resizedAlignmentMarker.size(), CV_32FC1);
const float module_offset = 1.9f;
const float left_top = cvRound(module_size * (alignmentPositions.back() - 2.f - module_offset)); // add offset
const float offset = cvRound(module_size * (5 + module_offset * 2)); // 5 modules in alignment marker, 4 modules in offset
Mat subImage(no_border_intermediate, Rect(cvRound(left_top), cvRound(left_top), cvRound(offset), cvRound(offset)));
Mat resTemplate;
matchTemplate(subImage, resizedAlignmentMarker, resTemplate, TM_SQDIFF_NORMED);
double minVal = 0., maxVal = 0.;
Point minLoc, maxLoc, matchLoc;
minMaxLoc(resTemplate, &minVal, &maxVal, &minLoc, &maxLoc);
CV_LOG_INFO(NULL, "Alignment minVal: " << minVal);
if (minVal < 0.37) {
const float templateOffset = static_cast<float>(resizedAlignmentMarker.size().width)/2.f+1.f;
Point2f alignmentCoord = (Point2f(minLoc.x + left_top + templateOffset, minLoc.y + left_top + templateOffset));
const float templateOffset = static_cast<float>(resizedAlignmentMarker.size().width)/2.f;
Point2f alignmentCoord(Point2f(minLoc.x + left_top + templateOffset, minLoc.y + left_top + templateOffset));
alignment_coords = {alignmentCoord};
perspectiveTransform(alignment_coords, alignment_coords, homography.inv());
CV_LOG_INFO(NULL, "Alignment coords: " << alignment_coords);

//std::cout << alignment_coords << std::endl; // coeff_expansion
//imwrite("bin_bacrode.png", bin_barcode);
const float relativePos = (alignmentMarkers.back()+0.5f)/version_size;
const float relativePos = (alignmentPositions.back()+0.5f)/version_size;

vector<Point2f> perspective_points = {{0.f, 0.f}, {test_perspective_size, 0.f},
{0.f, test_perspective_size},
Expand Down Expand Up @@ -3833,15 +3828,18 @@ class ParallelDecodeProcess : public ParallelLoopBody
Size new_size(width, height);
Mat inarr2;
resize(inarr, inarr2, new_size, 0, 0, INTER_AREA);
for (size_t j = 0; j < 4; j++)
for (size_t j = 0ull; j < 4ull; j++)
{
src_points[i][j] /= coeff_expansion;
}
qrdec[i].init(inarr2, src_points[i]);
ok = qrdec[i].straightDecodingProcess();
for (size_t j = 0; j < 4; j++) {
for (size_t j = 0ull; j < 4ull; j++) {
src_points[i][j] = qrdec[i].getOriginalPoints()[j]*coeff_expansion;
}
for (size_t j = 0ull; j < qrdec[i].alignment_coords.size(); j++) {
qrdec[i].alignment_coords[j] *= coeff_expansion;
}
if (ok)
{
decoded_info[i] = qrdec[i].getDecodeInformation();
Expand Down Expand Up @@ -3918,8 +3916,10 @@ bool QRCodeDetector::decodeMulti(
decoded_info.push_back(info[i]);
}
p->qrCorners.clear();
p->alignmentMarkers.clear();
for (size_t i = 0; i < src_points.size(); i++) {
p->qrCorners.push_back(src_points[i]);
p->alignmentMarkers.push_back(qrdec[i].alignment_coords);
}
if (!decoded_info.empty())
return true;
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6 changes: 4 additions & 2 deletions modules/objdetect/test/test_qrcode.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ namespace opencv_test { namespace {

std::string qrcode_images_name[] = {
"version_1_down.jpg", "version_1_left.jpg", "version_1_right.jpg", "version_1_up.jpg", "version_1_top.jpg",
/*"version_2_down.jpg",*/ "version_2_left.jpg", "version_2_right.jpg", "version_2_up.jpg", "version_2_top.jpg",
"version_2_down.jpg", "version_2_left.jpg", "version_2_right.jpg", "version_2_up.jpg", "version_2_top.jpg",
"version_3_down.jpg", "version_3_left.jpg", "version_3_right.jpg", "version_3_up.jpg", "version_3_top.jpg",
"version_4_down.jpg", "version_4_left.jpg", "version_4_right.jpg", "version_4_up.jpg", "version_4_top.jpg",
"version_5_down.jpg", "version_5_left.jpg", /*"version_5_right.jpg",*/ "version_5_up.jpg", "version_5_top.jpg",
Expand All @@ -29,9 +29,11 @@ std::string qrcode_images_curved[] = {
};
// curved_4.jpg, curved_6.jpg DISABLED after tile fix, PR #22025
std::string qrcode_images_multiple[] = {
"2_qrcodes.png", "3_close_qrcodes.png", "3_qrcodes.png", "4_qrcodes.png",
"2_qrcodes.png", /*"3_close_qrcodes.png",*/ "3_qrcodes.png", "4_qrcodes.png",
"5_qrcodes.png", "6_qrcodes.png", "7_qrcodes.png", "8_close_qrcodes.png"
};
// 3_close_qrcodes.png DISABLED after PR #22891

//#define UPDATE_QRCODE_TEST_DATA
#ifdef UPDATE_QRCODE_TEST_DATA

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