About calibrate

[MikeDai2020]

Thanks for your works. I test calibate using the example data, I got: Camera Calibration:

• cam_error: 0.3244
• Kc: [2204.1396, 0, 843.5; 0, 2204.1396, 675.5; 0, 0, 1]
• kc: [-0.05676, 0, 0, 0, 0] Projector Calibration:
• proj_error: 2.576
• Kp: [9329.2891, 0, 874.30811; 0, 9329.2891, 1442.9962; 0, 0, 1]
• kp: [3.604, 0, 0, 0, 0] Stereo Calibration:
• stereo_error: 20.48
• Rp: [0.88852656, -0.11886059, 0.44316214; 0.13676967, 0.99056607, -0.0085391086; -0.43796644, 0.068198368, 0.89640081]
• Tp: [-429.7, -208.6, 1961] maybe something wrong with the Projector Calibration and Stereo Calibration. my setting is following: chechersize = 15 checkerrows = 9; checkcols = 13;

my edit code:

`std::vector readImages(std::string path) { std::vector images; std::vector names; cv::glob(path, names); for(auto name: names) { std::cout << name << std::endl; cv::Mat mat = cv::imread(name, cv::IMREAD_UNCHANGED); images.push_back(mat); } return images; }

void SLCalibrationDialog::on_calibrateButton_clicked() {

// Disable interface elements ui->calibrateButton->setEnabled(false); ui->listWidget->setEnabled(false);

// Stop live view killTimer(liveViewTimer); reviewMode = true; ui->snapButton->setText("Live View");

calibrator->reset();

// Note which frame sequences are used activeFrameSeqs.clear();

QListWidget widget = ui->listWidget; for (int i = 0; i < widget->count(); i++) { QListWidgetItem item = widget->item(i); if (item->checkState() == Qt::Checked) { // vector frameSeq(frameSeqs[i].begin(), // frameSeqs[i].begin() + // calibrator->getNPatterns()); std::string path = rootPath + "/" + item->text().toStdString(); std::cout << "add path:\n" << path << std::endl; std::vector frameSeq = readImages(path); calibrator->addFrameSequence(frameSeq); frameSeqs.push_back(frameSeq); activeFrameSeqs.push_back(i); } } calibrator->checkerSize = ui->checkerSizeBox->value(); calibrator->checkerCols = ui->checkerColsBox->value(); calibrator->checkerRows = ui->checkerRowsBox->value();

// Perform calibration calib = calibrator->calibrate();

// Re-enable interface elements ui->calibrateButton->setEnabled(true); ui->listWidget->setEnabled(true); ui->saveButton->setEnabled(true); }

void SLCalibrationDialog::on_listWidget_itemSelectionChanged() { std::cout << "on_listWidget_itemSelectionChanged" << std::endl; // If selection was cleared if (ui->listWidget->selectedItems().isEmpty()) { std::cout << "empty" << std::endl; return; }

// Stop live view killTimer(liveViewTimer); reviewMode = true; ui->snapButton->setText("Live View");

int currentRow = ui->listWidget->currentRow(); //ui->videoWidget->showFrameCV(frameSeqs[currentRow].back()); std::string path; path = rootPath + "/" + ui->listWidget->currentItem()->text().toStdString(); std::cout << "current path: " << path << std::endl; std::vector names; cv::glob(path, names); if(names.size() > 0) { cv::Mat mat = cv::imread(names[0]); if(!mat.empty()) ui->videoWidget->showFrameCV(mat); } }`

thank you in advance.

[jakobwilm]

Hi Mike.Haveyou verified your projector-camera linearity? This has come up a few times before. Linearity must be good before any hopes can be made. Sincerely

[MikeDai2020]

thanks for your reply. I just test calibrate with the images provided by you.