diff --git a/apps/interactive-calibration/frameProcessor.cpp b/apps/interactive-calibration/frameProcessor.cpp
index aaeabe6fbb..6da0f1fabe 100644
--- a/apps/interactive-calibration/frameProcessor.cpp
+++ b/apps/interactive-calibration/frameProcessor.cpp
@@ -308,7 +308,10 @@ cv::Mat CalibProcessor::processFrame(const cv::Mat &frame)
 {
     cv::Mat frameCopy;
     cv::Mat frameCopyToSave;
-    frame.copyTo(frameCopy);
+    if (frame.channels() == 1)
+        cv::cvtColor(frame, frameCopy, cv::COLOR_GRAY2BGR);
+    else
+        frame.copyTo(frameCopy);
     bool isTemplateFound = false;
     mCurrentImagePoints.clear();