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/*******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
********************************************************/
#include <gtest/gtest.h>
#include <arrayfire.h>
#include <af/dim4.hpp>
#include <af/traits.hpp>
#include <vector>
#include <iostream>
#include <string>
#include <testHelpers.hpp>
using std::vector;
using std::string;
using std::abs;
using std::cout;
using std::endl;
template<typename T>
class Transform : public ::testing::Test
{
public:
virtual void SetUp() {}
};
template<typename T>
class TransformInt : public ::testing::Test
{
public:
virtual void SetUp() {
}
};
typedef ::testing::Types<float, double> TestTypes;
typedef ::testing::Types<int, intl, uint, uintl, short, ushort, uchar> TestTypesInt;
TYPED_TEST_CASE(Transform, TestTypes);
TYPED_TEST_CASE(TransformInt, TestTypesInt);
template<typename T>
void transformTest(string pTestFile, string pHomographyFile, const af_interp_type method, const bool invert)
{
if (noDoubleTests<T>()) return;
vector<af::dim4> inNumDims;
vector<string> inFiles;
vector<dim_t> goldNumDims;
vector<string> goldFiles;
readImageTests(pTestFile, inNumDims, inFiles, goldNumDims, goldFiles);
inFiles[0].insert(0,string(TEST_DIR"/transform/"));
inFiles[1].insert(0,string(TEST_DIR"/transform/"));
goldFiles[0].insert(0,string(TEST_DIR"/transform/"));
af::dim4 objDims = inNumDims[0];
vector<af::dim4> HNumDims;
vector<vector<float> > HIn;
vector<vector<float> > HTests;
readTests<float, float, float>(pHomographyFile, HNumDims, HIn, HTests);
af::dim4 HDims = HNumDims[0];
af_array sceneArray_f32 = 0;
af_array goldArray_f32 = 0;
af_array outArray_f32 = 0;
af_array sceneArray = 0;
af_array goldArray = 0;
af_array outArray = 0;
af_array HArray = 0;
ASSERT_EQ(AF_SUCCESS, af_load_image(&sceneArray_f32, inFiles[1].c_str(), false));
ASSERT_EQ(AF_SUCCESS, af_load_image(&goldArray_f32, goldFiles[0].c_str(), false));
ASSERT_EQ(AF_SUCCESS, conv_image<T>(&sceneArray, sceneArray_f32));
ASSERT_EQ(AF_SUCCESS, conv_image<T>(&goldArray, goldArray_f32));
ASSERT_EQ(AF_SUCCESS, af_create_array(&HArray, &(HIn[0].front()), HDims.ndims(), HDims.get(), f32));
ASSERT_EQ(AF_SUCCESS, af_transform(&outArray, sceneArray, HArray, objDims[0], objDims[1], method, invert));
// Get gold data
dim_t goldEl = 0;
ASSERT_EQ(AF_SUCCESS, af_get_elements(&goldEl, goldArray));
T* goldData = new T[goldEl];
ASSERT_EQ(AF_SUCCESS, af_get_data_ptr((void*)goldData, goldArray));
// Get result
dim_t outEl = 0;
ASSERT_EQ(AF_SUCCESS, af_get_elements(&outEl, outArray));
T* outData = new T[outEl];
ASSERT_EQ(AF_SUCCESS, af_get_data_ptr((void*)outData, outArray));
const float thr = 1.1f;
// Maximum number of wrong pixels must be <= 0.01% of number of elements,
// this metric is necessary due to rounding errors between different
// backends for AF_INTERP_NEAREST and AF_INTERP_LOWER
const size_t maxErr = goldEl * 0.0001f;
size_t err = 0;
for (dim_t elIter = 0; elIter < goldEl; elIter++) {
err += fabs((float)floor(outData[elIter]) - (float)floor(goldData[elIter])) > thr;
if (err > maxErr)
ASSERT_LE(err, maxErr) << "at: " << elIter << std::endl;
}
delete[] goldData;
delete[] outData;
if(sceneArray_f32 != 0) af_release_array(sceneArray_f32);
if(goldArray_f32 != 0) af_release_array(goldArray_f32);
if(outArray_f32 != 0) af_release_array(outArray_f32);
if(sceneArray != 0) af_release_array(sceneArray);
if(goldArray != 0) af_release_array(goldArray);
if(outArray != 0) af_release_array(outArray);
if(HArray != 0) af_release_array(HArray);
}
TYPED_TEST(Transform, PerspectiveNearest)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_nearest.test"),
string(TEST_DIR"/transform/tux_tmat.test"),
AF_INTERP_NEAREST, false);
}
TYPED_TEST(Transform, PerspectiveBilinear)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_bilinear.test"),
string(TEST_DIR"/transform/tux_tmat.test"),
AF_INTERP_BILINEAR, false);
}
TYPED_TEST(Transform, PerspectiveLower)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_lower.test"),
string(TEST_DIR"/transform/tux_tmat.test"),
AF_INTERP_LOWER, false);
}
TYPED_TEST(Transform, PerspectiveNearestInvert)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_nearest.test"),
string(TEST_DIR"/transform/tux_tmat_inverse.test"),
AF_INTERP_NEAREST, true);
}
TYPED_TEST(Transform, PerspectiveBilinearInvert)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_bilinear.test"),
string(TEST_DIR"/transform/tux_tmat_inverse.test"),
AF_INTERP_BILINEAR, true);
}
TYPED_TEST(Transform, PerspectiveLowerInvert)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_lower.test"),
string(TEST_DIR"/transform/tux_tmat_inverse.test"),
AF_INTERP_LOWER, true);
}
TYPED_TEST(TransformInt, PerspectiveNearest)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_nearest.test"),
string(TEST_DIR"/transform/tux_tmat.test"),
AF_INTERP_NEAREST, false);
}
TYPED_TEST(TransformInt, PerspectiveBilinear)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_bilinear.test"),
string(TEST_DIR"/transform/tux_tmat.test"),
AF_INTERP_BILINEAR, false);
}
TYPED_TEST(TransformInt, PerspectiveLower)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_lower.test"),
string(TEST_DIR"/transform/tux_tmat.test"),
AF_INTERP_LOWER, false);
}
TYPED_TEST(TransformInt, PerspectiveNearestInvert)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_nearest.test"),
string(TEST_DIR"/transform/tux_tmat_inverse.test"),
AF_INTERP_NEAREST, true);
}
TYPED_TEST(TransformInt, PerspectiveBilinearInvert)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_bilinear.test"),
string(TEST_DIR"/transform/tux_tmat_inverse.test"),
AF_INTERP_BILINEAR, true);
}
TYPED_TEST(TransformInt, PerspectiveLowerInvert)
{
transformTest<TypeParam>(string(TEST_DIR"/transform/tux_lower.test"),
string(TEST_DIR"/transform/tux_tmat_inverse.test"),
AF_INTERP_LOWER, true);
}
///////////////////////////////////// CPP ////////////////////////////////
//
TEST(Transform, CPP)
{
vector<af::dim4> inDims;
vector<string> inFiles;
vector<dim_t> goldDim;
vector<string> goldFiles;
vector<af::dim4> HDims;
vector<vector<float> > HIn;
vector<vector<float> > HTests;
readTests<float, float, float>(TEST_DIR"/transform/tux_tmat.test",HDims,HIn,HTests);
readImageTests(string(TEST_DIR"/transform/tux_nearest.test"), inDims, inFiles, goldDim, goldFiles);
inFiles[0].insert(0,string(TEST_DIR"/transform/"));
inFiles[1].insert(0,string(TEST_DIR"/transform/"));
goldFiles[0].insert(0,string(TEST_DIR"/transform/"));
af::array H = af::array(HDims[0][0], HDims[0][1], &(HIn[0].front()));
af::array IH = af::array(HDims[0][0], HDims[0][1], &(HIn[0].front()));
af::array scene_img = af::loadImage(inFiles[1].c_str(), false);
af::array gold_img = af::loadImage(goldFiles[0].c_str(), false);
af::array out_img = af::transform(scene_img, IH, inDims[0][0], inDims[0][1], AF_INTERP_NEAREST, false);
af::dim4 outDims = out_img.dims();
af::dim4 goldDims = gold_img.dims();
float* h_out_img = new float[outDims[0] * outDims[1]];
out_img.host(h_out_img);
float* h_gold_img = new float[goldDims[0] * goldDims[1]];
gold_img.host(h_gold_img);
const dim_t n = gold_img.elements();
const float thr = 1.0f;
// Maximum number of wrong pixels must be <= 0.01% of number of elements,
// this metric is necessary due to rounding errors between different
// backends for AF_INTERP_NEAREST and AF_INTERP_LOWER
const size_t maxErr = n * 0.0001f;
size_t err = 0;
for (dim_t elIter = 0; elIter < n; elIter++) {
err += fabs((int)h_out_img[elIter] - h_gold_img[elIter]) > thr;
if (err > maxErr)
ASSERT_LE(err, maxErr) << "at: " << elIter << std::endl;
}
delete[] h_gold_img;
delete[] h_out_img;
}
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