Set image transparency on PDF file in Java

import com.spire.pdf.*;
import com.spire.pdf.graphics.*;
import java.awt.geom.*;
import java.awt.*;

public class ImageTransparency {
    public static void main(String[] args) {

        //Create a PDFDocument
        PdfDocument doc = new PdfDocument();
        //Add a section
        PdfSection section = doc.getSections().add();

        // Load image and set its width and height
        PdfImage image = PdfImage.fromFile("logo.png");
        double imageWidth = image.getPhysicalDimension().getWidth() / 3;
        double imageHeight = image.getPhysicalDimension().getHeight() / 3;

        //Add a page
        PdfPageBase page = section.getPages().add();
        float pageWidth = (float) page.getCanvas().getClientSize().getWidth();
        float y = 10;

        //Draw Title and set the font and format
        y = y + 5;
        PdfBrush brush = new PdfSolidBrush(new PdfRGBColor(new Color(255,69,0)));
        PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial", Font.BOLD,12));
        PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Center);
        String text = String.format(" Set image Transparency ");
        page.getCanvas().drawString(text, font, brush, pageWidth / 2, y, format);
        Dimension2D size = font.measureString(text, format);
        y = y + (float) size.getHeight() + 6;

        //Set image transparency
        page.getCanvas().setTransparency(0.2f, 0.2f, PdfBlendMode.Normal);

        //Add image to the page
        page.getCanvas().drawImage(image, 0, y, imageWidth, imageHeight);
        page.getCanvas().save();

        // Save pdf file.
        doc.saveToFile("output/Transparency.pdf");
        // Close pdf file
        doc.close();
    }
}