JavaでマルチページTiffを作成する

Question

私はtif画像を撮り、可能であればTwelve Monkeys画像ライブラリを使用して、Javaでテキストを含むレイヤーを追加することに興味があります。

hereのコードを調整して、テキストをtifに追加するか、同じサイズの新しいtifをテキストのみで作成しますが、複数ページのtifとして保存することはできません。たとえば：

import javax.imageio.*; 
import javax.imageio.stream.ImageOutputStream; 
import java.awt.*; 
import java.awt.image.*; 
import java.io.*; 

public class ImageUtil { 

public static void main(String[] args) throws Exception { 

    BufferedImage src = ImageIO.read(new File("/path/to/main.tif")); 
    BufferedImage text = createTextLayer(src); 
    BufferedImage[] images = new BufferedImage[]{src, text}; 
    createMultiPage(images); 

} 

private static BufferedImage createTextLayer(BufferedImage src) { 
    int w = src.getWidth(); 
    int h = src.getHeight(); 
    BufferedImage img = new BufferedImage(
      w, h, BufferedImage.TYPE_INT_ARGB); 

    Graphics2D g2d = img.createGraphics(); 
    g2d.drawImage(img, 0, 0, null); 

    g2d.setPaint(Color.red); 
    g2d.setFont(new Font("Serif", Font.BOLD, 200)); 
    String s = "Hello, world!"; 
    FontMetrics fm = g2d.getFontMetrics(); 
    int x = img.getWidth() - fm.stringWidth(s) - 5; 
    int y = fm.getHeight() * 5; 
    g2d.drawString(s, x, y); 
    g2d.dispose(); 
    return img; 
} 

private static void createMultiPage(BufferedImage[] images) throws IOException { 

    File tempFile = new File("/new/file/path.tif"); 
    //I also tried passing in stream var below to the try, but also receive java.lang.UnsupportedOperationException: Unsupported write variant! 
    //OutputStream stream = new FileOutputStream(tempFile); 

    // Obtain a TIFF writer 
    ImageWriter writer = ImageIO.getImageWritersByFormatName("TIFF").next(); 

    try (ImageOutputStream output = ImageIO.createImageOutputStream(tempFile)) { 
     writer.setOutput(output); 

     ImageWriteParam params = writer.getDefaultWriteParam(); 
     params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 
     params.setCompressionType("None"); 

     //error here: java.lang.UnsupportedOperationException: Unsupported write variant! 
     writer.prepareWriteSequence(null); 

     for (int i = 0; i < images.length; i++){ 
      writer.writeToSequence(new IIOImage(images[i], null, null), params); 
     } 

     // We're done 
     writer.endWriteSequence(); 
    } 

} 
} 

のMaven：

<dependency> 
    <groupId>com.twelvemonkeys.imageio</groupId> 
    <artifactId>imageio-tiff</artifactId> 
    <version>3.2.1</version> 
</dependency> 

はどのようにして、画像と生成されたテキスト、画像から複数ページのTIFを作成することができますか？

jpgsのために次のコードを実行できましたが、jpgsにはレイヤーがありません。

public static void testWriteSequence() throws IOException { 
    BufferedImage[] images = new BufferedImage[] { 
      new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB), 
      new BufferedImage(110, 100, BufferedImage.TYPE_INT_RGB), 
      new BufferedImage(120, 100, BufferedImage.TYPE_INT_RGB), 
      new BufferedImage(130, 100, BufferedImage.TYPE_INT_RGB) 
    }; 

    Color[] colors = {Color.BLUE, Color.GREEN, Color.RED, Color.ORANGE}; 

    for (int i = 0; i < images.length; i++) { 
     BufferedImage image = images[i]; 
     Graphics2D g2d = image.createGraphics(); 
     try { 
      g2d.setColor(colors[i]); 
      g2d.fillRect(0, 0, 100, 100); 
     } 
     finally { 
      g2d.dispose(); 
     } 
    } 

    //ImageWriter writer = createImageWriter(); 
    ImageWriter writer = ImageIO.getImageWritersByFormatName("JPEG").next(); 

    ByteArrayOutputStream buffer = new ByteArrayOutputStream(); 
    try (ImageOutputStream output = ImageIO.createImageOutputStream(buffer)) { 
     writer.setOutput(output); 

     ImageWriteParam params = writer.getDefaultWriteParam(); 
     params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 

     writer.prepareWriteSequence(null); 

     params.setCompressionType("JPEG"); 
     writer.writeToSequence(new IIOImage(images[0], null, null), params); 

     params.setCompressionType("JPEG"); 
     writer.writeToSequence(new IIOImage(images[1], null, null), params); 

     params.setCompressionType("JPEG"); 
     writer.writeToSequence(new IIOImage(images[2], null, null), params); 

     params.setCompressionType("JPEG"); 
     writer.writeToSequence(new IIOImage(images[3], null, null), params); 

     writer.endWriteSequence(); 

     File tempFile = new File("/path/to/new/file.jpg"); 
     OutputStream out = new FileOutputStream(tempFile); 

     buffer.writeTo(out); 
    } 
} 

ありがとうございます。

Answer 1

標準のImageIO APIを使用して、複数ページの画像（TIFFのような形式）を書き込むことができます。

TwelveMonkeys ImageIOプロジェクトのテストケースのTIFFImageWriterTest.testWriteSequenceメソッド（例）の例を参照してください。

重要な部分：

BufferedImage[] images = ... 
OutputStream stream = ... 

// Obtain a TIFF writer 
ImageWriter writer = ImageIO.getImageWritersByFormatName("TIFF").next(); 

try (ImageOutputStream output = ImageIO.createImageOutputStream(stream)) { 
    writer.setOutput(output); 

    ImageWriteParam params = writer.getDefaultWriteParam(); 
    params.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 

    writer.prepareWriteSequence(null); 

    // This is from the test case, you probably want to replace this with a for loop... 
    // ...and use a single compression type for all the images. 
    params.setCompressionType("JPEG"); 
    writer.writeToSequence(new IIOImage(images[0], null, null), params); 

    params.setCompressionType("None"); 
    writer.writeToSequence(new IIOImage(images[1], null, null), params); 

    params.setCompressionType("None"); 
    writer.writeToSequence(new IIOImage(images[2], null, null), params); 

    params.setCompressionType("PackBits"); 
    writer.writeToSequence(new IIOImage(images[3], null, null), params); 

    // We're done 
    writer.endWriteSequence(); 
}