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Re: UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax? Started by bcoleman at 06-26-2008 14:59. Topic has 3 replies. LEAD Support Fo... » Developer » DICOM/Medical I... » Re: UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax?

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06-26-2008, 14:59 bcoleman Joined on 02-14-2008 Posts 5 UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax? I'm still working on this program to change a DICOM file to a compressed version.  It's fairly simple: if (DicomDS.LoadDS(args[0], 0) == 0) {     if (DicomDS.ChangeTransferSyntax(UID_JPEG2000, QFactor, 0) == 0) {         if (DicomDS.SaveDS(args[1], 0) == 0) {             return 0;         } else {              return 2;         }     } else {         return 3;     } } else {     return 4; } This works, but the resulting DICOM file does't seem to load into standard DICOM viewers like MEDISP.  Figuring that it's possible that MEDISP won't handle JPEG2000, I changed the UID to UID_JPEG_BASELINE_1.  This resulted in a run-time error: C:\ADProj\Merlin\newapps\DicomCompress\bin\Release>DicomCompress.exe AAE017.UZ0 AAE017.UZ0.new 10 Unhandled Exception: System.Runtime.InteropServices.COMException (0x800A4E29): L EAD Error: Invalid parmameter passed.    at LTDICLib.ILEADDicomDS.ChangeTransferSyntax(String bstrUID, Int16 nQFactor,  Int16 nFlags)    at DicomCompress.Program.Main(String[] args) I get the same thing with UID_JPEG_EXTENDED_2_4.  Both of these are documented as being valid for ChangeTransferSyntax.  I pulled the constant values from the UID.cs file in the examples, and visually checked them against the documentation, so I don't think the problem is having the constant wrong. I'm also wondering what could be causing the problem where the output file won't load into MEDISP.  I also tried creating the output with UID_RLE_LOSSLESS, and the resulting file won't load into MEDISP.  It's not like I'm fiddling with elements in the above code., so I'm puzzled why I should have this kind of problems with the output.    Report

06-26-2008, 15:35 jigar Joined on 08-22-2007 Posts 356 Re: UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax? I have a few questions to understand what is going on. 1. What is the value of UID_JPEG_BASELINE_1 and UID_JPEG_EXTENDED_2_4? 2. What is the value of QFactor? 3. What version of the toolkit do you have? Try passing ChangeTransferSyntaxFlag.None for the last parameter. LEADTOOLS Technical Support    Report

06-26-2008, 17:23 bcoleman Joined on 02-14-2008 Posts 5 Re: UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax?  jigar wrote: I have a few questions to understand what is going on. 1. What is the value of UID_JPEG_BASELINE_1 and UID_JPEG_EXTENDED_2_4? UID_JPEG_BASELINE_1 is "1.2.840.10008.1.2.4.50" UID_JPEG_EXTENDED_2_4 is "1.2.840.10008.1.2.4.51" Both of these are from the documentation and from the UID.cs file in the examples 2. What is the value of QFactor? QFactor is anywhere from 2 to 255.  I've been testing using 10. 3. What version of the toolkit do you have? Version 14.5 Try passing ChangeTransferSyntaxFlag.None for the last parameter. What library is that in?    Report

06-27-2008, 16:03 jigar Joined on 08-22-2007 Posts 356 Re: UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax? Ok, this is what I found out.  UID_JPEG_BASELINE_1 is for 8bit grayscale and 24bit color images only.  UID_JPEG_EXTENDED_2_4 is for 12bit grayscale only.  If you have anything else, such as a 16bit image, the function will return invalid parameter.  According to the 2008 DICOM standard you can use some other compression from the table below.  You will probably want to contact your other software manufacturer on why it won't read JPEG2000 compressed DICOMs.  JPEG2000 has been a standard for quite a while.  Transfer syntax Value Supported bit depth and color formats UID_IMPLICIT_VR_LITTLE_ENDIAN 1.2.840.10008.1.2 All including palette color UID_EXPLICIT_VR_LITTLE_ENDIAN 1.2.840.10008.1.2.1 All including palette color UID_EXPLICIT_VR_BIG_ENDIAN 1.2.840.10008.1.2.2 All including palette color UID_JPEG_BASELINE_1 1.2.840.10008.1.2.4.50 8-bit grayscale and 24-bit color (lossy compression) UID_JPEG_EXTENDED_2_4 1.2.840.10008.1.2.4.51 12 bit grayscale only (lossy compression) UID_JPEG_LOSSLESS_NONHIER_14 1.2.840.10008.1.2.4.57 All (lossless compression) but not palette color UID_JPEG_LOSSLESS_NONHIER_14B 1.2.840.10008.1.2.4.70 All (lossless compression) but not palette color UID_JPEG2000_LOSSLESS_ONLY 1.2.840.10008.1.2.4.90 All (lossless compression) but not palette color UID_JPEG2000 1.2.840.10008.1.2.4.91 All (lossy compression) but not palette color UID_RLE_LOSSLESS 1.2.840.10008.1.2.5 All including palette color Deflated Explicit VR Little Endian 1.2.840.10008.1.2.1.99 Not supported by LEADTOOLS JPEG-LS Lossless Image Compression 1.2.840.10008.1.2.4.80 Not supported by LEADTOOLS JPEG-LS Lossy (Near-Lossless)Image Compression 1.2.840.10008.1.2.4.81 Not supported by LEADTOOLS JPEG 2000 Part 2 Multi-component Image Compression (Lossless Only) 1.2.840.10008.1.2.4.92 Not supported by LEADTOOLS JPEG 2000 Part 2 Multi-component Image Compression 1.2.840.10008.1.2.4.93 Not supported by LEADTOOLS JPIP Referenced 1.2.840.10008.1.2.4.94 Implementation Specific and supported using web service (i.e. WADO implementation) JPIP Referenced Deflate 1.2.840.10008.1.2.4.95 Not supported by LEADTOOLS MPEG2 Main Profile @ Main Level 1.2.840.10008.1.2.4.100 Supported for 24 bit color (not supported by change transfer syntax) LEADTOOLS Technical Support    Report

LEAD Support Fo... » Developer » DICOM/Medical I... » Re: UID_JPEG_BASELINE_1 not a valid parameter for ChangeTransferSyntax?

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