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devel / comp.protocols.dicom / Re: Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO 2022 IR 87

Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO 2022 IR 87

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Subject: Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO 2022 IR 87
From: sylvgrol@gmail.com (Sylvain Grolleau)
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by: Sylvain Grolleau - Thu, 11 May 2023 15:09 UTC

Hi,

I'm using dcmtk toolikit 3.6.7 built against libiconv. So
ISO 2022 IR 13\ISO 2022 IR 87 shall be supported by dcmtk.
However, and according to dcmtk source, it seems that dcmtk doesn't support extended character set (here ISO 2022 IR 87) as destination encoding.

// normalize the given string (original VR is "CS" with VM "1-n", but we only support VM "1")

Are you planing to provide this really nice feature in a close future?

Regards

Re: Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO 2022 IR 87

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Subject: Re: Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO
2022 IR 87
From: dicom@jriesmeier.com (Jörg Riesmeier)
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by: Jörg Riesmeier - Fri, 12 May 2023 07:39 UTC

Hi Sylvain,

> I'm using dcmtk toolikit 3.6.7 built against libiconv. So
> ISO 2022 IR 13\ISO 2022 IR 87 shall be supported by dcmtk.
> However, and according to dcmtk source, it seems that dcmtk doesn't support extended character set (here ISO 2022 IR 87) as destination encoding.

this limitation is clearly documented in the DcmSpecificCharacterSet [1] class:

* @note Please note that a current limitation is that only a single value is
* allowed for the destination character set (i.e. no code extensions). Of
* course, for the source character set, also multiple values are supported.

[1] https://support.dcmtk.org/docs/classDcmSpecificCharacterSet.html#details

> Are you planing to provide this really nice feature in a close future?

There are no plans to implement this in the near future. A blog posting [2] describes "how new features are added to the DCMTK". Here [3,4] is some more background information on the character set support in the DCMTK.

[2] https://blog.jriesmeier.com/2013/03/how-are-new-features-added-to-the-dcmtk/
[3] https://blog.jriesmeier.com/2011/11/enhanced-character-set-support/
[4] https://blog.jriesmeier.com/2013/04/character-sets-revisited/

By the way, the latest development version of the DCMTK [5] comes with a built-in character set conversion library (oficonv) that is based on work of the Citrus project. This enhancement will also be part of the upcoming DCMTK 3.6.8.

[5] http://git.dcmtk.org/

Regards,
Jörg

Subject	Author
Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO 2022 IR 87	Sylvain Grolleau
Re: Unable to convert a dataset from ISO IR 192 into ISO IR 6\ISO	Jörg Riesmeier