[Java] Simple Image Processing (ImageScalr)

ImageScalr Source: https://github.com/rkalla/imgscalr

1. Simple Image Processing

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import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Toolkit; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import javax.imageio.IIOImage; import javax.imageio.ImageIO; import javax.imageio.ImageWriteParam; import javax.imageio.ImageWriter; import javax.imageio.plugins.jpeg.JPEGImageWriteParam; import javax.imageio.stream.FileImageOutputStream; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import org.imgscalr.Scalr; import org.imgscalr.Scalr.Method; import org.imgscalr.Scalr.Mode; import org.imgscalr.Scalr.Rotation; import javafx.embed.swing.SwingFXUtils; import javafx.scene.input.Clipboard; public class ImageUtil { //-------------------------------------------------------------------------------- // BufferedImage //-------------------------------------------------------------------------------- public static BufferedImage create(int width, int height) { return new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); } public static BufferedImage load(String fileName) throws IOException { return ImageIO.read(new File(fileName)); } public static void saveToPng(BufferedImage image, String filename) throws IOException { ImageIO.write(image, "png", new File(filename)); } public static void saveToJpg(BufferedImage image, String filename) throws IOException { ImageIO.write(image, "jpg", new File(filename)); } public static void saveToJpg(BufferedImage image, String filename, float quality) throws IOException { JPEGImageWriteParam jpegParams = new JPEGImageWriteParam(null); jpegParams.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); jpegParams.setCompressionQuality(quality); final ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg").next(); writer.setOutput(new FileImageOutputStream(new File(filename))); writer.write(null, new IIOImage(image, null, null), jpegParams); } public static int getWidth(BufferedImage image) { return image.getWidth(); } public static int getHeight(BufferedImage image) { return image.getHeight(); } public BufferedImage getClipboardImage() { return SwingFXUtils.fromFXImage( Clipboard.getSystemClipboard().getImage(), null ); } //-------------------------------------------------------------------------------- // Scalr //-------------------------------------------------------------------------------- public static BufferedImage resize(BufferedImage image, int width, int height) { return Scalr.resize( image, Method.ULTRA_QUALITY, Mode.BEST_FIT_BOTH, width, height ); } public static BufferedImage resizeExact(BufferedImage image, int width, int height) { return Scalr.resize( image, Method.ULTRA_QUALITY, Mode.FIT_EXACT, width, height ); } public static BufferedImage resizeWidth(BufferedImage image, int width, int height) { return Scalr.resize( image, Method.ULTRA_QUALITY, Mode.FIT_TO_WIDTH, width, height ); } public static BufferedImage resizeHeight(BufferedImage image, int width, int height) { return Scalr.resize( image, Method.ULTRA_QUALITY, Mode.FIT_TO_HEIGHT, width, height ); } public static BufferedImage rotate90(BufferedImage image) { return Scalr.rotate(image, Rotation.CW_90); } public static BufferedImage rotate180(BufferedImage image) { return Scalr.rotate(image, Rotation.CW_180); } public static BufferedImage rotate270(BufferedImage image) { return Scalr.rotate(image, Rotation.CW_270); } public static BufferedImage rotateFlipHorizontally(BufferedImage image) { return Scalr.rotate(image, Rotation.FLIP_HORZ); } public static BufferedImage rotateFlipVertically(BufferedImage image) { return Scalr.rotate(image, Rotation.FLIP_VERT); } public static BufferedImage crop(BufferedImage image, int x, int y, int w, int h) { return Scalr.crop(image, x, y, w, h); } public static BufferedImage pad(BufferedImage image, int pad, Color color) { return Scalr.pad(image, pad, color); } //-------------------------------------------------------------------------------- // Graphics2D //-------------------------------------------------------------------------------- public static BufferedImage mergeHorizontally( BufferedImage[] images, int align ) { int width = 0; int height = 0; for( BufferedImage image : images ) { width += image.getWidth(); if( height < image.getHeight() ) { height = image.getHeight(); } } BufferedImage merged_image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics gr = merged_image.getGraphics(); width = 0; for( BufferedImage image : images ) { switch(align) { case -1: gr.drawImage(image, width, 0, null); break; case 0: gr.drawImage(image, width, (height-image.getHeight())/2, null); break; case 1: gr.drawImage(image, width, height-image.getHeight(), null); break; } width += image.getWidth(); } gr.dispose(); return merged_image; } public static BufferedImage mergeHorizontally( String[] files, int align ) throws IOException { BufferedImage[] images = new BufferedImage[files.length]; for( int i = 0; i < files.length; i++ ) { images[i] = ImageIO.read(new File(files[i])); } return mergeHorizontally( images, align ); } public static BufferedImage mergeHorizontally( BufferedImage[] images ) { return mergeHorizontally(images, -1); } public static BufferedImage mergeHorizontally( String[] files ) throws IOException { return mergeHorizontally(files, -1); } public static BufferedImage mergeVertically( BufferedImage[] images, int align ) { int width = 0; int height = 0; for( BufferedImage image : images ) { height += image.getHeight(); if( width < image.getWidth() ) { width = image.getWidth(); } } BufferedImage merged_image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics gr = merged_image.getGraphics(); height = 0; for( BufferedImage image : images ) { switch(align) { case -1: gr.drawImage(image, 0, height, null); break; case 0: gr.drawImage(image, (width-image.getWidth())/2, height, null); break; case 1: gr.drawImage(image, width-image.getWidth(), height, null); break; } height += image.getHeight(); } gr.dispose(); return merged_image; } public static BufferedImage mergeVertically( String[] files, int align ) throws IOException { BufferedImage[] images = new BufferedImage[files.length]; for( int i = 0; i < files.length; i++ ) { images[i] = ImageIO.read(new File(files[i])); } return mergeVertically( images, align ); } public static BufferedImage mergeVertically( BufferedImage[] images ) { return mergeVertically(images, -1); } public static BufferedImage mergeVertically( String[] files ) throws IOException { return mergeVertically(files, -1); } public static void drawLine(BufferedImage image, int x1, int y1, int x2, int y2, Color color) { Graphics2D g2 = image.createGraphics(); g2.setColor(color); g2.drawLine(x1,y1,x2,y2); g2.dispose(); } public static void drawRect(BufferedImage image, int x, int y, int w, int h, Color color) { Graphics2D g2 = image.createGraphics(); g2.setColor(color); g2.drawRect(x,y,w,h); g2.dispose(); } public static void drawRoundRect(BufferedImage image, int x, int y, int w, int h, Color color) { Graphics2D g2 = image.createGraphics(); g2.setColor(color); g2.drawRoundRect(x,y,w,h,4,4); g2.dispose(); } public static void clearRect(BufferedImage image, int x, int y, int w, int h, Color color) { Graphics2D g2 = image.createGraphics(); g2.setBackground(color); g2.drawRect(x,y,w,h); g2.dispose(); } public static void fillRect(BufferedImage image, int x, int y, int w, int h, Color color) { Graphics2D g2 = image.createGraphics(); g2.setColor(color); g2.fillRect(x,y,w,h); g2.dispose(); } public static void drawText(BufferedImage image, String text, int x, int y, Color color) { Graphics2D g2 = image.createGraphics(); g2.setColor(color); g2.drawString(text,x,y); g2.dispose(); } public static void drawImage(BufferedImage image, int x, int y) { Graphics2D g2 = image.createGraphics(); g2.drawImage(image,x,y,null); g2.dispose(); } public static void showImage(BufferedImage image, boolean undecorated) { JFrame frame = new JFrame(); ImageIcon icon = new ImageIcon(image); JLabel label = new JLabel(icon); Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); if(undecorated) { frame.setUndecorated(true); //removes the surrounding border } frame.getContentPane().add(label); frame.setSize(icon.getIconWidth(), icon.getIconHeight()); int x = (screenSize.width - frame.getSize().width)/2; int y = (screenSize.height - frame.getSize().height)/2; frame.setLocation(x, y); frame.pack(); frame.setVisible(true); } public static void showImage(BufferedImage image) { showImage( image, false ); } }