Search found 38 matches

by wollet88
Wed, 2013-06-12, 11:10
Forum: DCMTK - General
Topic: Slowness sending from StoreSCU.exe to a PACS
Replies: 1
Views: 2384

Slowness sending from StoreSCU.exe to a PACS

Hi, we noticed a strange slowness sending from StoreSCU.exe to a PACS. After some tests we discovered this behavior depended from MAX PDU SIZE set on the PACS (it was 512KB). In addition the transfer rate from modality managing big PDU SIZE (512KB) to the same PACS was very fast. By reducing PACS PD...
by wollet88
Wed, 2012-08-22, 10:21
Forum: DCMTK - General
Topic: Issue in conversion of Enhanced MR to JPEG lossy
Replies: 4
Views: 5571

Re: Issue in conversion of Enhanced MR to JPEG lossy

Hi Jorg, first of all, thanks for your prompt feedback. A couple of comments: 1 - I am not using the DicomImage class explicitly, I am just doing Tx Syntax conversion on the DICOM file and related dataset. My code looks more or less like this: DcmFileFormat dcmFileFormat; if (dcmFileFormat.loadFile(...
by wollet88
Tue, 2012-08-21, 19:06
Forum: DCMTK - General
Topic: Issue in conversion of Enhanced MR to JPEG lossy
Replies: 4
Views: 5571

Re: Issue in conversion of Enhanced MR to JPEG lossy

Should it be useful for some testing, here is a link to a sample Enhanced MR DICOM file which shows issues once converted to Lossy JPEG Tx Syntax through DCMTK:

https://www.dropbox.com/s/sppwkjqz5tpkgi4/ENH_MR.dcm

Thanks in advance for any feedback on this topic.
Best regards,

Marco
by wollet88
Tue, 2012-08-21, 16:38
Forum: DCMTK - General
Topic: Issue in conversion of Enhanced MR to JPEG lossy
Replies: 4
Views: 5571

Issue in conversion of Enhanced MR to JPEG lossy

Hi all. I am experiencing an issue while trying to convert an Enhanced MR DICOM image file to JPEG lossy (1.2.840.10008.1.2.4.50) Transfer Syntax. The original uncompressed DICOM image file (Enhanced MR) has the following features: * Transfer Syntax UID = 1.2.840.10008.1.2.1 * Bits Allocated = 16 * ...
by wollet88
Wed, 2012-05-02, 08:43
Forum: DCMTK - General
Topic: Crash in Tx Syntax conversion from native to JPEG-LS
Replies: 10
Views: 10447

Hi Joerg, here is the DICOM file causing the issue: http://67.225.240.233/demo/00000000.crash.anon.zip If it may be useful, here is a ZIP archive containing the "raw" pixel data of the image causing that assertion on CharLS: http://67.225.240.233/demo/00000000.crash.raw.zip Thank you and best regards
by wollet88
Thu, 2012-04-26, 10:27
Forum: DCMTK - General
Topic: Crash in Tx Syntax conversion from native to JPEG-LS
Replies: 10
Views: 10447

Hi Joerg, we are in contact with Jan de Vaan (CharLS author). This is his answer regarding this issue: Hi, I have used the current build to encode the image you provided. This worked --- although after I masked away the unused 6 high bits from each pixel. (charls assumes (not checks) that the unused...
by wollet88
Tue, 2012-04-24, 18:23
Forum: DCMTK - General
Topic: Crash in Tx Syntax conversion from native to JPEG-LS
Replies: 10
Views: 10447

Hi Jorg, actually I was compiling in Release mode, but for some reason the Release mode in my VS 2010 solution did not define the NDEBUG symbol. My VS 2010 solution was generated by CMake on the DCMTK 3.6.0 package. I tried rebuilding with NDEBUG symbol defined: the assert() went away, and the Tx Sy...
by wollet88
Tue, 2012-04-24, 17:18
Forum: DCMTK - General
Topic: Crash in Tx Syntax conversion from native to JPEG-LS
Replies: 10
Views: 10447

Hi. We tried using the command line utility dcmcjpls (compiled from DCMTK 3.6.0 source with Visual Studio 2010), and here is what we obtain: dcmcjpls.exe -d c:\Share\testCrashCOmpressJPEG-LS\DICOM\00000000.crash c:\Share\testCrashCOmpressJPEG-LS\DICOM\00000000.crash.jpls D: $dcmtk: dcmcjpls v3.6.0 2...
by wollet88
Mon, 2012-04-23, 18:18
Forum: DCMTK - General
Topic: Crash in Tx Syntax conversion from native to JPEG-LS
Replies: 10
Views: 10447

Crash in Tx Syntax conversion from native to JPEG-LS

Hi all. We are experiencing a strange issue with OFFIS DCMTK when doing a DICOM Transfer Syntax conversion of a native-encoded DICOM file to JPEG-LS. We have two different 10-bit grayscale DICOM images (CR images) which are part of the same study and which are apparently identical from the "features...
by wollet88
Fri, 2011-09-02, 16:04
Forum: DCMTK - General
Topic: Multi threaded file load crashes due to logging
Replies: 10
Views: 10512

I added the following code (as suggested): log4cplus::SharedAppenderPtr nullapp(new log4cplus::NullAppender()); /* make sure that only the null logger is used */ log4cplus::Logger log = log4cplus::Logger::getRoot(); log.removeAllAppenders(); log.addAppender(nullapp); BUT the crash is always present....
by wollet88
Fri, 2011-09-02, 14:58
Forum: DCMTK - General
Topic: Multi threaded file load crashes due to logging
Replies: 10
Views: 10512

Hi, we encountered the same crash. Since we have DCMJP2K library, how can we workaround the problem? If we use the commit you signaled we lost JP2K library and I think also this library need to be patched to be thread safe. How can we solve? We don't need logging functionality but we seen that disab...
by wollet88
Fri, 2011-07-08, 14:18
Forum: DCMJP2K
Topic: Conversion from JPEG2000 to JPEG-LS
Replies: 11
Views: 25737

The problem was the PixelRepresentation=1 (not codec) incompatible with JPEG-LS near lossless.
I tryed to convert from JPEG2000 to JPEG-LS lossless and it's working.
Also other conversion from JPEG to JPEG2000 and viceversa works.

Thank you
by wollet88
Fri, 2011-07-08, 12:19
Forum: DCMJP2K
Topic: Conversion from JPEG2000 to JPEG-LS
Replies: 11
Views: 25737

I add that the second chooseRep. compressing to JPEG-LS again return the following:

"Unsupported pixel representation for near-lossless JPEG-LS compression"
by wollet88
Fri, 2011-07-08, 12:16
Forum: DCMJP2K
Topic: Conversion from JPEG2000 to JPEG-LS
Replies: 11
Views: 25737

Yes all registered correctly. I'm able to compress/decompress from non-encapsulated to encapsulated and vice-versa. I'm looking for a workaround to convert from encapsulated to encapsulated by decompressing to EVRLE on the fly. Adding my previous piece of code I think the decompression in memory suc...
by wollet88
Fri, 2011-07-08, 11:59
Forum: DCMJP2K
Topic: Conversion from JPEG2000 to JPEG-LS
Replies: 11
Views: 25737

I use the following code: // Temporary decompress original file eTxSyntax = EXS_LittleEndianExplicit; pDataset->chooseRepresentation(eTxSyntax, NULL); if (!pDataset->canWriteXfer(eTxSyntax)) // Decompression failed? { return FALSE; } Debugging the application the pDataset tx syntax remains EXS_JPEG2...