本文主要是介绍DICOM DCM4CHE影像压缩,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
随着医疗影像的发展,影像设备拍摄的图像越来越大,越来越多,但医疗影像的存储成本是很高的(云存储就更不用说了),所以在存储的时候会先将医疗影像压缩,之后再存储,以节省存储成本,所以着手研究DCM压缩和解压…
- 什么是传输语义
在进行无损压缩的主题之前,先说一下什么是传输语义吧!毕竟是否进行压缩最直接的观察点就在传输语义;
点击了解传出语义
主要知道 **1.2.840.10008.1.2.4.70(JPEGLossless)和1.2.840.10008.1.2.4.90(JPEG2000LosslessOnly)**是无损压缩就好
- 直接上代码
所需maven如下:
<!--dcm4che--><dependency><groupId>org.dcm4che</groupId><artifactId>dcm4che-core</artifactId><version>5.16.1</version></dependency><dependency><groupId>org.dcm4che</groupId><artifactId>dcm4che-image</artifactId><version>5.16.1</version></dependency><dependency><groupId>org.dcm4che</groupId><artifactId>dcm4che-imageio</artifactId><version>5.16.1</version></dependency><dependency><groupId>org.dcm4che</groupId><artifactId>dcm4che-imageio-opencv</artifactId><version>5.16.1</version></dependency><dependency><groupId>org.weasis.opencv</groupId><artifactId>weasis-opencv-core</artifactId><version>3.0.4</version></dependency>
代码如下:
package com.mpx.util;import org.dcm4che3.data.Attributes;
import org.dcm4che3.util.Property;
import org.dcm4che3.imageio.codec.Transcoder;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.List;public class Dcm2Dcm2 {private static List<Property> params = new ArrayList<Property>();public static void main(String[] args) {File src = new File("F:\Desktop\2238\DX\src.DCM"); //带有压缩协议的dicom原始文件File dest = new File("F:\Desktop\2238\DX\des1.2.840.10008.1.2.4.90.DCM"); //压缩成无损压缩的dicom目标文件try {transcodeWithTranscoder(src, dest);} catch (IOException e) {e.printStackTrace();}}public static void transcodeWithTranscoder(File src, final File dest) throws IOException {try (Transcoder transcoder = new Transcoder(src)) {transcoder.setIncludeFileMetaInformation(true);transcoder.setDestinationTransferSyntax("1.2.840.10008.1.2.4.90");Property p = new Property("compressionQuality", 0.5);//压缩率params.add(p);transcoder.setCompressParams(params.toArray(new Property[params.size()]));transcoder.transcode(new Transcoder.Handler() {@Overridepublic OutputStream newOutputStream(Transcoder transcoder, Attributes dataset) throws IOException {return new FileOutputStream(dest);}});} catch (Exception e) {Files.deleteIfExists(dest.toPath());throw e;}}}
看一下压缩的效果
其实上面有一行代码 引起了我的注意
Property p = new Property("compressionQuality", 0.5);//压缩率
难道我可以控制压缩的率的大小?
随后我修改成
Property p = new Property("compressionQuality", 0.1);//压缩率
想着可以压缩的更小一点
结果呢~一样
后面果断尝试把这段注释了
Property p = new Property("compressionQuality", 0.5);//压缩率params.add(p);transcoder.setCompressParams(params.toArray(new Property[params.size()]));
结果奇迹出现了 2927kb 成了819kb
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