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我想使用DCMTK解壓縮DICOM文件(如本例中所示)http://support.dcmtk.org/docs/mod_dcmjpeg.html 但我的問題是我不想加載文件。從PixelData值(DCMTK)開始解壓縮JPEG DICOM圖像
我有一個數組裏面有壓縮的PixelData值。我嘗試過這種方式,但不起作用。
DJDecoderRegistration::registerCodecs();
DJEncoderRegistration::registerCodecs();
DcmFileFormat fileformat;
DJ_RPLossless param_lossless;
DcmDataset *pDataset = fileformat.getDataset();
pDataset->chooseRepresentation(EXS_JPEGProcess14SV1, ¶m_lossless);
BYTE* pBufferImg = (BYTE*)pArray->ImgDicom.GetAt(0); //here I have my PixelData
//I put it into my dataset
pDataset->putAndInsertUint8Array(DCM_PixelData, pBufferImg, pArray->NumByteImg);
//decompress
OFCondition status = pDataset->chooseRepresentation(EXS_LittleEndianExplicit, NULL); //status is OK
...
//add all the tags like Rows, Columuns, BitStored, etc
...
if (pDataset->canWriteXfer(EXS_LittleEndianExplicit))
{
fileformat.saveFile("test.dcm", EXS_LittleEndianExplicit);
}
DJDecoderRegistration::cleanup(); // deregister JPEG codecs
DJEncoderRegistration::cleanup();
被創建的文件test.dcm但我不能打開它(免費的DICOM Viewr軟件崩潰),並且尺寸等於壓縮文件,因此解碼過程不起作用...什麼是我的錯誤?
我也曾嘗試:
DcmElement * dummyElem;
pDataset->findAndGetElement(DCM_PixelData, dummyElem);
Uint32 frameSize;
dummyElem->getUncompressedFrameSize(pDataset, frameSize);
BYTE* buf = new BYTE[frameSize];
OFString decompressedColorModel;
Uint32 startFragment = 0;
dummyElem->getUncompressedFrame(pDataset, 0, startFragment, buf, frameSize, decompressedColorModel);
pDataset->putAndInsertUint8Array(DCM_PixelData, (const Uint8*)buf, frameSize);
pDataset->removeAllButCurrentRepresentations();
//check if everything went well
if (pDataset->canWriteXfer(EXS_LittleEndianExplicit))
{
fileformat.saveFile("test.dcm", EXS_LittleEndianExplicit);
}
的getUncompressedFrame
返回錯誤「字節太多要求」 如果使用frameSize - 1
框架尺寸,而不是我有錯誤「非法調用也許錯參數」 ......但爲什麼?!?
0xcd 0xcd 0xcd是在調試模式下的未初始化數據(對於VS,至少gcc使用0xcc)。見https://stackoverflow.com/questions/370195/when-and-why-will-an-os-initialise-memory-to-0xcd-0xdd-etc-on-malloc-free-new – sashoalm 2015-02-10 16:29:12
謝謝,現在我知道了這意味着PixelData是未初始化的...我需要了解爲什麼我有'非法呼叫'狀態 – GiordiX 2015-02-10 16:46:18
我不能幫助你做更多的事情。我建議你重寫你的問題,因爲你知道cdcd的含義,希望別人會來。 – sashoalm 2015-02-10 17:02:34