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Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/enc_photon_noise_test.cc | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/enc_photon_noise_test.cc b/third_party/jpeg-xl/lib/jxl/enc_photon_noise_test.cc new file mode 100644 index 0000000000..be11b465ad --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/enc_photon_noise_test.cc @@ -0,0 +1,51 @@ +// Copyright (c) the JPEG XL 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. + +#include "lib/jxl/enc_photon_noise.h" + +#include "lib/jxl/test_utils.h" +#include "lib/jxl/testing.h" + +namespace jxl { +namespace { + +using ::testing::FloatNear; +using ::testing::Pointwise; + +MATCHER(AreApproximatelyEqual, "") { + constexpr float kTolerance = 1e-6; + const float actual = std::get<0>(arg); + const float expected = std::get<1>(arg); + return testing::ExplainMatchResult(FloatNear(expected, kTolerance), actual, + result_listener); +} + +TEST(EncPhotonNoiseTest, LUTs) { + EXPECT_THAT( + SimulatePhotonNoise(/*xsize=*/6000, /*ysize=*/4000, /*iso=*/100).lut, + Pointwise(AreApproximatelyEqual(), + {0.00259652, 0.0139648, 0.00681551, 0.00632582, 0.00694917, + 0.00803922, 0.00934574, 0.0107607})); + EXPECT_THAT( + SimulatePhotonNoise(/*xsize=*/6000, /*ysize=*/4000, /*iso=*/800).lut, + Pointwise(AreApproximatelyEqual(), + {0.02077220, 0.0420923, 0.01820690, 0.01439020, 0.01293670, + 0.01254030, 0.01277390, 0.0134161})); + EXPECT_THAT( + SimulatePhotonNoise(/*xsize=*/6000, /*ysize=*/4000, /*iso=*/6400).lut, + Pointwise(AreApproximatelyEqual(), + {0.1661770, 0.1691120, 0.05309080, 0.03963960, 0.03357410, + 0.03001650, 0.02776740, 0.0263478})); + + // Lower when measured on a per-pixel basis as there are fewer of them. + EXPECT_THAT( + SimulatePhotonNoise(/*xsize=*/4000, /*ysize=*/3000, /*iso=*/6400).lut, + Pointwise(AreApproximatelyEqual(), + {0.0830886, 0.1008720, 0.0367748, 0.0280305, 0.0240236, + 0.0218040, 0.0205771, 0.0200058})); +} + +} // namespace +} // namespace jxl |