normal_map_test.cc

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// Copyright (c) 2018, ETH Zurich and UNC Chapel Hill.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are met:
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//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
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//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
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//     * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of
//       its contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de)
 
#define TEST_NAME "mvs/normal_map_test"
#include "util/testing.h"
 
#include "mvs/normal_map.h"
 
using namespace colmap;
using namespace colmap::mvs;
 
BOOST_AUTO_TEST_CASE(TestEmpty) {
  NormalMap normal_map;
  BOOST_CHECK_EQUAL(normal_map.GetWidth(), 0);
  BOOST_CHECK_EQUAL(normal_map.GetHeight(), 0);
  BOOST_CHECK_EQUAL(normal_map.GetDepth(), 3);
}
 
BOOST_AUTO_TEST_CASE(TestNonEmpty) {
  NormalMap normal_map(1, 2);
  BOOST_CHECK_EQUAL(normal_map.GetWidth(), 1);
  BOOST_CHECK_EQUAL(normal_map.GetHeight(), 2);
  BOOST_CHECK_EQUAL(normal_map.GetDepth(), 3);
}
 
BOOST_AUTO_TEST_CASE(TestRescale) {
  NormalMap normal_map(6, 7);
  normal_map.Rescale(0.5);
  BOOST_CHECK_EQUAL(normal_map.GetWidth(), 3);
  BOOST_CHECK_EQUAL(normal_map.GetHeight(), 4);
  BOOST_CHECK_EQUAL(normal_map.GetDepth(), 3);
}
 
BOOST_AUTO_TEST_CASE(TestDownsize) {
  NormalMap normal_map(6, 7);
  normal_map.Downsize(2, 4);
  BOOST_CHECK_EQUAL(normal_map.GetWidth(), 2);
  BOOST_CHECK_EQUAL(normal_map.GetHeight(), 2);
  BOOST_CHECK_EQUAL(normal_map.GetDepth(), 3);
}
 
BOOST_AUTO_TEST_CASE(TestToBitmap) {
  NormalMap normal_map(2, 2);
  normal_map.Set(0, 0, 0, 0);
  normal_map.Set(0, 0, 1, 0);
  normal_map.Set(0, 0, 2, 1);
  normal_map.Set(0, 1, 0, 0);
  normal_map.Set(0, 1, 1, 1);
  normal_map.Set(0, 1, 2, 0);
  normal_map.Set(1, 0, 0, 1);
  normal_map.Set(1, 0, 1, 0);
  normal_map.Set(1, 0, 2, 0);
  normal_map.Set(1, 1, 0, 1 / std::sqrt(2.0f));
  normal_map.Set(1, 1, 1, 1 / std::sqrt(2.0f));
  normal_map.Set(1, 1, 2, 0);
  const Bitmap bitmap = normal_map.ToBitmap();
  BOOST_CHECK_EQUAL(bitmap.Width(), normal_map.GetWidth());
  BOOST_CHECK_EQUAL(bitmap.Height(), normal_map.GetHeight());
  BOOST_CHECK_EQUAL(bitmap.IsRGB(), true);
  BitmapColor<uint8_t> color;
  BOOST_CHECK(bitmap.GetPixel(0, 0, &color));
  BOOST_CHECK_EQUAL(color, BitmapColor<uint8_t>(128, 128, 0));
  BOOST_CHECK(bitmap.GetPixel(0, 1, &color));
  BOOST_CHECK_EQUAL(color, BitmapColor<uint8_t>(0, 128, 0));
  BOOST_CHECK(bitmap.GetPixel(1, 0, &color));
  BOOST_CHECK_EQUAL(color, BitmapColor<uint8_t>(128, 0, 0));
  BOOST_CHECK(bitmap.GetPixel(1, 1, &color));
  BOOST_CHECK_EQUAL(color, BitmapColor<uint8_t>(37, 37, 0));
}