Imported Upstream version 0.9.0upstream/0.9.0upstream

Change-Id: I60862786d19d92bb65425923bfeaa8ec236d8722

1 files changed, 28 insertions, 0 deletions

diff --git a/lib/extras/metrics.h b/lib/extras/metrics.h
new file mode 100644
index 0000000..87a69a9
--- /dev/null
+++ b/lib/extras/metrics.h
@@ -0,0 +1,28 @@
+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef LIB_EXTRAS_METRICS_H_
+#define LIB_EXTRAS_METRICS_H_
+
+#include <stdint.h>
+
+#include "lib/jxl/butteraugli/butteraugli.h"
+#include "lib/jxl/image_bundle.h"
+
+namespace jxl {
+
+// Computes p-norm given the butteraugli distmap.
+double ComputeDistanceP(const ImageF& distmap, const ButteraugliParams& params,
+                        double p);
+
+double ComputeDistance2(const ImageBundle& ib1, const ImageBundle& ib2,
+                        const JxlCmsInterface& cms);
+
+double ComputePSNR(const ImageBundle& ib1, const ImageBundle& ib2,
+                   const JxlCmsInterface& cms);
+
+}  // namespace jxl
+
+#endif  // LIB_EXTRAS_METRICS_H_