我对使用Java添加带有文本的图层到TIF图像很感兴趣,最好使用Twelve Monkeys图像库。我可以从这里的代码进行调整,将文本添加到TIF中或创建一个大小相同但只包含文本的新TIF,但无法将它们保存为多页TIF。例如:
如何从图像和生成的文本图像创建多页tif?
我已经成功运行了以下jpg代码,但是jpg没有层。
谢谢。
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();
}
}
}
Maven:
<dependency>
<groupId>com.twelvemonkeys.imageio</groupId>
<artifactId>imageio-tiff</artifactId>
<version>3.2.1</version>
</dependency>
如何从图像和生成的文本图像创建多页tif?
我已经成功运行了以下jpg代码,但是jpg没有层。
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);
}
}
谢谢。