From 4268fbe011fb5303eaf1baaf6750ee8577577580 Mon Sep 17 00:00:00 2001
From: John Richardson <john.richardson@arm.com>
Date: Tue, 29 Aug 2017 11:22:35 +0100
Subject: COMPMID-501: Move IntegralImage to new validation

Change-Id: I57ba1bc57831a2f0b5db729fab768fcd580c1cfe
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/86717
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Moritz Pflanzer <moritz.pflanzer@arm.com>
---
 tests/validation/CPP/IntegralImage.cpp | 86 ++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 tests/validation/CPP/IntegralImage.cpp

(limited to 'tests/validation/CPP/IntegralImage.cpp')

diff --git a/tests/validation/CPP/IntegralImage.cpp b/tests/validation/CPP/IntegralImage.cpp
new file mode 100644
index 0000000000..8d07e995b5
--- /dev/null
+++ b/tests/validation/CPP/IntegralImage.cpp
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "IntegralImage.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace reference
+{
+template <typename T>
+SimpleTensor<uint32_t> integral_image(const SimpleTensor<T> &src)
+{
+    SimpleTensor<uint32_t> dst(src.shape(), DataType::U32);
+
+    // Length of dimensions
+    const size_t width  = src.shape().x();
+    const size_t height = src.shape().y();
+    const size_t depth  = src.shape().total_size_upper(2);
+
+    const size_t image_size = width * height;
+
+    for(size_t z = 0; z < depth; ++z)
+    {
+        size_t current_image = z * image_size;
+
+        //First element of each image
+        dst[current_image] = src[current_image];
+
+        // First row of each image (add only pixel on the left)
+        for(size_t x = 1; x < width; ++x)
+        {
+            dst[current_image + x] = static_cast<uint32_t>(src[current_image + x]) + dst[current_image + x - 1];
+        }
+
+        // Subsequent rows
+        for(size_t y = 1; y < height; ++y)
+        {
+            size_t current_row = current_image + (width * y);
+
+            // First element of each row (add only pixel up)
+            dst[current_row] = static_cast<uint32_t>(src[current_row]) + dst[current_row - width];
+
+            // Following row elements
+            for(size_t x = 1; x < width; ++x)
+            {
+                size_t current_pixel = current_row + x;
+
+                // out = in + up(out) + left(out) - up_left(out)
+                dst[current_pixel] = static_cast<uint32_t>(src[current_pixel]) + dst[current_pixel - 1]
+                                     + dst[current_pixel - width] - dst[current_pixel - width - 1];
+            }
+        }
+    }
+
+    return dst;
+}
+
+template SimpleTensor<uint32_t> integral_image(const SimpleTensor<uint8_t> &src);
+} // namespace reference
+} // namespace validation
+} // namespace test
+} // namespace arm_compute
-- 
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