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sergio41sergio41
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[BAEL-4240] Adding Text to an Image in Java (eugenp#9642)
* [BAEL-4240] Code Upload * [BAEL-4240] Remove double space * [BAEL-4240] Adapting Text to the image * [BAEL-4240] Package rename
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  • image-processing/src/main/java/com/baeldung/imageprocessing/addingtext

‎image-processing/src/main/java/com/baeldung/imageprocessing/addingtext/AddText.java‎

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package com.baeldung.imageprocessing.addingtext;
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import ij.IJ;
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import ij.ImagePlus;
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import ij.process.ImageProcessor;
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import java.awt.*;
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import java.awt.font.GlyphVector;
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import java.awt.font.TextAttribute;
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import java.awt.image.BufferedImage;
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import java.io.File;
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import java.io.IOException;
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import java.text.AttributedString;
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import javax.imageio.ImageIO;
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public class AddText {
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public static void main(String[] args) throws IOException {
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String imagePath = AddText.class.getClassLoader().getResource("lena.jpg").getPath();
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ImagePlus resultPlus= signImageImageProcessor("www.baeldung.com", imagePath);
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resultPlus.show();
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ImagePlus resultGraphics = new ImagePlus("", signImageGraphics("www.baeldung.com", imagePath));
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resultGraphics.show();
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ImagePlus resultGraphicsWithIterator = new ImagePlus("", signImageGraphicsWithIterator("www.baeldung.com", imagePath));
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resultGraphicsWithIterator.show();
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ImagePlus resultGraphicsCentered = new ImagePlus("", signImageCenter("www.baeldung.com", imagePath));
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resultGraphicsCentered.show();
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ImagePlus resultGraphicsBottomRight = new ImagePlus("", signImageBottomRight("www.baeldung.com", imagePath));
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resultGraphicsBottomRight.show();
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ImagePlus resultGraphicsTopLeft= new ImagePlus("", signImageTopLeft("www.baeldung.com", imagePath));
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resultGraphicsTopLeft.show();
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ImagePlus resultGraphicsAdaptBasedOnImage= new ImagePlus("", signImageAdaptBasedOnImage("www.baeldung.com", imagePath));
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resultGraphicsAdaptBasedOnImage.show();
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}
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private static ImagePlus signImageImageProcessor(String text, String path) {
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ImagePlus image = IJ.openImage(path);
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Font font = new Font("Arial", Font.BOLD, 18);
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ImageProcessor ip = image.getProcessor();
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ip.setColor(Color.GREEN);
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ip.setFont(font);
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ip.drawString(text, 0, 20);
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return image;
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}
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private static BufferedImage signImageGraphics(String text, String path) throws IOException {
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BufferedImage image = ImageIO.read(new File(path));
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Font font = new Font("Arial", Font.BOLD, 18);
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Graphics g = image.getGraphics();
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g.setFont(font);
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g.setColor(Color.GREEN);
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g.drawString(text, 0, 20);
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return image;
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}
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private static BufferedImage signImageGraphicsWithIterator(String text, String path) throws IOException {
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BufferedImage image = ImageIO.read(new File(path));
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Font font = new Font("Arial", Font.BOLD, 18);
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AttributedString attributedText = new AttributedString(text);
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attributedText.addAttribute(TextAttribute.FONT, font);
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attributedText.addAttribute(TextAttribute.FOREGROUND, Color.GREEN);
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Graphics g = image.getGraphics();
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g.drawString(attributedText.getIterator(), 0, 20);
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return image;
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}
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/**
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* Draw a String centered in the middle of a Rectangle.
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*
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* @param g The Graphics instance.
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* @param text The String to draw.
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* @param rect The Rectangle to center the text in.
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* @throws IOException
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*/
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public static BufferedImage signImageCenter(String text, String path) throws IOException {
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BufferedImage image = ImageIO.read(new File(path));
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Font font = new Font("Arial", Font.BOLD, 18);
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AttributedString attributedText = new AttributedString(text);
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attributedText.addAttribute(TextAttribute.FONT, font);
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attributedText.addAttribute(TextAttribute.FOREGROUND, Color.GREEN);
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Graphics g = image.getGraphics();
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FontMetrics metrics = g.getFontMetrics(font);
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int positionX = (image.getWidth() - metrics.stringWidth(text)) / 2;
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int positionY = (image.getHeight() - metrics.getHeight()) / 2 + metrics.getAscent();
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g.drawString(attributedText.getIterator(), positionX, positionY);
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return image;
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}
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/**
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* Draw a String centered in the middle of a Rectangle.
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*
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* @param g The Graphics instance.
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* @param text The String to draw.
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* @param rect The Rectangle to center the text in.
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* @throws IOException
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*/
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public static BufferedImage signImageBottomRight(String text, String path) throws IOException {
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BufferedImage image = ImageIO.read(new File(path));
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Font font = new Font("Arial", Font.BOLD, 18);
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AttributedString attributedText = new AttributedString(text);
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attributedText.addAttribute(TextAttribute.FONT, font);
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attributedText.addAttribute(TextAttribute.FOREGROUND, Color.GREEN);
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Graphics g = image.getGraphics();
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FontMetrics metrics = g.getFontMetrics(font);
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int positionX = (image.getWidth() - metrics.stringWidth(text));
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int positionY = (image.getHeight() - metrics.getHeight()) + metrics.getAscent();
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g.drawString(attributedText.getIterator(), positionX, positionY);
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return image;
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}
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/**
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* Draw a String centered in the middle of a Rectangle.
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*
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* @param g The Graphics instance.
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* @param text The String to draw.
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* @param rect The Rectangle to center the text in.
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* @throws IOException
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*/
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public static BufferedImage signImageTopLeft(String text, String path) throws IOException {
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BufferedImage image = ImageIO.read(new File(path));
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Font font = new Font("Arial", Font.BOLD, 18);
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AttributedString attributedText = new AttributedString(text);
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attributedText.addAttribute(TextAttribute.FONT, font);
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attributedText.addAttribute(TextAttribute.FOREGROUND, Color.GREEN);
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Graphics g = image.getGraphics();
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FontMetrics metrics = g.getFontMetrics(font);
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int positionX = 0;
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int positionY = metrics.getAscent();
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g.drawString(attributedText.getIterator(), positionX, positionY);
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return image;
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}
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/**
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* Draw a String centered in the middle of a Rectangle.
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*
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* @param g The Graphics instance.
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* @param text The String to draw.
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* @param rect The Rectangle to center the text in.
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* @throws IOException
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*/
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public static BufferedImage signImageAdaptBasedOnImage(String text, String path) throws IOException {
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BufferedImage image = ImageIO.read(new File(path));
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Font font = createFontToFit(new Font("Arial", Font.BOLD, 80), text, image);
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AttributedString attributedText = new AttributedString(text);
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attributedText.addAttribute(TextAttribute.FONT, font);
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attributedText.addAttribute(TextAttribute.FOREGROUND, Color.GREEN);
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Graphics g = image.getGraphics();
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FontMetrics metrics = g.getFontMetrics(font);
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int positionX = (image.getWidth() - metrics.stringWidth(text));
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int positionY = (image.getHeight() - metrics.getHeight()) + metrics.getAscent();
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g.drawString(attributedText.getIterator(), positionX, positionY);
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return image;
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}
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public static Font createFontToFit(Font baseFont, String text, BufferedImage image) throws IOException
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{
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Font newFont = baseFont;
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FontMetrics ruler = image.getGraphics().getFontMetrics(baseFont);
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GlyphVector vector = baseFont.createGlyphVector(ruler.getFontRenderContext(), text);
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Shape outline = vector.getOutline(0, 0);
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double expectedWidth = outline.getBounds().getWidth();
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double expectedHeight = outline.getBounds().getHeight();
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boolean textFits = image.getWidth() >= expectedWidth && image.getHeight() >= expectedHeight;
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if(!textFits) {
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double widthBasedFontSize = (baseFont.getSize2D()*image.getWidth())/expectedWidth;
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double heightBasedFontSize = (baseFont.getSize2D()*image.getHeight())/expectedHeight;
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double newFontSize = widthBasedFontSize < heightBasedFontSize ? widthBasedFontSize : heightBasedFontSize;
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newFont = baseFont.deriveFont(baseFont.getStyle(), (float)newFontSize);
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}
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return newFont;
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}
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}

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