使用PDFBox v2从PDF中提取TIFF

Question

It was possible to extract images including TIFF format using PDFBox v1.x. It is still possible to extract some formats with version 2.0.1 but it seems not to be working for TIFF format.

for (COSName c : page.getResources().getXObjectNames()) {
    PDXObject o = resources.getXObject(c);
    if (o instanceof PDImageXObject) {
        PDImageXObject image = (PDImageXObject) o;
        try (ByteArrayOutputStream bout = new ByteArrayOutputStream()) {
            ImageIO.write(image.getImage(), image.getSuffix(), bout);
            System.out.println("Image Bytes: " + bout.size());
        }
    }
}

ByteArrayOutputStream in above code has bytes for PNG and JPEG but nothing for TIFF. Any suggestions?

Thanks.

Answer 1

To extract PDF to the TIFF format, you need to include the jai_imageio library in the classpath.

I used the distribution from the geotoolkit repository, here is my pom.xml extract:

<repositories>
    <repository>
        <id>Geotoolkit</id>
        <name>Geotoolkit</name>
        <url>http://maven.geotoolkit.org/</url>
    </repository>
</repositories>

<dependencies>
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.3</version>
    </dependency>

    <!--required by PDFBox to create tiff images-->
    <dependency>
        <groupId>javax.media</groupId>
        <artifactId>jai_imageio</artifactId>
        <version>1.1.1</version>
    </dependency>
</dependencies>