出错转换DICOM至JPEG

Question

我是在代码工作的DICOM Iamge（.DCM）转换为JPEG格式 - 这是我使用的代码，它给了我一个：javax.imageio.spi.ImageReaderSpi中：提供com.sun.media.imageioimpl.plugins .pcx.PCXImageReaderSpi没有发现错误...

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Iterator;

import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;

import org.dcm4che.imageio.plugins.DcmImageReadParam;
import org.dcm4che.util.BufferedOutputStream;
import org.dcm4che2.imageio.plugins.dcm.DicomImageReadParam;
public class DicomToJpeg
{
    public static void main(String[] args)
    {
        //our DICOM file
        File my`enter code here`DicomFile = new File("IM-0001-0001.dcm");

    //declaring our JPEG image
    BufferedImage myJpegImage = null;

    //iterator containing all registered ImageReades that claim to decome the name format
    Iterator<ImageReader> iter= ImageIO.getImageReadersByFormatName("DICOM");

    //geting our ImageReader object
    ImageReader reader = (ImageReader) iter.next();

    //getting the parameters to read the DICOM image 
    DicomImageReadParam param = (DicomImageReadParam)reader.getDefaultReadParam();

    try
    {
        ImageInputStream iis = ImageIO.createImageInputStream(myDicomFile);
        reader.setInput(iis,false);
        myJpegImage = reader.read(0,param);
        iis.close();

        if(myJpegImage==null)
        {
            System.out.println("\nError: Couldn't read teh dicom image!");
            return;
        }

        File myJpegFile = new File("OutputJpegImage.jpg");
        OutputStream output = new BufferedOutputStream( new FileOutputStream(myJpegFile));
        ImageIO.write(myJpegImage, "jpeg", output);
        output.close();
    }
    catch (IOException e) 
    {
           System.out.println("\nError: couldn't read dicom image!"+ e.getMessage());
           return;
    }
}

}

这是我收到的错误？任何想法，我缺少什么

Exception in thread "main" java.util.ServiceConfigurationError: javax.imageio.spi.ImageReaderSpi:   Provider com.sun.media.imageioimpl.plugins.pcx.PCXImageReaderSpi not found
    at java.util.ServiceLoader.fail(Unknown Source)
    at java.util.ServiceLoader.access$300(Unknown Source)
    at java.util.ServiceLoader$LazyIterator.next(Unknown Source)
    at java.util.ServiceLoader$1.next(Unknown Source)
    at javax.imageio.spi.IIORegistry.registerApplicationClasspathSpis(Unknown Source)
    at javax.imageio.spi.IIORegistry.<init>(Unknown Source)
    at javax.imageio.spi.IIORegistry.getDefaultInstance(Unknown Source)
    at javax.imageio.ImageIO.<clinit>(Unknown Source)
    at dcm4chee.DicomToJpeg.main(DicomToJpeg.java:29)

Answer 1

某处在你的classpath，你的避风港（一个JAR中的文件或资源）的条目，命名为：

/META-INF/services/javax.imageio.spi.ImageReaderSpi

...含有（至少）的行：

com.sun.media.imageioimpl.plugins.pcx.PCXImageReaderSpi

每当ImageIO被初始化，或ImageIO.scanForPlugins()的调用由，在IIORegistry/ServiceLoader将扫描匹配上面的名称资源类路径。对于这个文件/资源​​的每一行，它会尝试与给定的名称（通常是服务提供商）将类实例。如果类不能被发现，或者不能被实例化（访问保护，缺少构造等），这将失败，ServiceConfigurationError。

例如见this link以获取更多信息。

要解决，您可能需要删除的文件或包含资源的JAR（或编辑出来的jar），或删除含有不良服务提供商行。此外，服务提供商添加到您的类路径（我认为这是正常的JAR称为jai_imageio.jar）。但我不认为你需要PCX（ZSOFT画笔格式）支持DICOM解码。

Answer 2

static
{
    for (Iterator<urclass> im = ServiceLoader.load(urclass.class).iterator(); im.hasNext();)
        try
        {
            urclass tclass = im.next();
        }
        catch (ServiceConfigurationError e)
        {
        }
}

这是查找未在JRE完成，并允许不能被实例化类的样本。