1

该死的我很沮丧...

按照此页面http://support.dcmtk.org/docs/mod_dcmjpeg.html中的示例,我编写了一个 C++ 程序来解压缩 JPEG 压缩的 DICOM 图像文件

现在我想反之亦然,从未压缩到压缩,如果我在同一页面中使用另一个示例,使用相同(或其他文件)代码编译并运行但无法压缩文件......

我看到在下面的代码之后,原来的Xfer和Current是一样的,这不好,因为需要不同

dataset->chooseRepresentation(EXS_JPEGProcess14SV1, &params);

这就像chooseRepresentation方法失败....

更多线路

dataset->canWriteXfer(EXS_JPEGProcess14SV1)

返回假

我在 dcpixel.cc 文件中看到了,调试代码进入

DcmPixelData::canChooseRepresentation(......... 
.... 
.... 
// representation not found, check if we have a codec that can create the 
// desired representation. 
if (original == repListEnd) 
   { 
     result = DcmCodecList::canChangeCoding(EXS_LittleEndianExplicit, toType.getXfer()); 
    } 

结果是假的....

我该如何解决?有人有一个代码可以用 DCMTK 或其他库压缩 DICOM 图像

这是完整的代码:

int main()
{

    //dcxfer.h
    DJDecoderRegistration::registerCodecs(); // register JPEG codecs
    DcmFileFormat fileformat;

    /**** MONO FILE ******/


    if (fileformat.loadFile("Files/cnv3DSlice (1)_cnv.dcm").good())
    {
        DcmDataset *dataset = fileformat.getDataset();
        DcmItem *metaInfo = fileformat.getMetaInfo();
        DJ_RPLossless params; // codec parameters, we use the defaults


        // this causes the lossless JPEG version of the dataset to be created
        dataset->chooseRepresentation(EXS_JPEGProcess14SV1, &params);

        // check if everything went well
        if (dataset->canWriteXfer(EXS_JPEGProcess14SV1))
        {
            // force the meta-header UIDs to be re-generated when storing the file
            // since the UIDs in the data set may have changed
            delete metaInfo->remove(DCM_MediaStorageSOPClassUID);
            delete metaInfo->remove(DCM_MediaStorageSOPInstanceUID);

            // store in lossless JPEG format
            fileformat.saveFile("Files/test_jpeg_compresso.dcm", EXS_JPEGProcess14SV1);
        }
    }

    DJDecoderRegistration::cleanup(); // deregister JPEG codecs

    return 0;
}
4

1 回答 1

3

尝试压缩图像时,您需要调用

DJEncoderRegistration::registerCodecs();

解压是

DJDecoderRegistration::registerCodecs(); 
于 2015-01-22T12:03:19.617 回答