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Read all image metadata with Java

How to read all the metadata of an image (image format, width and height) in Java. We will the use the awesome metadata-extractor library.

1) Add the dependency

Add the following dependency to your pom.xml:

<dependency>
    <groupId>com.drewnoakes</groupId>
    <artifactId>metadata-extractor</artifactId>
    <version>2.15.0</version>
</dependency>

2) Read the image metadata

For this example, we will use an image from our own website, eazytutorial.com, but you can replace it with any other image that you load as a Java InputStream:

import com.drew.imaging.ImageMetadataReader;
import com.drew.metadata.*;
import java.io.*;
import java.net.URL;

String image = "https://eazytutorial.com/wp-content/uploads/2021/08/26_0.png";
URL url = new URL(image);
InputStream in = new BufferedInputStream(url.openStream());
Metadata metadata = ImageMetadataReader.readMetadata(in);

for (Directory d : metadata.getDirectories()) {
    System.out.println(d);
    System.out.println("---------------");
    for (Tag tag : d.getTags())
        System.out.println(tag);

    System.out.println();
}

In the console, you will get the following information:

PNG-IHDR Directory (7 tags)
---------------
[PNG-IHDR] Image Width - 700
[PNG-IHDR] Image Height - 413
[PNG-IHDR] Bits Per Sample - 8
[PNG-IHDR] Color Type - Indexed Color
[PNG-IHDR] Compression Type - Deflate
[PNG-IHDR] Filter Method - Adaptive
[PNG-IHDR] Interlace Method - No Interlace

PNG-gAMA Directory (1 tag)
---------------
[PNG-gAMA] Image Gamma - 0.455

PNG-sRGB Directory (1 tag)
---------------
[PNG-sRGB] sRGB Rendering Intent - Perceptual

PNG-PLTE Directory (1 tag)
---------------
[PNG-PLTE] Palette Size - 256

File Type Directory (4 tags)
---------------
[File Type] Detected File Type Name - PNG
[File Type] Detected File Type Long Name - Portable Network Graphics
[File Type] Detected MIME Type - image/png
[File Type] Expected File Name Extension - png

So we can see that our image’s format is PNG, the image width is 700 and the image height is 413.


That’s it for this tutorial ! Please leave a reply below if you have questions.

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