[FFmpeg-devel] [PATCH] Add DICOM Support

[Shivam]

On 6/26/19 4:37 PM, Michael Niedermayer wrote:
> On Wed, Jun 26, 2019 at 09:54:56AM +0200, Paul B Mahol wrote:
>> On 6/26/19, Michael Niedermayer <michael at niedermayer.cc> wrote:
>>> On Tue, Jun 25, 2019 at 01:52:09PM +0530, Shivam wrote:
>>>> On 6/25/19 2:12 AM, Michael Niedermayer wrote:
>>>>> On Mon, Jun 24, 2019 at 09:18:13PM +0530, Shivam wrote:
>>>>>> Hi!
>>>>>>
>>>>>>      The code is to add DICOM Support. The patch is only for
>>>>>> uncompressed
>>>>>> dicom files using explicit value representation. I would extend it, once
>>>>>> i
>>>>>> clarify some doubts.     As dicom image files contain lots of metadata
>>>>>> about
>>>>>> the patient. So, should i display that data while demuxing or should i
>>>>>> ignore and only demux the image data ?. In the current patch, i have
>>>>>> made an
>>>>>> option "-metadata", which when used will print the data on the terminal
>>>>>> while demuxing.
>>>>> metadata should be exported to be usable by applications.
>>>>>
>>>>> For teh API design a one test is that it should be possible to have a
>>>>> dicom file as input and a format with similar features as output and not
>>>>> loose any significant data.
>>>>> Printing to the terminal cannot achieve that easily.
>>>> So, should i export it to a csv file ?
>>> does it fit into the metadata system we have ?
>>>
>> To clarify, you mean frame metadata system?
> data that is specific to a frame would belong in the frame metadata
> data that is specific to a stream would belong into that streams metadata
> data that is specific to the container would belong to its metadata
>
> iam not sure if multiple streams or frames can be in a single dicom
> "container" / file. If they can then it should be clear what goes where
> if not then all 3 options would from the point of view of dicom be the
> same. And in that case what is most convenient for interoperation with
> other formats should be picked. That is lets introduce the least amount
> of differences to how similar data is handled in other formats

Dicom files contain multiple frames, but number of streams is always one 
(video) like GIF,( I haven't done multiframe support yet i am working on 
it ), The data specific to image/frames/pixels can be fit in the three 
categories of our metadata system, but their is extradata in DICOM files 
like : patient_name, medical_device_name , medical_procedure_done, 
study_date....

i have downloaded many samples from internet, the average number of 
these extra tags in a file is ~80

so, should i skip this data while demuxing or to extract it from the 
file format and do something with it.

also a complete list of DICOM tags is here:

https://www.dicomlibrary.com/dicom/dicom-tags/

https://dicom.innolitics.com/ciods/


Thank You

Shivam Goyal


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