message: stitching(perf): increase test check tolerance
diff: @@ -102,7 +102,7 @@ PERF_TEST_P(stitchDatasets, affine, testing::Combine(AFFINE_DATASETS, TEST_DETEC
  Mat pano;
  vector<Mat> imgs;
  - int width, height, allowed_diff = 10;
  + int width, height, allowed_diff = 20;
  Ptr<detail::FeaturesFinder> featuresFinder = getFeatureFinder(detector);
  if(dataset == "budapest")
  @@ -117,7 +117,7 @@ PERF_TEST_P(stitchDatasets, affine, testing::Combine(AFFINE_DATASETS, TEST_DETEC
  height = 1158;
  // this dataset is big, the results between surf and orb differ slightly,
  // but both are still good
  - allowed_diff = 27;
  + allowed_diff = 50;
  }
  else if (dataset == "newspaper")
  {
  