[postgis-devel] Postgis Raster JPEG 2000 (openjpeg)

[Bborie Park]

The general advice for stashing images in the database is: Don't. They
recommend storing outside the database.

-bborie


On Thu, Feb 20, 2014 at 5:56 AM, Rémi Cura <remi.cura at gmail.com> wrote:

> Good,
> maybe the postgres list would have some advice about the classical problem
> of dealing with images in base ?
>
> Cheers,
> Rémi-C
>
>
> 2014-02-20 14:45 GMT+01:00 Nathaniel Clay <clay.nathaniel at gmail.com>:
>
> Remi,
>>
>> JPEG 2000 offers several formats, one being JP2C or code stream. This
>> format breaks down the file (intended for streaming across the wire)
>> internally into tiles with markers then inside the tile markers packets
>> containing the data for the specified tile. My initial thought is to store
>> each of the tile packet streams in a row that is indexed in a table with in
>> row separation of the packets for each of the resolutions (this appears to
>> be able to be done with out an decode or encode for reassembly). Thus Union
>> and simple Clip (with out trimming) operations would be copy and modify the
>> header information operation back into a valid JP2C code stream to be sent
>> directly to the client or consuming function/application for decode. JPEG
>> 2000 is a large specification with many subparts, I am in the process of
>> preparing two emails one to the list answering Bories' questions (more
>> general and format neutral) , and another with more specifics of my idea
>> for JPEG 2000, internal database format storage.  I am taking the time to
>> confirm the specifics as related to the JPEG 2000 specification and
>> postgresql.
>>
>> Thanks,
>>
>> Nathaniel Hunter Clay
>>
>
>
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