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Merge pull request #2323 from stuart8c:issue2601_2.4_fix_16bit_tiff_reading_on_big_endian_host

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This commit is contained in:
Roman Donchenko
2014-02-14 15:37:09 +04:00
committed by OpenCV Buildbot
parent a1de9e9ad5 1454843b81
commit fa272c43c2
5 changed files with 68 additions and 19 deletions
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15
modules/highgui/src/grfmt_tiff.cpp
View File

@@ -111,18 +111,21 @@ bool TiffDecoder::readHeader()
bool result = false;
close();
TIFF* tif = TIFFOpen( m_filename.c_str(), "rb" );
// TIFFOpen() mode flags are different to fopen(). A 'b' in mode "rb" has no effect when reading.
// http://www.remotesensing.org/libtiff/man/TIFFOpen.3tiff.html
TIFF* tif = TIFFOpen( m_filename.c_str(), "r" );
if( tif )
{
int wdth = 0, hght = 0, photometric = 0;
uint32 wdth = 0, hght = 0;
uint16 photometric = 0;
m_tif = tif;
if( TIFFGetField( tif, TIFFTAG_IMAGEWIDTH, &wdth ) &&
TIFFGetField( tif, TIFFTAG_IMAGELENGTH, &hght ) &&
TIFFGetField( tif, TIFFTAG_PHOTOMETRIC, &photometric ))
{
int bpp=8, ncn = photometric > 1 ? 3 : 1;
uint16 bpp=8, ncn = photometric > 1 ? 3 : 1;
TIFFGetField( tif, TIFFTAG_BITSPERSAMPLE, &bpp );
TIFFGetField( tif, TIFFTAG_SAMPLESPERPIXEL, &ncn );
@@ -175,12 +178,12 @@ bool TiffDecoder::readData( Mat& img )
if( m_tif && m_width && m_height )
{
TIFF* tif = (TIFF*)m_tif;
int tile_width0 = m_width, tile_height0 = 0;
uint32 tile_width0 = m_width, tile_height0 = 0;
int x, y, i;
int is_tiled = TIFFIsTiled(tif);
int photometric;
uint16 photometric;
TIFFGetField( tif, TIFFTAG_PHOTOMETRIC, &photometric );
int bpp = 8, ncn = photometric > 1 ? 3 : 1;
uint16 bpp = 8, ncn = photometric > 1 ? 3 : 1;
TIFFGetField( tif, TIFFTAG_BITSPERSAMPLE, &bpp );
TIFFGetField( tif, TIFFTAG_SAMPLESPERPIXEL, &ncn );
const int bitsPerByte = 8;

52
modules/highgui/test/test_grfmt.cpp
View File

@@ -408,8 +408,8 @@ TEST(Highgui_Tiff, decode_tile16384x16384)
try
{
cv::imread(file3);
EXPECT_NO_THROW(cv::imread(file4));
cv::imread(file3, CV_LOAD_IMAGE_UNCHANGED);
EXPECT_NO_THROW(cv::imread(file4, CV_LOAD_IMAGE_UNCHANGED));
}
catch(const std::bad_alloc&)
{
@@ -419,4 +419,52 @@ TEST(Highgui_Tiff, decode_tile16384x16384)
remove(file3.c_str());
remove(file4.c_str());
}
TEST(Highgui_Tiff, write_read_16bit_big_little_endian)
{
// see issue #2601 "16-bit Grayscale TIFF Load Failures Due to Buffer Underflow and Endianness"
// Setup data for two minimal 16-bit grayscale TIFF files in both endian formats
uchar tiff_sample_data[2][86] = { {
// Little endian
0x49, 0x49, 0x2a, 0x00, 0x0c, 0x00, 0x00, 0x00, 0xad, 0xde, 0xef, 0xbe, 0x06, 0x00, 0x00, 0x01,
0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x01, 0x03, 0x00, 0x01, 0x00,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x01, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x00,
0x00, 0x00, 0x06, 0x01, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x11, 0x01,
0x04, 0x00, 0x01, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x17, 0x01, 0x04, 0x00, 0x01, 0x00,
0x00, 0x00, 0x04, 0x00, 0x00, 0x00 }, {
// Big endian
0x4d, 0x4d, 0x00, 0x2a, 0x00, 0x00, 0x00, 0x0c, 0xde, 0xad, 0xbe, 0xef, 0x00, 0x06, 0x01, 0x00,
0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x00, 0x01, 0x01, 0x00, 0x03, 0x00, 0x00,
0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x01, 0x02, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x10,
0x00, 0x00, 0x01, 0x06, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x01, 0x11,
0x00, 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x08, 0x01, 0x17, 0x00, 0x04, 0x00, 0x00,
0x00, 0x01, 0x00, 0x00, 0x00, 0x04 }
};
// Test imread() for both a little endian TIFF and big endian TIFF
for (int i = 0; i < 2; i++)
{
string filename = cv::tempfile(".tiff");
// Write sample TIFF file
FILE* fp = fopen(filename.c_str(), "wb");
ASSERT_TRUE(fp != NULL);
ASSERT_EQ((size_t)1, fwrite(tiff_sample_data, 86, 1, fp));
fclose(fp);
Mat img = imread(filename, CV_LOAD_IMAGE_UNCHANGED);
EXPECT_EQ(1, img.rows);
EXPECT_EQ(2, img.cols);
EXPECT_EQ(CV_16U, img.type());
EXPECT_EQ(sizeof(ushort), img.elemSize());
EXPECT_EQ(1, img.channels());
EXPECT_EQ(0xDEAD, img.at<ushort>(0,0));
EXPECT_EQ(0xBEEF, img.at<ushort>(0,1));
remove(filename.c_str());
}
}
#endif