1
0
mirror of https://github.com/opencv/opencv.git synced 2026-07-25 13:23:02 +04:00

Merge pull request #23018 from stopmosk:move-aruco-tutorial

Move Aruco tutorials and samples to main repo #23018

merge with https://github.com/opencv/opencv_contrib/pull/3401
merge with https://github.com/opencv/opencv_extra/pull/1143

### Pull Request Readiness Checklist

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
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

---------
Co-authored-by: AleksandrPanov <alexander.panov@xperience.ai>
Co-authored-by: Alexander Smorkalov <alexander.smorkalov@xperience.ai>
This commit is contained in:
Sergei Shutov
2024-02-26 13:57:46 +02:00
committed by GitHub
parent faba2d8148
commit 6ca45a9d33
32 changed files with 1564 additions and 2 deletions
@@ -0,0 +1,48 @@
#include <opencv2/highgui.hpp>
#include <opencv2/objdetect/aruco_detector.hpp>
#include <opencv2/calib3d.hpp>
#include <ctime>
namespace {
inline static bool readCameraParameters(const std::string& filename, cv::Mat &camMatrix, cv::Mat &distCoeffs) {
cv::FileStorage fs(filename, cv::FileStorage::READ);
if (!fs.isOpened())
return false;
fs["camera_matrix"] >> camMatrix;
fs["distortion_coefficients"] >> distCoeffs;
return true;
}
inline static bool saveCameraParams(const std::string &filename, cv::Size imageSize, float aspectRatio, int flags,
const cv::Mat &cameraMatrix, const cv::Mat &distCoeffs, double totalAvgErr) {
cv::FileStorage fs(filename, cv::FileStorage::WRITE);
if (!fs.isOpened())
return false;
time_t tt;
time(&tt);
struct tm *t2 = localtime(&tt);
char buf[1024];
strftime(buf, sizeof(buf) - 1, "%c", t2);
fs << "calibration_time" << buf;
fs << "image_width" << imageSize.width;
fs << "image_height" << imageSize.height;
if (flags & cv::CALIB_FIX_ASPECT_RATIO) fs << "aspectRatio" << aspectRatio;
if (flags != 0) {
sprintf(buf, "flags: %s%s%s%s",
flags & cv::CALIB_USE_INTRINSIC_GUESS ? "+use_intrinsic_guess" : "",
flags & cv::CALIB_FIX_ASPECT_RATIO ? "+fix_aspectRatio" : "",
flags & cv::CALIB_FIX_PRINCIPAL_POINT ? "+fix_principal_point" : "",
flags & cv::CALIB_ZERO_TANGENT_DIST ? "+zero_tangent_dist" : "");
}
fs << "flags" << flags;
fs << "camera_matrix" << cameraMatrix;
fs << "distortion_coefficients" << distCoeffs;
fs << "avg_reprojection_error" << totalAvgErr;
return true;
}
}
@@ -0,0 +1,95 @@
#include <opencv2/highgui.hpp>
#include <opencv2/objdetect/aruco_detector.hpp>
#include <iostream>
#include "aruco_samples_utility.hpp"
using namespace cv;
namespace {
const char* about = "Create an ArUco grid board image";
const char* keys =
"{@outfile |<none> | Output image }"
"{w | | Number of markers in X direction }"
"{h | | Number of markers in Y direction }"
"{l | | Marker side length (in pixels) }"
"{s | | Separation between two consecutive markers in the grid (in pixels)}"
"{d | | dictionary: DICT_4X4_50=0, DICT_4X4_100=1, DICT_4X4_250=2,"
"DICT_4X4_1000=3, DICT_5X5_50=4, DICT_5X5_100=5, DICT_5X5_250=6, DICT_5X5_1000=7, "
"DICT_6X6_50=8, DICT_6X6_100=9, DICT_6X6_250=10, DICT_6X6_1000=11, DICT_7X7_50=12,"
"DICT_7X7_100=13, DICT_7X7_250=14, DICT_7X7_1000=15, DICT_ARUCO_ORIGINAL = 16}"
"{cd | | Input file with custom dictionary }"
"{m | | Margins size (in pixels). Default is marker separation (-s) }"
"{bb | 1 | Number of bits in marker borders }"
"{si | false | show generated image }";
}
int main(int argc, char *argv[]) {
CommandLineParser parser(argc, argv, keys);
parser.about(about);
if(argc < 7) {
parser.printMessage();
return 0;
}
int markersX = parser.get<int>("w");
int markersY = parser.get<int>("h");
int markerLength = parser.get<int>("l");
int markerSeparation = parser.get<int>("s");
int margins = markerSeparation;
if(parser.has("m")) {
margins = parser.get<int>("m");
}
int borderBits = parser.get<int>("bb");
bool showImage = parser.get<bool>("si");
String out = parser.get<String>(0);
if(!parser.check()) {
parser.printErrors();
return 0;
}
Size imageSize;
imageSize.width = markersX * (markerLength + markerSeparation) - markerSeparation + 2 * margins;
imageSize.height =
markersY * (markerLength + markerSeparation) - markerSeparation + 2 * margins;
aruco::Dictionary dictionary = aruco::getPredefinedDictionary(cv::aruco::DICT_4X4_50);
if (parser.has("d")) {
int dictionaryId = parser.get<int>("d");
dictionary = aruco::getPredefinedDictionary(aruco::PredefinedDictionaryType(dictionaryId));
}
else if (parser.has("cd")) {
FileStorage fs(parser.get<std::string>("cd"), FileStorage::READ);
bool readOk = dictionary.readDictionary(fs.root());
if(!readOk)
{
std::cerr << "Invalid dictionary file" << std::endl;
return 0;
}
}
else {
std::cerr << "Dictionary not specified" << std::endl;
return 0;
}
aruco::GridBoard board(Size(markersX, markersY), float(markerLength), float(markerSeparation), dictionary);
// show created board
//! [aruco_generate_board_image]
Mat boardImage;
board.generateImage(imageSize, boardImage, margins, borderBits);
//! [aruco_generate_board_image]
if(showImage) {
imshow("board", boardImage);
waitKey(0);
}
imwrite(out, boardImage);
return 0;
}
@@ -0,0 +1,77 @@
#include <opencv2/highgui.hpp>
#include <opencv2/objdetect/aruco_detector.hpp>
#include <iostream>
#include "aruco_samples_utility.hpp"
using namespace cv;
namespace {
const char* about = "Create an ArUco marker image";
//! [aruco_create_markers_keys]
const char* keys =
"{@outfile |<none> | Output image }"
"{d | | dictionary: DICT_4X4_50=0, DICT_4X4_100=1, DICT_4X4_250=2,"
"DICT_4X4_1000=3, DICT_5X5_50=4, DICT_5X5_100=5, DICT_5X5_250=6, DICT_5X5_1000=7, "
"DICT_6X6_50=8, DICT_6X6_100=9, DICT_6X6_250=10, DICT_6X6_1000=11, DICT_7X7_50=12,"
"DICT_7X7_100=13, DICT_7X7_250=14, DICT_7X7_1000=15, DICT_ARUCO_ORIGINAL = 16}"
"{cd | | Input file with custom dictionary }"
"{id | | Marker id in the dictionary }"
"{ms | 200 | Marker size in pixels }"
"{bb | 1 | Number of bits in marker borders }"
"{si | false | show generated image }";
}
//! [aruco_create_markers_keys]
int main(int argc, char *argv[]) {
CommandLineParser parser(argc, argv, keys);
parser.about(about);
if(argc < 4) {
parser.printMessage();
return 0;
}
int markerId = parser.get<int>("id");
int borderBits = parser.get<int>("bb");
int markerSize = parser.get<int>("ms");
bool showImage = parser.get<bool>("si");
String out = parser.get<String>(0);
if(!parser.check()) {
parser.printErrors();
return 0;
}
aruco::Dictionary dictionary = aruco::getPredefinedDictionary(cv::aruco::DICT_4X4_50);
if (parser.has("d")) {
int dictionaryId = parser.get<int>("d");
dictionary = aruco::getPredefinedDictionary(aruco::PredefinedDictionaryType(dictionaryId));
}
else if (parser.has("cd")) {
FileStorage fs(parser.get<std::string>("cd"), FileStorage::READ);
bool readOk = dictionary.readDictionary(fs.root());
if(!readOk) {
std::cerr << "Invalid dictionary file" << std::endl;
return 0;
}
}
else {
std::cerr << "Dictionary not specified" << std::endl;
return 0;
}
Mat markerImg;
aruco::generateImageMarker(dictionary, markerId, markerSize, markerImg, borderBits);
if(showImage) {
imshow("marker", markerImg);
waitKey(0);
}
imwrite(out, markerImg);
return 0;
}
@@ -0,0 +1,201 @@
#include <iostream>
#include <vector>
#include <opencv2/highgui.hpp>
#include <opencv2/objdetect/aruco_detector.hpp>
#include "aruco_samples_utility.hpp"
using namespace std;
using namespace cv;
namespace {
const char* about = "Pose estimation using a ArUco Planar Grid board";
//! [aruco_detect_board_keys]
const char* keys =
"{w | | Number of squares in X direction }"
"{h | | Number of squares in Y direction }"
"{l | | Marker side length (in pixels) }"
"{s | | Separation between two consecutive markers in the grid (in pixels)}"
"{d | | dictionary: DICT_4X4_50=0, DICT_4X4_100=1, DICT_4X4_250=2,"
"DICT_4X4_1000=3, DICT_5X5_50=4, DICT_5X5_100=5, DICT_5X5_250=6, DICT_5X5_1000=7, "
"DICT_6X6_50=8, DICT_6X6_100=9, DICT_6X6_250=10, DICT_6X6_1000=11, DICT_7X7_50=12,"
"DICT_7X7_100=13, DICT_7X7_250=14, DICT_7X7_1000=15, DICT_ARUCO_ORIGINAL = 16}"
"{cd | | Input file with custom dictionary }"
"{c | | Output file with calibrated camera parameters }"
"{v | | Input from video or image file, if omitted, input comes from camera }"
"{ci | 0 | Camera id if input doesnt come from video (-v) }"
"{dp | | File of marker detector parameters }"
"{rs | | Apply refind strategy }"
"{r | | show rejected candidates too }";
}
//! [aruco_detect_board_keys]
static void readDetectorParamsFromCommandLine(CommandLineParser &parser, aruco::DetectorParameters& detectorParams) {
if(parser.has("dp")) {
FileStorage fs(parser.get<string>("dp"), FileStorage::READ);
bool readOk = detectorParams.readDetectorParameters(fs.root());
if(!readOk) {
cerr << "Invalid detector parameters file" << endl;
throw -1;
}
}
}
static void readCameraParamsFromCommandLine(CommandLineParser &parser, Mat& camMatrix, Mat& distCoeffs) {
if(parser.has("c")) {
bool readOk = readCameraParameters(parser.get<string>("c"), camMatrix, distCoeffs);
if(!readOk) {
cerr << "Invalid camera file" << endl;
throw -1;
}
}
}
static void readDictionatyFromCommandLine(CommandLineParser &parser, aruco::Dictionary& dictionary) {
if (parser.has("d")) {
int dictionaryId = parser.get<int>("d");
dictionary = aruco::getPredefinedDictionary(aruco::PredefinedDictionaryType(dictionaryId));
}
else if (parser.has("cd")) {
FileStorage fs(parser.get<string>("cd"), FileStorage::READ);
bool readOk = dictionary.readDictionary(fs.root());
if(!readOk) {
cerr << "Invalid dictionary file" << endl;
throw -1;
}
}
else {
cerr << "Dictionary not specified" << endl;
throw -1;
}
}
int main(int argc, char *argv[]) {
CommandLineParser parser(argc, argv, keys);
parser.about(about);
if(argc < 7) {
parser.printMessage();
return 0;
}
//! [aruco_detect_board_full_sample]
int markersX = parser.get<int>("w");
int markersY = parser.get<int>("h");
float markerLength = parser.get<float>("l");
float markerSeparation = parser.get<float>("s");
bool showRejected = parser.has("r");
bool refindStrategy = parser.has("rs");
int camId = parser.get<int>("ci");
Mat camMatrix, distCoeffs;
readCameraParamsFromCommandLine(parser, camMatrix, distCoeffs);
aruco::DetectorParameters detectorParams;
detectorParams.cornerRefinementMethod = aruco::CORNER_REFINE_SUBPIX; // do corner refinement in markers
readDetectorParamsFromCommandLine(parser, detectorParams);
String video;
if(parser.has("v")) {
video = parser.get<String>("v");
}
if(!parser.check()) {
parser.printErrors();
return 0;
}
aruco::Dictionary dictionary = aruco::getPredefinedDictionary(cv::aruco::DICT_4X4_50);
readDictionatyFromCommandLine(parser, dictionary);
aruco::ArucoDetector detector(dictionary, detectorParams);
VideoCapture inputVideo;
int waitTime;
if(!video.empty()) {
inputVideo.open(video);
waitTime = 0;
} else {
inputVideo.open(camId);
waitTime = 10;
}
float axisLength = 0.5f * ((float)min(markersX, markersY) * (markerLength + markerSeparation) +
markerSeparation);
// Create GridBoard object
//! [aruco_create_board]
aruco::GridBoard board(Size(markersX, markersY), markerLength, markerSeparation, dictionary);
//! [aruco_create_board]
// Also you could create Board object
//vector<vector<Point3f> > objPoints; // array of object points of all the marker corners in the board
//vector<int> ids; // vector of the identifiers of the markers in the board
//aruco::Board board(objPoints, dictionary, ids);
double totalTime = 0;
int totalIterations = 0;
while(inputVideo.grab()) {
Mat image, imageCopy;
inputVideo.retrieve(image);
double tick = (double)getTickCount();
vector<int> ids;
vector<vector<Point2f>> corners, rejected;
Vec3d rvec, tvec;
//! [aruco_detect_and_refine]
// Detect markers
detector.detectMarkers(image, corners, ids, rejected);
// Refind strategy to detect more markers
if(refindStrategy)
detector.refineDetectedMarkers(image, board, corners, ids, rejected, camMatrix,
distCoeffs);
//! [aruco_detect_and_refine]
// Estimate board pose
int markersOfBoardDetected = 0;
if(!ids.empty()) {
// Get object and image points for the solvePnP function
cv::Mat objPoints, imgPoints;
board.matchImagePoints(corners, ids, objPoints, imgPoints);
// Find pose
cv::solvePnP(objPoints, imgPoints, camMatrix, distCoeffs, rvec, tvec);
markersOfBoardDetected = (int)objPoints.total() / 4;
}
double currentTime = ((double)getTickCount() - tick) / getTickFrequency();
totalTime += currentTime;
totalIterations++;
if(totalIterations % 30 == 0) {
cout << "Detection Time = " << currentTime * 1000 << " ms "
<< "(Mean = " << 1000 * totalTime / double(totalIterations) << " ms)" << endl;
}
// Draw results
image.copyTo(imageCopy);
if(!ids.empty()) {
aruco::drawDetectedMarkers(imageCopy, corners, ids);
}
if(showRejected && !rejected.empty())
aruco::drawDetectedMarkers(imageCopy, rejected, noArray(), Scalar(100, 0, 255));
if(markersOfBoardDetected > 0)
cv::drawFrameAxes(imageCopy, camMatrix, distCoeffs, rvec, tvec, axisLength);
imshow("out", imageCopy);
char key = (char)waitKey(waitTime);
if(key == 27) break;
//! [aruco_detect_board_full_sample]
}
return 0;
}
@@ -0,0 +1,177 @@
#include <opencv2/highgui.hpp>
#include <opencv2/objdetect/aruco_detector.hpp>
#include <iostream>
#include "aruco_samples_utility.hpp"
using namespace std;
using namespace cv;
namespace {
const char* about = "Basic marker detection";
//! [aruco_detect_markers_keys]
const char* keys =
"{d | | dictionary: DICT_4X4_50=0, DICT_4X4_100=1, DICT_4X4_250=2,"
"DICT_4X4_1000=3, DICT_5X5_50=4, DICT_5X5_100=5, DICT_5X5_250=6, DICT_5X5_1000=7, "
"DICT_6X6_50=8, DICT_6X6_100=9, DICT_6X6_250=10, DICT_6X6_1000=11, DICT_7X7_50=12,"
"DICT_7X7_100=13, DICT_7X7_250=14, DICT_7X7_1000=15, DICT_ARUCO_ORIGINAL = 16,"
"DICT_APRILTAG_16h5=17, DICT_APRILTAG_25h9=18, DICT_APRILTAG_36h10=19, DICT_APRILTAG_36h11=20}"
"{cd | | Input file with custom dictionary }"
"{v | | Input from video or image file, if ommited, input comes from camera }"
"{ci | 0 | Camera id if input doesnt come from video (-v) }"
"{c | | Camera intrinsic parameters. Needed for camera pose }"
"{l | 0.1 | Marker side length (in meters). Needed for correct scale in camera pose }"
"{dp | | File of marker detector parameters }"
"{r | | show rejected candidates too }"
"{refine | | Corner refinement: CORNER_REFINE_NONE=0, CORNER_REFINE_SUBPIX=1,"
"CORNER_REFINE_CONTOUR=2, CORNER_REFINE_APRILTAG=3}";
}
//! [aruco_detect_markers_keys]
int main(int argc, char *argv[]) {
CommandLineParser parser(argc, argv, keys);
parser.about(about);
if(argc < 2) {
parser.printMessage();
return 0;
}
bool showRejected = parser.has("r");
bool estimatePose = parser.has("c");
float markerLength = parser.get<float>("l");
cv::aruco::DetectorParameters detectorParams;
if(parser.has("dp")) {
cv::FileStorage fs(parser.get<string>("dp"), FileStorage::READ);
bool readOk = detectorParams.readDetectorParameters(fs.root());
if(!readOk) {
cerr << "Invalid detector parameters file" << endl;
return 0;
}
}
if (parser.has("refine")) {
// override cornerRefinementMethod read from config file
detectorParams.cornerRefinementMethod = parser.get<aruco::CornerRefineMethod>("refine");
}
std::cout << "Corner refinement method (0: None, 1: Subpixel, 2:contour, 3: AprilTag 2): " << (int)detectorParams.cornerRefinementMethod << std::endl;
int camId = parser.get<int>("ci");
String video;
if(parser.has("v")) {
video = parser.get<String>("v");
}
if(!parser.check()) {
parser.printErrors();
return 0;
}
aruco::Dictionary dictionary = aruco::getPredefinedDictionary(cv::aruco::DICT_4X4_50);
if (parser.has("d")) {
int dictionaryId = parser.get<int>("d");
dictionary = aruco::getPredefinedDictionary(aruco::PredefinedDictionaryType(dictionaryId));
}
else if (parser.has("cd")) {
cv::FileStorage fs(parser.get<std::string>("cd"), FileStorage::READ);
bool readOk = dictionary.readDictionary(fs.root());
if(!readOk) {
std::cerr << "Invalid dictionary file" << std::endl;
return 0;
}
}
else {
std::cerr << "Dictionary not specified" << std::endl;
return 0;
}
//! [aruco_pose_estimation1]
cv::Mat camMatrix, distCoeffs;
if(estimatePose) {
// You can read camera parameters from tutorial_camera_params.yml
bool readOk = readCameraParameters(parser.get<string>("c"), camMatrix, distCoeffs);
if(!readOk) {
cerr << "Invalid camera file" << endl;
return 0;
}
}
//! [aruco_pose_estimation1]
//! [aruco_detect_markers]
cv::aruco::ArucoDetector detector(dictionary, detectorParams);
cv::VideoCapture inputVideo;
int waitTime;
if(!video.empty()) {
inputVideo.open(video);
waitTime = 0;
} else {
inputVideo.open(camId);
waitTime = 10;
}
double totalTime = 0;
int totalIterations = 0;
//! [aruco_pose_estimation2]
// set coordinate system
cv::Mat objPoints(4, 1, CV_32FC3);
objPoints.ptr<Vec3f>(0)[0] = Vec3f(-markerLength/2.f, markerLength/2.f, 0);
objPoints.ptr<Vec3f>(0)[1] = Vec3f(markerLength/2.f, markerLength/2.f, 0);
objPoints.ptr<Vec3f>(0)[2] = Vec3f(markerLength/2.f, -markerLength/2.f, 0);
objPoints.ptr<Vec3f>(0)[3] = Vec3f(-markerLength/2.f, -markerLength/2.f, 0);
//! [aruco_pose_estimation2]
while(inputVideo.grab()) {
cv::Mat image, imageCopy;
inputVideo.retrieve(image);
double tick = (double)getTickCount();
//! [aruco_pose_estimation3]
vector<int> ids;
vector<vector<Point2f> > corners, rejected;
// detect markers and estimate pose
detector.detectMarkers(image, corners, ids, rejected);
size_t nMarkers = corners.size();
vector<Vec3d> rvecs(nMarkers), tvecs(nMarkers);
if(estimatePose && !ids.empty()) {
// Calculate pose for each marker
for (size_t i = 0; i < nMarkers; i++) {
solvePnP(objPoints, corners.at(i), camMatrix, distCoeffs, rvecs.at(i), tvecs.at(i));
}
}
//! [aruco_pose_estimation3]
double currentTime = ((double)getTickCount() - tick) / getTickFrequency();
totalTime += currentTime;
totalIterations++;
if(totalIterations % 30 == 0) {
cout << "Detection Time = " << currentTime * 1000 << " ms "
<< "(Mean = " << 1000 * totalTime / double(totalIterations) << " ms)" << endl;
}
//! [aruco_draw_pose_estimation]
// draw results
image.copyTo(imageCopy);
if(!ids.empty()) {
cv::aruco::drawDetectedMarkers(imageCopy, corners, ids);
if(estimatePose) {
for(unsigned int i = 0; i < ids.size(); i++)
cv::drawFrameAxes(imageCopy, camMatrix, distCoeffs, rvecs[i], tvecs[i], markerLength * 1.5f, 2);
}
}
//! [aruco_draw_pose_estimation]
if(showRejected && !rejected.empty())
cv::aruco::drawDetectedMarkers(imageCopy, rejected, noArray(), Scalar(100, 0, 255));
imshow("out", imageCopy);
char key = (char)waitKey(waitTime);
if(key == 27) break;
}
//! [aruco_detect_markers]
return 0;
}
@@ -0,0 +1,14 @@
%YAML:1.0
camera_matrix: !!opencv-matrix
rows: 3
cols: 3
dt: d
data: [ 628.158, 0., 324.099,
0., 628.156, 260.908,
0., 0., 1. ]
distortion_coefficients: !!opencv-matrix
rows: 5
cols: 1
dt: d
data: [ 0.0995485, -0.206384,
0.00754589, 0.00336531, 0 ]
@@ -0,0 +1,38 @@
%YAML:1.0
nmarkers: 35
markersize: 6
marker_0: "101011111011111001001001101100000000"
marker_1: "000000000010011001010011111010111000"
marker_2: "011001100000001010000101111101001101"
marker_3: "001000111111000111011001110000011111"
marker_4: "100110110100101111000000111101110011"
marker_5: "010101101110111000111010111100010111"
marker_6: "101001000110011110101001010100110100"
marker_7: "011010100100110000011101110110100010"
marker_8: "111110001000101000110001010010111101"
marker_9: "011101101100110111001100100001010100"
marker_10: "100001100001010001110001011000000111"
marker_11: "110010010010011100101111111000001111"
marker_12: "110101001001010110011111010110001101"
marker_13: "001111000001000100010001101001010001"
marker_14: "000000010010101010111110110011010011"
marker_15: "110001110111100101110011111100111010"
marker_16: "101011001110001010110011111011001110"
marker_17: "101110111101110100101101011001010111"
marker_18: "000100111000111101010011010101000101"
marker_19: "001110001110001101100101110100000011"
marker_20: "100101101100010110110110110001100011"
marker_21: "010110001001011010000100111000110110"
marker_22: "001000000000100100000000010100010010"
marker_23: "101001110010100110000111111010010000"
marker_24: "111001101010001100011010010001011100"
marker_25: "101000010001010000110100111101101001"
marker_26: "101010000001010011001010110110000001"
marker_27: "100101001000010101001000111101111110"
marker_28: "010010100110010011110001110101011100"
marker_29: "011001000101100001101111010001001111"
marker_30: "000111011100011110001101111011011001"
marker_31: "010100001011000100111101110001101010"
marker_32: "100101101001101010111111101101110100"
marker_33: "101101001010111000000100110111010101"
marker_34: "011111010000111011111110110101100101"