message: If the user passes an empty output matrix, initialize it to identity.
diff: @@ -325,6 +325,16 @@ double cv::findTransformECC(InputArray templateImage,
  CV_Assert(!src.empty());
  CV_Assert(!dst.empty());
  + // If the user passed an un-initialized warpMatrix, initialize to identity
  + if(map.empty()) {
  + int rowCount = 2;
  + if(motionType == MOTION_HOMOGRAPHY)
  + rowCount = 3;
  +
  + warpMatrix.create(rowCount, 3, CV_32FC1);
  + map = warpMatrix.getMat();
  + map = Mat::eye(rowCount, 3, CV_32F);
  + }
  if( ! (src.type()==dst.type()))
  CV_Error( Error::StsUnmatchedFormats, "Both input images must have the same data type" );
  