I wouldn't count on Windows Explorer to give you the right values.
Rather check it against exiftool
(www.sno.phy.queensu.ca/~phil/exiftool/):
exiftool -a -g1 -u image.tiff
Windows Explorer also likes the "XP" values (eg. EXIF_TAG_XPCOMMENT,
EXIF_TAG_XPAUTHOR), maybe try writing those as well?
Damjan
Sorry for asking so many questions :( I hope it is okay.
Hmm. It does not seem like the XP values work. They do not show correctly.
Anyways, I tried using the code I sent you without special characters:
byte[] bytesComment =
ExifTagConstants.EXIF_TAG_USER_COMMENT.encodeValue(TiffFieldTypeConstants.FIELD_TYPE_ASCII,
"KasperComment", set.byteOrder);
byte[] bytesAuthor =
TiffTagConstants.TIFF_TAG_ARTIST.encodeValue(TiffFieldTypeConstants.FIELD_TYPE_ASCII,
"KasperAuthor", set.byteOrder);
TiffOutputField commentField = new
TiffOutputField(ExifTagConstants.EXIF_TAG_USER_COMMENT,
ExifTagConstants.EXIF_TAG_USER_COMMENT.dataTypes[0],
bytesComment.length, bytesComment);
TiffOutputField authorField = new
TiffOutputField(TiffTagConstants.TIFF_TAG_ARTIST,
TiffTagConstants.TIFF_TAG_ARTIST.dataTypes[0], bytesAuthor.length,
bytesAuthor);
set.getOrCreateExifDirectory().add(commentField);
set.getOrCreateRootDirectory().add(authorField);
Then the exif tools shows (and so do windows explorer):
---- IFD0 ----
Artist : KasperAuthor
---- ExifIFD ----
User Comment : KasperComment
---- JFIF ----
JFIF Version : 1.01
However, trying the same, but adding an å to KasperComment and
KasperAuthor gives the following:
---- IFD0 ----
Artist : KasperAuthorå
---- ExifIFD ----
User Comment : 䭡獰敲䍯浭敮瓃
---- JFIF ----
JFIF Version : 1.01
It seems the UserComment has been destroyed. Now it is suddenly chinese
characters!?
Windows explorer shows the artist but not the usercomment.
Is this something to do with ExifDirectory vs RootDirectory?
/Kasper
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