Apache Tika Support in JDeli

Reading image metadata in Java is now possible thanks to Apache Tika support in JDeli. With the new release of  JDeli 2023.03 which includes two plugins for Apache Tika.

You can download JDeli here to try for yourself.

Image metadata extraction

Using JDeli, you can read image metadata from a range of different formats.

We currently support the following:

• BMP
• GIF
• HEIC/HEIF
• JPEG
• JPX/JP2
• PNG
• TIFF
• WebP

To get started, we pass a TikaInputStream, along with a ContentHandler and Metadata objects, to the MetadataParser.

TikaInputStream tik = TikaInputStream.get(Paths.get("file.img"));
MetadataParser parser = new MetadataParser(); 
ToXMLContentHandler xmlH = new ToXMLContentHandler();
Metadata metadata = new Metadata();
parser.parse(tik, xmlH, metadata, null);

The result is stored in the content handler as an HTML table where each column is a metadata attribute.

More information about image metadata extraction available on our support site.

Image format detection

Using an ImageDetector, you can detect an image’s MIME Type:

ImageDetector detector = new ImageDetector();
MediaType mimeType = detector.detect(TikaInputStream.get(Paths.get("file.img")), null);

You can then do MediaType.getSubtype() to find out the image format.

More information about image format detection available on our support site.

Download JDeli

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// Read an image
BufferedImage bufferedImage = JDeli.read(dicomImageFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(heicImageFile);

// Write an image
JDeli.write(bufferedImage, "heic", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(jpegImageFile);

// Write an image
JDeli.write(bufferedImage, "jpeg", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(jpeg2000ImageFile);

// Write an image
JDeli.write(bufferedImage, "jpx", outputStreamOrFile);

// Write an image
JDeli.write(bufferedImage, "pdf", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(pngImageFile);

// Write an image
JDeli.write(bufferedImage, "png", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(tiffImageFile);

// Write an image
JDeli.write(bufferedImage, "tiff", outputStreamOrFile);

// Read an image
BufferedImage bufferedImage = JDeli.read(webpImageFile);

// Write an image
JDeli.write(bufferedImage, "webp", outputStreamOrFile);