Search found 1493 matches

by Marco Eichelberg
Tue, 2024-10-29, 18:53
Forum: DCMTK - General
Topic: Error while converting Video to DCM
Replies: 10
Views: 1858

Re: Error while converting Video to DCM

You cannot directly convert JPEG to JPEG-LS. These are two entirely different file formats (despite the similar name). If you want to generate a JPEG-LS encoded DICOM file from a JPEG file, you must use class Image2Dcm to convert the JPEG file to a DICOM file in JPEG Baseline transfer syntax decompr...
by Marco Eichelberg
Thu, 2024-10-24, 12:45
Forum: DCMTK - General
Topic: vs2022: unresolved external symbol "public: __cdecl I2DJpegSource::I2DJpegSource(void)
Replies: 1
Views: 349

Re: vs2022: unresolved external symbol "public: __cdecl I2DJpegSource::I2DJpegSource(void)

The symbol is definitely defined in "i2d.lib". Perhaps there is a problem with the order in which libraries are linked?
by Marco Eichelberg
Fri, 2024-10-18, 16:39
Forum: DCMTK - Installation
Topic: DCMTK 3.6.8 Debug storescp fail
Replies: 4
Views: 770

Re: DCMTK 3.6.8 Debug storescp fail

Ah, that is another error. I tracked this in DCMTK issue #1141 and fixed it right away (the fix is, of course, trivial).
The commit should be visible in the public git in a few days.
by Marco Eichelberg
Thu, 2024-10-17, 12:31
Forum: DCMTK - General
Topic: Error while converting Video to DCM
Replies: 10
Views: 1858

Re: Error while converting Video to DCM

I see two possibilities: During association negotiation, the server does not accept a presentation context for the compressed transfer syntax. In this case, the SCU will decompress the object before transmitting it The image is transmitted in compressed form, but the server does some local processin...
by Marco Eichelberg
Thu, 2024-10-17, 12:14
Forum: DCMTK - Installation
Topic: DCMTK 3.6.8 Debug storescp fail
Replies: 4
Views: 770

Re: DCMTK 3.6.8 Debug storescp fail

Thank you for the bug report. This bug has been reported before and has been fixed with commit #169030f5a in May 2024, which is publicly available via our Git server or the Github mirror.
by Marco Eichelberg
Wed, 2024-10-16, 09:43
Forum: DCMTK - General
Topic: Error while converting Video to DCM
Replies: 10
Views: 1858

Re: Error while converting Video to DCM

Please describe your problem more precisely. Who is sending what where? Furthermore, are you certain that the delay is caused by your application, or could this be a problem on the "other side"?
by Marco Eichelberg
Tue, 2024-10-15, 09:02
Forum: DCMTK - General
Topic: Unable to load 12-bit image from DICOM files
Replies: 4
Views: 348

Re: Unable to load 12-bit image from DICOM files

For your information, I have created an issue in our issue tracker: https://support.dcmtk.org/redmine/issues/1140
by Marco Eichelberg
Tue, 2024-10-15, 08:54
Forum: DCMTK - General
Topic: Unable to load 12-bit image from DICOM files
Replies: 4
Views: 348

Re: Unable to load 12-bit image from DICOM files

There are several problems here: The JPEG decoder will decode a 12-bit JPEG bitstream into an image with BitsAllocated=16. However, the getUncompressedFrameSize() method does not know this and returns a calculation based on BitsAllocated=12. BitsAllocated=12 is not permitted in DICOM. This value mus...
by Marco Eichelberg
Thu, 2024-10-10, 09:39
Forum: DCMTK - General
Topic: Setting sagittal orientation for DICOM Dataset
Replies: 1
Views: 361

Re: Setting sagittal orientation for DICOM Dataset

You are generating DICOM files using either the Multi-frame Grayscale Byte SC Image Storage or the Multi-frame True Color SC Image Storage SOP Class. Neither of these SOP classes support the Image Plane Module, where the (0020,0037) Image Orientation (Patient) attribute is defined. In brief, you are...
by Marco Eichelberg
Thu, 2024-09-12, 08:54
Forum: DCMTK - General
Topic: Nan and Infinity
Replies: 4
Views: 1159

Re: Nan and Infinity

You mean, we should declare some methods in class DcmJsonFormat virtual that are currently not declared so? That would certainly be possible. Perhaps you could propose a patch.
by Marco Eichelberg
Sat, 2024-09-07, 20:56
Forum: DCMTK - General
Topic: Nan and Infinity
Replies: 4
Views: 1159

Re: Nan and Infinity

Unfortunately, JSON does not have official keywords for "not a number" and "infinity". DICOM will define official keywords in CP 2275, which is not public yet. These will probably be the same ones as supported by JavaScript, but in any case DCMTK will write JSON compatible with C...
by Marco Eichelberg
Sun, 2024-09-01, 16:09
Forum: DCMTK - General
Topic: Applying Rescale slope and Rescale intercept and Modality LUT Sequence
Replies: 1
Views: 1481

Re: Applying Rescale slope and Rescale intercept and Modality LUT Sequence

Question 1: Yes, you have to apply Rescale Slope and Intercept to every pixel. However, this transformation, called the "Modality LUT Transformation" in DICOM (even if there is not real look-up table), is not intended to convert pixels to output values. See the DICOM pixel transformation ...
by Marco Eichelberg
Mon, 2024-08-26, 15:50
Forum: DCMTK - General
Topic: Error while converting Video to DCM
Replies: 10
Views: 1858

Re: Error while converting Video to DCM

I don't know how to pad a bitstream to even size for MPEG data. JPEG uses a marker format where the last two bytes of the bitstream are normally FF D9. However, the marker can also be written as FF FF D9, and this is used to pad a JPEG bitstream to even length. MPEG4 in DICOM is not a tag, but a tr...
by Marco Eichelberg
Mon, 2024-08-26, 15:41
Forum: DCMTK - General
Topic: Exception While Decompress the JPEG-LS Dicom file
Replies: 4
Views: 1929

Re: Exception While Decompress the JPEG-LS Dicom file

I cannot see anything obviously wrong in your code. If the code works with DCMTK 3.6.8 but crashes with 3.6.4, then a bug fix in DCMTK is probably the cause of the difference in behavior. If you cannot migrate to DCMTK 3.6.8, then you will have to check each commit that affected the dcmjpls module t...
by Marco Eichelberg
Tue, 2024-08-13, 16:40
Forum: DCMTK - General
Topic: Error while converting Video to DCM
Replies: 10
Views: 1858

Re: Error while converting Video to DCM

Unfortunately, DCMTK functions often return EC_IllegalCall whenever the developer of the class was too lazy to produce a more meaningful error message. So this could be all kind of things. The most probable reason is that your temp file has an odd number of bytes (i.e. length & 1 != 0 ). In DICO...