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https://github.com/tesseract-ocr/tesseract.git
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100 lines
3.5 KiB
C++
100 lines
3.5 KiB
C++
// (C) Copyright 2017, Google Inc.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "blobs.h"
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#include "normalis.h"
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#include "include_gunit.h"
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namespace tesseract {
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class DENORMTest : public testing::Test {
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protected:
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void SetUp() {
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std::locale::global(std::locale(""));
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}
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public:
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void TearDown() {}
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void ExpectCorrectTransform(const DENORM& denorm, const TPOINT& src,
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const TPOINT& result, bool local) {
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TPOINT normed;
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if (local)
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denorm.LocalNormTransform(src, &normed);
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else
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denorm.NormTransform(nullptr, src, &normed);
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EXPECT_EQ(result.x, normed.x);
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EXPECT_EQ(result.y, normed.y);
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// Now undo
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TPOINT denormed;
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if (local)
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denorm.LocalDenormTransform(normed, &denormed);
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else
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denorm.DenormTransform(nullptr, normed, &denormed);
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EXPECT_EQ(src.x, denormed.x);
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EXPECT_EQ(src.y, denormed.y);
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}
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};
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// Tests a simple baseline-style normalization.
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TEST_F(DENORMTest, NoRotations) {
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DENORM denorm;
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denorm.SetupNormalization(nullptr, nullptr, nullptr, 1000.0f, 2000.0f, 2.0f, 3.0f,
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0.0f, static_cast<float>(kBlnBaselineOffset));
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TPOINT pt1(1100, 2000);
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TPOINT result1(200, kBlnBaselineOffset);
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ExpectCorrectTransform(denorm, pt1, result1, true);
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ExpectCorrectTransform(denorm, pt1, result1, false);
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TPOINT pt2(900, 2100);
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TPOINT result2(-200, 300 + kBlnBaselineOffset);
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ExpectCorrectTransform(denorm, pt2, result2, true);
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ExpectCorrectTransform(denorm, pt2, result2, false);
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}
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// Tests a simple baseline-style normalization with a rotation.
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TEST_F(DENORMTest, WithRotations) {
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DENORM denorm;
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FCOORD rotation90(0.0f, 1.0f);
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denorm.SetupNormalization(nullptr, &rotation90, nullptr, 1000.0f, 2000.0f, 2.0f,
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3.0f, 0.0f, static_cast<float>(kBlnBaselineOffset));
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TPOINT pt1(1100, 2000);
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TPOINT result1(0, 200 + kBlnBaselineOffset);
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ExpectCorrectTransform(denorm, pt1, result1, true);
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ExpectCorrectTransform(denorm, pt1, result1, false);
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TPOINT pt2(900, 2100);
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TPOINT result2(-300, kBlnBaselineOffset - 200);
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ExpectCorrectTransform(denorm, pt2, result2, true);
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ExpectCorrectTransform(denorm, pt2, result2, false);
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}
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// Tests a simple baseline-style normalization with a second rotation & scale.
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TEST_F(DENORMTest, Multiple) {
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DENORM denorm;
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denorm.SetupNormalization(nullptr, nullptr, nullptr, 1000.0f, 2000.0f, 2.0f, 3.0f,
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0.0f, static_cast<float>(kBlnBaselineOffset));
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DENORM denorm2;
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FCOORD rotation90(0.0f, 1.0f);
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denorm2.SetupNormalization(nullptr, &rotation90, &denorm, 128.0f, 128.0f, 0.5f,
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0.25f, 0.0f, 0.0f);
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TPOINT pt1(1050, 2000);
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TPOINT result1(100, kBlnBaselineOffset);
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ExpectCorrectTransform(denorm, pt1, result1, true);
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ExpectCorrectTransform(denorm, pt1, result1, false);
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TPOINT result2(kBlnBaselineOffset / 4, -14);
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ExpectCorrectTransform(denorm2, result1, result2, true);
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ExpectCorrectTransform(denorm2, pt1, result2, false);
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}
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} // namespace.
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