CImage:KwdGetValEx
The KwdGetValEx method returns a success code and the value of a keyword in the image header. The keyword may be any type of value: string, number, date, time, etc.
sValue, bSuccess = CImage:KwdGetValEx( sKwd ) |
sKwd is the keyword name.
sValue is the returned value of sKwd .
On success, bSuccess is true.
On failure, bSuccess is false and sValue is nil.
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, KwdGetVal returns only 1 parameter, which is the keyword value.
Suppose a CImage named I exists and contains keyword "FILTER", a string value, and "GAIN", a number value. The following script returns the value of FILTER and GAIN for the image I:
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-- gets the keyword if it exists |
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-- keyword exists |
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-- prints FILTER= 'Red' |
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-- gets the keyword if it exists |
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-- printf GAIN= 1.52 |
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