diff --git a/app/src/main/cpp/PhoneDevice.cpp b/app/src/main/cpp/PhoneDevice.cpp
index 5420bf8e..40584a45 100644
--- a/app/src/main/cpp/PhoneDevice.cpp
+++ b/app/src/main/cpp/PhoneDevice.cpp
@@ -936,6 +936,8 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
 
 #ifdef _DEBUG
 
+    cv::Scalar scalar(0, 0, 255);  // white
+
     NdkCamera::CAPTURE_RESULT captureResult = mCamera->getCaptureResult();
     char str[128] = { 0 };
     snprintf(str, sizeof(str), "AE=%u EXPOSURE=%ums ISO=%d AF=%u FD=%.3f", captureResult.autoExposure,
@@ -943,7 +945,7 @@ bool CPhoneDevice::OnImageReady(cv::Mat& mat)
              captureResult.sensitibity,
              captureResult.autoFocus,
              isnan(captureResult.FocusDistance) ? 0 : captureResult.FocusDistance);
-    cv::putText(mat, str, cv::Point(0, mat.rows), cv::FONT_HERSHEY_COMPLEX, fontScale, scalar2, thickness1, cv::LINE_AA);
+    cv::putText(mat, str, cv::Point(0, mat.rows - 20), cv::FONT_HERSHEY_COMPLEX, fontScale, scalar, thickness1, cv::LINE_AA);
 
 #endif