Information Technology Tips

Introduction In the previous post , I showed available tags in ExifTagConstants, TiffTagConstants, GpsTagConstants classes. In this post, I will show you code snippet for extracting metada from jpeg using the tags. In order to run example code, you should download commons-imaging.jar from here . Somehow the official homepage of Commons Imaging doesn't provide commons-imaging.jar!! Code package com.dulesoftware.image; import java.io.File; import java.io.IOException; import java.lang.reflect.Field; import java.lang.reflect.Modifier; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import org.apache.commons.imaging.ImageReadException; import org.apache.commons.imaging.Imaging; import org.apache.commons.imaging.common.IImageMetadata; import org.apache.commons.imaging.common.IImageMetadata.IImageMetadataItem; import org.apache.commons.imaging.formats.jpeg.JpegImageMetadata; import org.apache.commons.imaging.formats.t

Introduction In this Java: Read Image Metadata by Java Image IO post, I demonstrated the code snippet for reading image metadata only using standard java imageio library. The problem is the standard image library cannot read jpeg exif metadata as human readable format (they can be extracted as byte[] data). In this post, I will show you the code for reading jpeg exif metadata using Apache Commons Imaging library. In order to run the example code, you should download commons-imaging-1.0-SNAPSHOT.jar from commons-imaging . Basic of Read Exif Data Extracting jpeg exif metadata can be done by using findEXIFValue method in JpegImageMetadata class. The method takes TagInfo as an argument and return back TiffField . Available TagInfo static fields (constants) are mainly defined in the following class in org.apache.commons.imaging.formats.tiff.constants package: ExifTagConstants TiffTagConstants GpsTagConstants Available TagInfo in ExifTagConstants, TiffTagConstants, Gps