Merge pull request #22147 from rogday:zoom_factor

Add zoom factor to interactive calibration tool

* add zoom factor

* address review comments

apps/interactive-calibration/frameProcessor.cpp

@@ -201,7 +201,16 @@ void CalibProcessor::showCaptureMessage(const cv::Mat& frame, const std::string
     double textSize = VIDEO_TEXT_SIZE * frame.cols / (double) IMAGE_MAX_WIDTH;
     cv::bitwise_not(frame, frame);
     cv::putText(frame, message, textOrigin, 1, textSize, cv::Scalar(0,0,255), 2, cv::LINE_AA);
-    cv::imshow(mainWindowName, frame);
+    cv::Mat resized;
+    if (std::fabs(mZoom - 1.) > 0.001f)
+    {
+        cv::resize(frame, resized, cv::Size(), mZoom, mZoom);
+    }
+    else
+    {
+        resized = frame;
+    }
+    cv::imshow(mainWindowName, resized);
     cv::waitKey(300);
 }
 
@@ -267,6 +276,7 @@ CalibProcessor::CalibProcessor(cv::Ptr<calibrationData> data, captureParameters
     mSquareSize = capParams.squareSize;
     mTemplDist = capParams.templDst;
     mSaveFrames = capParams.saveFrames;
+    mZoom = capParams.zoom;
 
     switch(mBoardType)
     {