java - 如何使用 im4java 调整缓冲图像的大小并将输出作为 bufferedImage？

Question

当我尝试调整图像大小时，出现异常“java.lang.IllegalStateException:给定格式没有 ImageReader”。

 public static void main(String... args) throws Exception {   
        IMOperation op = new IMOperation();
        op.addImage();                       
        op.resize(350)
        op.addImage()               
        BufferedImage images = ImageIO.read(new File("image.jpg")); 

        // set up command
        ConvertCmd convert = new ConvertCmd();
        Stream2BufferedImage s2b = new Stream2BufferedImage();
        convert.setOutputConsumer(s2b);

        // run command and extract BufferedImage from OutputConsumer
        convert.run(op,images);
        BufferedImage img = s2b.getImage();
    }

Answer 1

伙计们，我已经解决了这个问题。实际上我必须指定输出图像的图像类型

public static void main(String... args) throws Exception {   
           IMOperation op = new IMOperation();
            op.addImage();                       
            op.resize(350)
            op.addImage("jpg:-")               
            BufferedImage images = ImageIO.read(new File("image.jpg")); 

            // set up command
            ConvertCmd convert = new ConvertCmd();
            Stream2BufferedImage s2b = new Stream2BufferedImage();
            convert.setOutputConsumer(s2b);

            // run command and extract BufferedImage from OutputConsumer
            convert.run(op,images);
            BufferedImage img = s2b.getImage();
        }