From f795986c8d4594279c277b14a33d29e48b2a4def Mon Sep 17 00:00:00 2001
From: Giorgio Arena <giorgio.arena@arm.com>
Date: Tue, 13 Jun 2017 15:19:51 +0100
Subject: COMPMID-378 NEMeanStdDev test completed.

Change-Id: I46fb77c0cb507a4c0fe3264a89dd7b2ba63c44dc
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/77427
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Steven Niu <steven.niu@arm.com>
---
 tests/validation/TensorOperations.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'tests/validation/TensorOperations.h')

diff --git a/tests/validation/TensorOperations.h b/tests/validation/TensorOperations.h
index 5e27e9d3a0..119be02423 100644
--- a/tests/validation/TensorOperations.h
+++ b/tests/validation/TensorOperations.h
@@ -221,6 +221,29 @@ void apply_2d_spatial_filter(Coordinates coord, const Tensor<T1> &in, Tensor<T3>
 }
 } // namespace
 
+// Mean Standard Deviation
+template <typename T1>
+void mean_and_standard_deviation(const Tensor<T1> &in, float &mean, float &std_dev)
+{
+    int num_elements = in.num_elements();
+
+    // Calculate mean
+    mean = 0.f;
+    for(int i = 0; i < num_elements; ++i)
+    {
+        mean += in[i];
+    }
+    mean /= num_elements;
+
+    // Calculate standard deviation
+    std_dev = 0.f;
+    for(int i = 0; i < num_elements; ++i)
+    {
+        std_dev += (mean - in[i]) * (mean - in[i]);
+    }
+    std_dev = sqrt(std_dev / num_elements);
+}
+
 // Integral Image
 void integral_image(const Tensor<uint8_t> &in, Tensor<uint32_t> &out)
 {
-- 
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