在Java eclipse中阅读Tiff格式 [英] Read Tiff format in Java eclipse

问题描述

我如何使用Java IMAGEIO库读取TIFF图像？（我正在使用Eclipse Luna）..而且一旦我下载插件（JAR文件）如何给Classpath以便它可以读取我的输入TIFF图像文件？

How do i read a TIFF image using Java IMAGEIO library??(I am using Eclipse Luna)..And once i download the plugin(JAR files) how to give the Classpath so that it can read my input TIFF image file?

推荐答案

这是一个将TIFF图像转换为PNG图像的快速示例。

Here a quick example to convert a TIFF image into a PNG image.

// quick conversion example
File inputFile = new File("image.tiff");
File outputFile = new File("output.png");
BufferedImage image = ImageIO.read(inputFile);
ImageIO.write(image, "png", outputFile);

打印JAI ImageIO库所有支持格式的列表。

Print a list of all supported formats of the JAI ImageIO library.

import javax.imageio.ImageIO;
...
for (String format : ImageIO.getWriterFormatNames()) {
    System.out.println("format = " + format);
}

注意对于转换包含的图片格式没有内置支持，支持库必须在类路径中。要查找支持的格式，请查看 https://docs.oracle.com/ javase / tutorial / 2d / images / loadimage.html 或上面的代码段。

note For the convertion of image formats which have no built-in support a supporting library must be in the classpath. To find the supported formats check https://docs.oracle.com/javase/tutorial/2d/images/loadimage.html or the snippet above.

例如。对于TIFF，您可以使用 jai_imageio-1.1.jar （或< a href =https://mvnrepository.com/artifact/com.github.jai-imageio/jai-imageio-core\"rel =nofollow noreferrer> newer ）。

e.g. for TIFF you could use the jai_imageio-1.1.jar (or newer).

javac -cp jai_imageio-1.1.jar:. Main.java
java -cp jai_imageio-1.1.jar:. Main

如果类路径中没有TIFF格式支持库，则上述转换代码段失败并带有 java.lang.IllegalArgumentException：image == null！。

If no TIFF format supporting library is in the classpath the above convertion snippet fails with java.lang.IllegalArgumentException: image == null!.

以下格式具有内置支持（Java 8）

Following formats have built-in support (Java 8)

BMP
GIF
JPEG
PNG
WBMP

jai_imageio-1.1.jar 增加对

JPEG2000
PNM
RAW
TIFF

编辑随着时间的推移和Java 9的发布，这是一个小小的更新，因为Java 9现在支持TIFF。

edit As times goes by and Java 9 is released, a small update, because Java 9 supports TIFF now out of the box.

使用Java 9编译并运行，无需额外的库

compile and run with Java 9 without an additional library

import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
class TiffToPng {
    public static void main(String[] args) throws Exception {
        File inputFile = new File("image.tiff");
        File outputFile = new File("output.png");
        BufferedImage image = ImageIO.read(inputFile);
        ImageIO.write(image, "png", outputFile);
    }
}

查找支持 ImageReader / ImageWriter 格式。您可以在片段后使用的MIME类型

to find supported ImageReader / ImageWriter formats resp. MIME types you could use following snippets

for (String format : ImageIO.getReaderFormatNames()) {
    System.out.println("format = " + format);
}
...
for (String format : ImageIO.getReaderMIMETypes()) {
    System.out.println("format = " + format);
}


for (String format : ImageIO.getWriterFormatNames()) {
    System.out.println("format = " + format);
}
...
for (String format : ImageIO.getWriterMIMETypes()) {
    System.out.println("format = " + format);
}

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