L'édition jpeg EXIF de données avec Java

Apache commons Imagerie fonctionne pour moi.

J'ai étendu l'échantillon fourni ici

Alors, évidemment, mon client code ressemble à ceci

public static void main(String[] args) throws ImageWriteException, ImageReadException, IOException {
    new WriteExifMetadataExample().changeExifMetadata(new File("somefilename.jpg"), new File("result_file.jpg"));
}

et la prolongation de la méthode dans WriteExifMetadataExample

public void changeExifMetadata(final File jpegImageFile, final File dst)
throws IOException, ImageReadException, ImageWriteException {
OutputStream os = null;
boolean canThrow = false;
try {
TiffOutputSet outputSet = null;
//note that metadata might be null if no metadata is found.
final ImageMetadata metadata = Imaging.getMetadata(jpegImageFile);
final JpegImageMetadata jpegMetadata = (JpegImageMetadata) metadata;
if (null != jpegMetadata) {
//note that exif might be null if no Exif metadata is found.
final TiffImageMetadata exif = jpegMetadata.getExif();
if (null != exif) {
//TiffImageMetadata class is immutable (read-only).
//TiffOutputSet class represents the Exif data to write.
//
//Usually, we want to update existing Exif metadata by
//changing
//the values of a few fields, or adding a field.
//In these cases, it is easiest to use getOutputSet() to
//start with a "copy" of the fields read from the image.
outputSet = exif.getOutputSet();
}
}
//if file does not contain any exif metadata, we create an empty
//set of exif metadata. Otherwise, we keep all of the other
//existing tags.
if (null == outputSet) {
outputSet = new TiffOutputSet();
}
{
//Example of how to add a field/tag to the output set.
//
//Note that you should first remove the field/tag if it already
//exists in this directory, or you may end up with duplicate
//tags. See above.
//
//Certain fields/tags are expected in certain Exif directories;
//Others can occur in more than one directory (and often have a
//different meaning in different directories).
//
//TagInfo constants often contain a description of what
//directories are associated with a given tag.
//
final TiffOutputDirectory exifDirectory = outputSet
.getOrCreateExifDirectory();
//make sure to remove old value if present (this method will
//not fail if the tag does not exist).
exifDirectory
.removeField(ExifTagConstants.EXIF_TAG_APERTURE_VALUE);
exifDirectory.add(ExifTagConstants.EXIF_TAG_APERTURE_VALUE,
new RationalNumber(3, 10));
}
{
//Example of how to add/update GPS info to output set.
//New York City
final double longitude = -74.0; //74 degrees W (in Degrees East)
final double latitude = 40 + 43 / 60.0; //40 degrees N (in Degrees
//North)
outputSet.setGPSInDegrees(longitude, latitude);
}
final TiffOutputDirectory exifDirectory = outputSet
.getOrCreateRootDirectory();
exifDirectory
.removeField(ExifTagConstants.EXIF_TAG_SOFTWARE);
exifDirectory.add(ExifTagConstants.EXIF_TAG_SOFTWARE,
"SomeKind");
os = new FileOutputStream(dst);
os = new BufferedOutputStream(os);
new ExifRewriter().updateExifMetadataLossless(jpegImageFile, os,
outputSet);
canThrow = true;
} finally {
IoUtils.closeQuietly(canThrow, os);
}
}

S'il vous plaît prêter attention à la ligne où j'ai ajouter des tag

final TiffOutputDirectory exifDirectory = outputSet
.getOrCreateRootDirectory();
exifDirectory
.removeField(ExifTagConstants.EXIF_TAG_SOFTWARE);
exifDirectory.add(ExifTagConstants.EXIF_TAG_SOFTWARE,
"SomeKind");

comme un résultat EXIF tag a été correctement ajouté

---

De changer le tag commentaire vous pouvez effectuer les opérations suivantes

        final TiffOutputDirectory exifDirectory = outputSet.getOrCreateRootDirectory();
exifDirectory.removeField(MicrosoftTagConstants.EXIF_TAG_XPCOMMENT);
exifDirectory.add(MicrosoftTagConstants.EXIF_TAG_XPCOMMENT, "SomeKind");

la liste complète des constantes disponibles dans le package:

org.apache.commons.imaging.formats.tiff.constants

OriginalL'auteur yurko

De changer le tag commentaire vous pouvez effectuer les opérations suivantes

        final TiffOutputDirectory exifDirectory = outputSet.getOrCreateRootDirectory();
exifDirectory.removeField(MicrosoftTagConstants.EXIF_TAG_XPCOMMENT);
exifDirectory.add(MicrosoftTagConstants.EXIF_TAG_XPCOMMENT, "SomeKind");

la liste complète des constantes disponibles dans le package:

org.apache.commons.imaging.formats.tiff.constants

OriginalL'auteur yurko