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#1039 Fixed typos in r3621

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Robin Mills 2015-03-11 16:03:38 +00:00
parent 6897087279
commit df3959ed13
1 changed files with 5 additions and 6 deletions
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src/exiv2.1
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@ -440,18 +440,17 @@ Examples:
exiv2 "-Mset Exif.Photo.MaxApertureValue F5.6" X.jpg
.sp 1
The format Fnumber is for the convenience of setting aperture values.
The aperture value stored in Exif is an \fBAPEX\fP number which can be evaluated by the expression::
The aperture value stored in Exif is an \fBAPEX\fP value which can be evaluated by the expression:
.br
apex-value = 2 * log(Fnumber) / log(2)
apex-value = log(Fnumber) * 2.0 / log(2.0)
.br
Fnumber = exp(log(2.0) * apex-value / 2
Fnumber = exp(apex-value * log(2.0) / 2.0)
.sp 1
The Fnumber syntax is valid for any \fBRational\fP, even when the key is not an Aperture.
.br
More information about \fBAPEX\fP is available from: http://en.wikipedia.org/wiki/APEX_system
More information about \fBAPEX\fP value is available from: http://en.wikipedia.org/wiki/APEX_system
.sp 1
The format of XMP \fBLangAlt\fP values includes an optional language
qualifier:
The format of XMP \fBLangAlt\fP values includes an optional language qualifier:
.sp 1
.B [lang=\fIlanguage-code\fP ]\fItext\fP
.sp 1