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CImage:KwdGetNumEx
The KwdGetNumEx method returns a success code and the value of a numeric keyword in the image header.
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nValue, bSuccess = CImage:KwdGetNumEx( sKwd ) |
sKwd is the keyword to read.
nValue is the returned value of sKwd .
On success,
bSuccess is true.
On failure,
bSuccess is false and nValue is
0.
This method returns a boolean success code that tells if the keyword exists in the image header. If true, then the keyword value is also returned. Alternatively, KwdGetNum returns only 1 parameter, which is the keyword value.
Suppose a CImage named I exists and contains keyword "DARKTIME". The following script fragment returns the value of DARKTIME for the image I:
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t, bOK = I:KwdGetNumEx("DARKTIME") |
-- does the keyword exist? |
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if ( bOK ) then |
-- keyword exists |
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Printf( "Darktime= %lg sec", t ) |
-- print the value |
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end |
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