[Elphel-support] jp4 compression software?

[Andrey Filippov]

There is also a small PHP demo linked from the LinuxDevices article (
http://www.linuxfordevices.com/c/a/Linux-For-Devices-Articles/Elphel-camera-under-the-hood-from-Verilog-to-PHP/)
-
http://community.elphel.com/jp4/jp4demo.php . It explains JP4 and there is
source code there too.

Andrey

On Tue, Nov 17, 2009 at 1:41 AM, Sebastian Pichelhofer <
sebastian.pichelhofer at gmail.com> wrote:

> JP4 rearranges same color pixels from the bayer pattern in 8x8 pixel blocks
> to reduce high image frequencies that a pure bayer pattern would have
> (better for JPEG compressor as JPEG basically reduces the most detailed
> information = highest image frequency first).
>
> I am afraid there is no other code than the FPGA that shows how to create
> JP4.
>
> Are you building a camera and want to compress the images in the camera?
>
> Regards Sebastian
>
> Jay Thompson wrote:
>
>> Hello,
>>
>> I've recently come across the Elphel project as I have been working on raw
>> digital imagery / video workflows. I have a sequence of raw frames from a
>> KAI-2093 that I would like to attempt to process with the Elphel's jp4 /
>> avisynth workflow as well as experiment with a number of 'on the fly'
>> demosaicers. I am wondering if there is a general implementation of the jp4
>> compressor? I have seen the FPGA code but I cannot do anything with it.
>>
>> Thank you,
>> jt
>>
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>>
>
>
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