Function BuildTemplateTestData

tests/opencv_test.cpp:202–245

构造测试用的大图和模板文件。

// 构造测试用的大图和模板文件。
void BuildTemplateTestData(
    std::vector<uchar> &source_bgra,
    int &source_width,
    int &source_height,
    int &template_x,
    int &template_y,
    int &template_width,
    int &template_height,
    std::wstring &template_path) {
    source_width = 8;
    source_height = 8;
    source_bgra.assign(static_cast<size_t>(source_width * source_height * 4), 0);

    for (int y = 0; y < source_height; ++y) {
        for (int x = 0; x < source_width; ++x) {
            const size_t index = static_cast<size_t>((y * source_width + x) * 4);
            source_bgra[index + 0] = static_cast<uchar>((x * x * 17 + y * 29 + x * y * 7 + 23) % 251);
            source_bgra[index + 1] = static_cast<uchar>((x * 31 + y * y * 19 + x * y * 11 + 47) % 253);
            source_bgra[index + 2] = static_cast<uchar>((x * 13 + y * 17 + x * x * 5 + y * y * 3 + 71) % 255);
            source_bgra[index + 3] = 255;
        }
    }

    template_x = 3;
    template_y = 2;
    template_width = 3;
    template_height = 3;

    std::vector<uchar> template_bgra(static_cast<size_t>(template_width * template_height * 4), 0);
    for (int y = 0; y < template_height; ++y) {
        for (int x = 0; x < template_width; ++x) {
            const size_t source_index =
                static_cast<size_t>(((template_y + y) * source_width + (template_x + x)) * 4);
            const size_t template_index = static_cast<size_t>((y * template_width + x) * 4);
            for (int channel = 0; channel < 4; ++channel) {
                template_bgra[template_index + channel] = source_bgra[source_index + channel];
            }
        }
    }

    const auto template_bmp = test_support::BuildBmp32TopDown(template_width, template_height, template_bgra);
    template_path = test_support::GetTempBmpPath(L"opencv_template_match.bmp");
    ASSERT_TRUE(WriteBytesToFile(template_path, template_bmp));
}

// 构造更适合 ORB 的随机纹理块测试数据。
void BuildFeaturePatternData(