Function opencv::hdf::open

pub fn open(hdf5_filename: &str) -> Result<PtrOfHDF5>

Open or create hdf5 file

Parameters

• HDF5Filename: specify the HDF5 filename.

Returns a pointer to the hdf5 object class

Note: If the specified file does not exist, it will be created using default properties. Otherwise, it is opened in read and write mode with default access properties. Any operations except dscreate() functions on object will be thread safe. Multiple datasets can be created inside a single hdf5 file, and can be accessed from the same hdf5 object from multiple instances as long read or write operations are done over non-overlapping regions of dataset. Single hdf5 file also can be opened by multiple instances, reads and writes can be instantiated at the same time as long as non-overlapping regions are involved. Object is released using close().

• Example below opens and then releases the file.

// open / auto create hdf5 file
cv::Ptr<cv::hdf::HDF5> h5io = cv::hdf::open( "mytest.h5" );
// ...
// release
h5io->close();

• Text dump (3x3 Hilbert matrix) of hdf5 dataset using h5dump tool:

$ h5dump test.h5
HDF5 "test.h5" {
GROUP "/" {
DATASET "hilbert" {
DATATYPE  H5T_ARRAY { [2] H5T_IEEE_F64LE }
DATASPACE  SIMPLE { ( 3, 3 ) / ( 3, 3 ) }
DATA {
(0,0): [ 1, -1 ], [ 0.5, -0.5 ], [ 0.333333, -0.333333 ],
(1,0): [ 0.5, -0.5 ], [ 0.333333, -0.333333 ], [ 0.25, -0.25 ],
(2,0): [ 0.333333, -0.333333 ], [ 0.25, -0.25 ], [ 0.2, -0.2 ]
}
}
}
}