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Unified Diff: webrtc/modules/video_processing/util/noise_estimation.h

Issue 1822333003: External denoiser based on noise estimation and moving object detection. (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master
Patch Set: Created 4 years, 9 months ago
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Index: webrtc/modules/video_processing/util/noise_estimation.h
diff --git a/webrtc/modules/video_processing/util/noise_estimation.h b/webrtc/modules/video_processing/util/noise_estimation.h
new file mode 100644
index 0000000000000000000000000000000000000000..ca5cc2324fbf4b17294f2b53fb6381256aca80b4
--- /dev/null
+++ b/webrtc/modules/video_processing/util/noise_estimation.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2016 The WebRTC 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 in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_VIDEO_PROCESSING_UTIL_NOISE_ESTIMATION_H_
+#define WEBRTC_MODULES_VIDEO_PROCESSING_UTIL_NOISE_ESTIMATION_H_
+
+#include "webrtc/base/scoped_ptr.h"
+#include "webrtc/modules/include/module_common_types.h"
+#include "webrtc/modules/video_processing/include/video_processing_defines.h"
+#include "webrtc/modules/video_processing/util/denoiser_filter.h"
+
+namespace webrtc {
+
+#define EXPERIMENTAL 0
+#define DISPLAY 0
+
+const int kNoiseThreshold = 200;
+const int kNoiseThresholdNeon = 70;
+const int kConsecLowVarFrame = 6;
+const int kAverageLumaMin = 20;
+const int kAverageLumaMax = 220;
+const int kBlockSelectionVarMax = kNoiseThreshold << 1;
+
+class NoiseEstimation {
+ public:
+ void Init(int width, int height, CpuType cpu_type);
+ void GetNoise(int mb_index, uint32_t var, uint32_t luma);
+ void ResetConsecLowVar(int mb_index);
+ void UpdateNoiseLevel();
+ // 0: low noise, 1: high noise
+ uint8_t GetNoiseLevel();
+
+ private:
+ int width_;
+ int height_;
+ int mb_rows_;
+ int mb_cols_;
+ CpuType cpu_type_;
+ uint32_t noise_var_;
+ double noise_var_accum_;
+ int num_noisy_block_;
+ int num_static_block_;
+ double percent_static_block_;
+ rtc::scoped_ptr<uint32_t[]> consec_low_var_;
+};
+
+} // namespace webrtc
+
+#endif // WEBRTC_MODULES_VIDEO_PROCESSING_UTIL_NOISE_ESTIMATION_H_
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