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32bit rgb bmp file should not copy data as rgba

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This commit is contained in:
Harvey 2021-10-21 16:47:27 +08:00
parent 3c8cadf7ca
commit ce68291d83
2 changed files with 11 additions and 1 deletions
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2
modules/imgcodecs/src/grfmt_bmp.cpp
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@ -180,7 +180,7 @@ bool BmpDecoder::readHeader()
throw;
}
// in 32 bit case alpha channel is used - so require CV_8UC4 type
m_type = iscolor ? (m_bpp == 32 ? CV_8UC4 : CV_8UC3 ) : CV_8UC1;
m_type = iscolor ? ((m_bpp == 32 && m_rle_code != BMP_RGB) ? CV_8UC4 : CV_8UC3 ) : CV_8UC1;
m_origin = m_height > 0 ? IPL_ORIGIN_BL : IPL_ORIGIN_TL;
m_height = std::abs(m_height);

10
modules/imgcodecs/test/test_grfmt.cpp
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@ -280,6 +280,16 @@ TEST(Imgcodecs_Bmp, read_rle8)
EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), rle, ord);
}
TEST(Imgcodecs_Bmp, read_32bit_rgb)
{
const string root = cvtest::TS::ptr()->get_data_path();
const string filenameInput = root + "readwrite/test_32bit_rgb.bmp";
const Mat img = cv::imread(filenameInput, IMREAD_UNCHANGED);
ASSERT_FALSE(img.empty());
ASSERT_EQ(CV_8UC3, img.type());
}
#ifdef HAVE_IMGCODEC_HDR
TEST(Imgcodecs_Hdr, regression)
{