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Task 2.1 – Definition of data formats |
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The definition of data formats is important to facilitate
data exchange at all stages of the strain measurement and stress analysis
process. The SPOTS partners have
agreed on the use of the format described below during the course of the
project, with the intention of recommending it for use in an international
standard in the subject. The standard format will be ASCII for the exchange of all
types of data. The format of the ASCII
file is given below, with the format shown on the left and an example
provided on the right. For visualisation purposes only, 8-bit BMP files may also be
used exchanged. The use of a header
should be compulsory, but that it should provide the minimum information
required for data exchange. The
primary concern of the user will be to read the file. In additional information required for validation
and detailed interpretation could be included in a log file whose details
would be given in the header. To assist the user a pair of software tools are provided
to build (SPOTSBuilder)
and read (SPOTSReader)
the standard data set. These are
provided without instructions though their use should be intuitive especially
to LabView users.
The SPOTS partners accept no liability for the use or consequences
arising from the use of SPOTSBuilder and
SPOTSReader. |
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Standard File Format for Data Exchange |
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Description of line in file |
Example of file content |
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File Descriptor |
This is my
excellent data |
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Measurand (e.g.
intensity, phase, displacement, strain) |
shear strain |
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units of measurand
(AU-arbitrary units for intensity) |
m/m |
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no. of pixels in each row |
5 |
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no. of pixels in each column |
10 |
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pixel pitch at sample plane in row
(units: m) |
±0.001E±00 |
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pixel pitch at sample plane in column
(units: m) |
0±0.012E±00 |
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transformation
matrix for local to global axes r11
r21 r31 t1 |
1 1 1 0 |
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r12
r22 r32 t2 |
1 1 1 0 |
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r13
r23 r33 t3 |
1 1 1 0 |
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Fixed
last line of transformation matrix |
0 0 0 1 |
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End Of Header |
EOH |
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Data in rows with single space
delimiters. Masks indicated by
‘NAN’. Origin defined at bottom left
corner. |
±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 NAN ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 ±0.000E±00 |
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End Of File |
EOF |
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