要转换pdf文件，我使用了pdf2dcm.java类。但是，现在我需要将dicom文件转换为pdf以便读取文档的内容。怎么做？是否有任何java类能够做到这一点？
答案 0 :(得分：0)
Dcm4che拥有您正在寻找的东西。请查看https://sourceforge.net/projects/dcm4che/
答案 1 :(得分：0)
首先，您可以将DCM转换为jpg，然后将JPG转换为PDF
import java.io.File;
import java.io.IOException;
public class DCM2JPG_Convert {
public static void main(String[] args) throws IOException {
try{
File src = new File("d:\\CHESTP.dcm");
File dest = new File("d:\\CHEST_PA12.jpg");
Dcm2Jpeg dcm2jpg= new Dcm2Jpeg();
dcm2jpg.convert(src, dest);
System.out.println("Completed");
}catch(Exception e){
e.printStackTrace();
}
}
}
import java.awt.image.BufferedImage;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.Iterator;
import java.util.List;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.dcm4che2.data.DicomObject;
import org.dcm4che2.imageio.plugins.dcm.DicomImageReadParam;
import org.dcm4che2.io.DicomInputStream;
import org.dcm4che2.util.CloseUtils;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
public class Dcm2Jpeg {
private static final String USAGE =
"dcm2jpg [Options] <dcmfile> <jpegfile>\n" +
"or dcm2jpg [Options] <dcmfile>... <outdir>\n" +
"or dcm2jpg [Options] <indir>... <outdir>";
private static final String DESCRIPTION =
"Convert DICOM image(s) to JPEG(s)\nOptions:";
private static final String EXAMPLE = null;
private int frame = 1;
private float center;
private float width;
private String vlutFct;
private boolean autoWindowing;
private DicomObject prState;
private short[] pval2gray;
private String fileExt = ".jpg";
private void setFrameNumber(int frame) {
this.frame = frame;
}
private void setWindowCenter(float center) {
this.center = center;
}
private void setWindowWidth(float width) {
this.width = width;
}
public final void setVoiLutFunction(String vlutFct) {
this.vlutFct = vlutFct;
}
private final void setAutoWindowing(boolean autoWindowing) {
this.autoWindowing = autoWindowing;
}
private final void setPresentationState(DicomObject prState) {
this.prState = prState;
}
private final void setPValue2Gray(short[] pval2gray) {
this.pval2gray = pval2gray;
}
public final void setFileExt(String fileExt) {
this.fileExt = fileExt;
}
public void convert(File src, File dest) throws IOException {
Iterator<ImageReader> iter = ImageIO.getImageReadersByFormatName("DICOM");
ImageReader reader = iter.next();
DicomImageReadParam param =
(DicomImageReadParam) reader.getDefaultReadParam();
param.setWindowCenter(center);
param.setWindowWidth(width);
param.setVoiLutFunction(vlutFct);
param.setPresentationState(prState);
param.setPValue2Gray(pval2gray);
param.setAutoWindowing(autoWindowing);
ImageInputStream iis = ImageIO.createImageInputStream(src);
BufferedImage bi;
OutputStream out = null;
try {
reader.setInput(iis, false);
bi = reader.read(frame - 1, param);
if (bi == null) {
System.out.println("\nError: " + src + " - couldn't read!");
return;
}
out = new BufferedOutputStream(new FileOutputStream(dest));
JPEGImageEncoder enc = JPEGCodec.createJPEGEncoder(out);
enc.encode(bi);
} finally {
CloseUtils.safeClose(iis);
CloseUtils.safeClose(out);
}
//System.out.print('.');
}
public int mconvert(List<String> args, int optind, File destDir)
throws IOException {
int count = 0;
for (int i = optind, n = args.size() - 1; i < n; ++i) {
File src = new File(args.get(i));
count += mconvert(src, new File(destDir, src2dest(src)));
}
return count;
}
private String src2dest(File src) {
String srcname = src.getName();
return src.isFile() ? srcname + this.fileExt : srcname;
}
public int mconvert(File src, File dest) throws IOException {
if (!src.exists()) {
System.err.println("WARNING: No such file or directory: " + src
+ " - skipped.");
return 0;
}
if (src.isFile()) {
try {
convert(src, dest);
} catch (Exception e) {
System.err.println("WARNING: Failed to convert " + src + ":");
e.printStackTrace(System.err);
System.out.print('F');
return 0;
}
System.out.print('.');
return 1;
}
File[] files = src.listFiles();
if (files.length > 0 && !dest.exists()) {
dest.mkdirs();
}
int count = 0;
for (int i = 0; i < files.length; ++i) {
count += mconvert(files[i], new File(dest, src2dest(files[i])));
}
return count;
}
@SuppressWarnings("unchecked")
public static void main(String args[]) throws Exception {
CommandLine cl = parse(args);
Dcm2Jpeg dcm2jpg = new Dcm2Jpeg();
if (cl.hasOption("f")) {
dcm2jpg.setFrameNumber(
parseInt(cl.getOptionValue("f"),
"illegal argument of option -f",
1, Integer.MAX_VALUE));
}
if (cl.hasOption("p")) {
dcm2jpg.setPresentationState(loadDicomObject(
new File(cl.getOptionValue("p"))));
}
if (cl.hasOption("pv2gray")) {
dcm2jpg.setPValue2Gray(loadPVal2Gray(
new File(cl.getOptionValue("pv2gray"))));
}
if (cl.hasOption("c")) {
dcm2jpg.setWindowCenter(
parseFloat(cl.getOptionValue("c"),
"illegal argument of option -c"));
}
if (cl.hasOption("w")) {
dcm2jpg.setWindowWidth(
parseFloat(cl.getOptionValue("w"),
"illegal argument of option -w"));
}
if (cl.hasOption("sigmoid")) {
dcm2jpg.setVoiLutFunction(DicomImageReadParam.SIGMOID);
}
dcm2jpg.setAutoWindowing(!cl.hasOption("noauto"));
if (cl.hasOption("jpgext")) {
dcm2jpg.setFileExt(cl.getOptionValue("jpgext"));
}
final List<String> argList = cl.getArgList();
int argc = argList.size();
File dest = new File(argList.get(argc-1));
long t1 = System.currentTimeMillis();
int count = 1;
if (dest.isDirectory()) {
count = dcm2jpg.mconvert(argList, 0, dest);
} else {
File src = new File(argList.get(0));
if (argc > 2 || src.isDirectory()) {
exit("dcm2jpg: when converting several files, "
+ "last argument must be a directory\n");
}
dcm2jpg.convert(src, dest);
}
long t2 = System.currentTimeMillis();
System.out.println("\nconverted " + count + " files in " + (t2 - t1)
/ 1000f + " s.");
}
private static DicomObject loadDicomObject(File file) {
DicomInputStream in = null;
try {
in = new DicomInputStream(file);
return in.readDicomObject();
} catch (IOException e) {
exit(e.getMessage());
throw new RuntimeException();
} finally {
CloseUtils.safeClose(in);
}
}
private static short[] loadPVal2Gray(File file) {
BufferedReader r = null;
try {
r = new BufferedReader(new InputStreamReader(new FileInputStream(
file)));
short[] pval2gray = new short[256];
int n = 0;
String line;
while ((line = r.readLine()) != null) {
try {
int val = Integer.parseInt(line.trim());
if (n == pval2gray.length) {
if (n == 0x10000) {
exit("Number of entries in " + file + " > 2^16");
}
short[] tmp = pval2gray;
pval2gray = new short[n << 1];
System.arraycopy(tmp, 0, pval2gray, 0, n);
}
pval2gray[n++] = (short) val;
} catch (NumberFormatException nfe) {
// ignore lines where Integer.parseInt fails
}
}
if (n != pval2gray.length) {
exit("Number of entries in " + file + ": " + n
+ " != 2^[8..16]");
}
return pval2gray;
} catch (IOException e) {
exit(e.getMessage());
throw new RuntimeException();
} finally {
CloseUtils.safeClose(r);
}
}
private static CommandLine parse(String[] args) {
Options opts = new Options();
OptionBuilder.withArgName("frame");
OptionBuilder.hasArg();
OptionBuilder.withDescription(
"frame to convert, 1 (= first frame) by default");
opts.addOption(OptionBuilder.create("f"));
OptionBuilder.withArgName("prfile");
OptionBuilder.hasArg();
OptionBuilder.withDescription(
"file path of presentation state to apply");
opts.addOption(OptionBuilder.create("p"));
OptionBuilder.withArgName("center");
OptionBuilder.hasArg();
OptionBuilder.withDescription("Window Center");
opts.addOption(OptionBuilder.create("c"));
OptionBuilder.withArgName("width");
OptionBuilder.hasArg();
OptionBuilder.withDescription("Window Width");
opts.addOption(OptionBuilder.create("w"));
opts.addOption("sigmoid", false,
"apply sigmoid VOI LUT function with given Window Center/Width");
opts.addOption("noauto", false,
"disable auto-windowing for images w/o VOI attributes");
OptionBuilder.withArgName("file");
OptionBuilder.hasArg();
OptionBuilder.withDescription(
"file path of P-Value to gray value map");
opts.addOption(OptionBuilder.create("pv2gray"));
OptionBuilder.withArgName(".xxx");
OptionBuilder.hasArg();
OptionBuilder.withDescription(
"jpeg file extension used with destination directory argument,"
+ " default: '.jpg'.");
opts.addOption(OptionBuilder.create("jpgext"));
opts.addOption("h", "help", false, "print this message");
opts.addOption("V", "version", false,
"print the version information and exit");
CommandLine cl = null;
try {
cl = new GnuParser().parse(opts, args);
} catch (ParseException e) {
exit("dcm2jpg: " + e.getMessage());
throw new RuntimeException("unreachable");
}
if (cl.hasOption('V')) {
Package p = Dcm2Jpeg.class.getPackage();
System.out.println("dcm2jpg v" + p.getImplementationVersion());
System.exit(0);
}
if (cl.hasOption('h') || cl.getArgList().size() < 2) {
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp(USAGE, DESCRIPTION, opts, EXAMPLE);
System.exit(0);
}
return cl;
}
private static int parseInt(String s, String errPrompt, int min, int max) {
try {
int i = Integer.parseInt(s);
if (i >= min && i <= max)
return i;
} catch (NumberFormatException e) {
// parameter is not a valid integer; fall through to exit
}
exit(errPrompt);
throw new RuntimeException();
}
private static float parseFloat(String s, String errPrompt) {
try {
return Float.parseFloat(s);
} catch (NumberFormatException e) {
exit(errPrompt);
throw new RuntimeException();
}
}
private static void exit(String msg) {
System.err.println(msg);
System.err.println("Try 'dcm2jpg -h' for more information.");
System.exit(1);
}
}
这是将jpg转换为pdf的源代码
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import javax.imageio.ImageIO;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;
import com.itextpdf.text.Document;
import com.itextpdf.text.Element;
import com.itextpdf.text.Image;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfWriter;
public class JPGToPDFConverter {
public static void main(String[] args) {
selectImage();
}
// allow images selection for converting
public static void selectImage() {
JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter("Images",
"jpg", "gif", "png", "bmp");
chooser.setFileFilter(filter);
chooser.setMultiSelectionEnabled(true);
int returnVal = chooser.showOpenDialog(null);
if (returnVal == JFileChooser.APPROVE_OPTION) {
File[] Files = chooser.getSelectedFiles();
System.out.println("Please wait...");
for (int i = 0; i < Files.length; i++) {
convertJPGToPDF(Files[i].toString(), "pdfimage" + i + ".pdf");
}
System.out.println("Conversion complete");
}
}
public static void convertJPGToPDF(String strimg, String desc) {
try {
// create document object
Document doc = new Document();
// create pdf writer object to write the document to the output file
PdfWriter.getInstance(doc, new FileOutputStream(desc));
// get a4 paper size
Rectangle r = PageSize.A4;
// read the image
BufferedImage orImg = ImageIO.read(new File(strimg));
// initialize image width and height
int width = orImg.getWidth();
int height = orImg.getHeight();
// resize the image that is bigger than A4 size
if (width > r.getWidth())
width = (int) r.getWidth();
if (height > r.getHeight())
height = (int) r.getHeight();
// create a blank buffered image
BufferedImage bi = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
// create graphic2d object from the buffered image
Graphics2D g2d = bi.createGraphics();
// draw the original image on the buffered image
// so the image is resized to fit the A4 paper size if it is bigger
// than A4 size
g2d.drawImage(orImg, 0, 0, width, height, null);
// store the image data in memory
ByteArrayOutputStream bas = new ByteArrayOutputStream();
ImageIO.write(bi, "png", bas);
// create image from the image data stored in memory
Image img = Image.getInstance(bas.toByteArray());
// centrally align the image on the pdf page
img.setAlignment(Element.ALIGN_CENTER);
// open document
doc.open();
// add image to the document
doc.add(img);
// close the document
doc.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
用于jpg转换为pdf转换代码，您需要下载this jar file iTextPDF
答案 2 :(得分：0)
使用dcm4che（the updated re-written one）和itext库将dicom文件的页面转换为pdf的简化解决方案。
public void convert(InputStream inStream, OutputStream outStream, String fileName) throws Exception {
Iterator<ImageReader> iter = ImageIO.getImageReadersByFormatName("DICOM");
ImageReader reader = iter.next();
reader.setInput(inStream);
Document document = new Document();
Rectangle pageSize = PageSize.LETTER;
document.setPageSize(pageSize);
document.setMargins(0f, 0f, 0f, 0f);
PdfWriter writer = PdfWriter.getInstance(document, outStream);
document.open();
int pageNum = 0;
boolean finished = false;
while (!finished) {
try {
// read each dicom page as an image
BufferedImage bi = reader.read(pageNum);
if (bi == null) {
throw new RuntimeException("Couldn't read " + fileName);
}
PdfContentByte pdfCB = new PdfContentByte(writer);
Image image = Image.getInstance(pdfCB, bi, 1);
// scale the image down to fit on the page width-wise
if (image.getWidth() > pageSize.getWidth() || image.getHeight() > pageSize.getHeight()) {
image.scaleToFit(pageSize);
}
// align to the middle horizontally
image.setAlignment(Element.ALIGN_CENTER);
document.add(image);
} catch (IndexOutOfBoundsException ioobe) {
finished = true;
}
pageNum += 1;
}
document.close();
}