Fwd: PNG and JPEG-2000 writting mode

[Gilles Caulier-4]

Hi all,

I'm back from hollidays. Please see below my message sent to Exiv2
mailing list, and let's me hear your feedback.

Note : look my blog entry for details : http://www.digikam.org/drupal/node/361

Best

Gilles Caulier


---------- Forwarded message ----------
From: Gilles Caulier <[hidden email]>
Date: 2008/7/27
Subject: PNG and JPEG-2000 writting mode
To: [hidden email]


Hi all,

I'm just back from 2 weeks of hollidays near mediteranean sea. During
this time (between 2 beach sessions (:=))), i have implemented
following stuff in Exiv2 core :

- PNG writting mode (see commit #1537 :
http://dev.robotbattle.com/cmtinfo_svn.php?r=10&l=50&v=1537)
- JPEG 2000 writting mode : not yet finalized. Code under review by Andreas.

Please, let's me hear about PNG writting mode if you have problems or
if you want more informations about.

Best

Gilles Caulier
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Digikam-devel mailing list
[hidden email]
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[Gerhard Kulzer-3]

On Sunday 27 July 2008 12:19:08 Gilles Caulier wrote:

> Hi all,

>

> I'm back from hollidays. Please see below my message sent to Exiv2

> mailing list, and let's me hear your feedback.

>

> Note : look my blog entry for details :

> http://www.digikam.org/drupal/node/361

>

> Best

>

> Gilles Caulier

Oh Gilles, you are fantastic again, I've been waiting so long for png writing mode! Sometimes a little restriction in bandwidth makes one concentrate on more essential stuff.

Thanks very very much

Gerhard

>

> ---------- Forwarded message ----------

> From: Gilles Caulier <[hidden email]>

> Date: 2008/7/27

> Subject: PNG and JPEG-2000 writting mode

> To: [hidden email]

>

>

> Hi all,

>

> I'm just back from 2 weeks of hollidays near mediteranean sea. During

> this time (between 2 beach sessions (:=))), i have implemented

> following stuff in Exiv2 core :

>

> - PNG writting mode (see commit #1537 :

> http://dev.robotbattle.com/cmtinfo_svn.php?r=10&l=50&v=1537)

> - JPEG 2000 writting mode : not yet finalized. Code under review by

> Andreas.

>

> Please, let's me hear about PNG writting mode if you have problems or

> if you want more informations about.

>

> Best

>

> Gilles Caulier

> _______________________________________________

> Digikam-devel mailing list

> [hidden email]

> https://mail.kde.org/mailman/listinfo/digikam-devel

_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

2008/7/27 Gerhard Kulzer <[hidden email]>:

> On Sunday 27 July 2008 12:19:08 Gilles Caulier wrote:
>
>> Hi all,
>
>>
>
>> I'm back from hollidays. Please see below my message sent to Exiv2
>
>> mailing list, and let's me hear your feedback.
>
>>
>
>> Note : look my blog entry for details :
>
>> http://www.digikam.org/drupal/node/361
>
>>
>
>> Best
>
>>
>
>> Gilles Caulier
>
> Oh Gilles, you are fantastic again, I've been waiting so long for png
> writing mode! Sometimes a little restriction in bandwidth makes one
> concentrate on more essential stuff.
>
> Thanks very very much
>
> Gerhard
>

And now, JPEG2000 wrtting mode support is fully implemented with this commit :

http://dev.robotbattle.com/cmtinfo_svn.php?r=10&l=50&v=1548

Please let's me hear your feedback. thanks in advance.

Gilles Caulier

Nota: to resume, using Exiv2 0.18 with digiKam, you will be able to
read/writte these metadata on fly :

JPEG:        Comment:R/W     Exif : R/W      Iptc: R/W   Xmp:R/W
PNG:          Comment:R/W     Exif : R/W      Iptc: R/W   Xmp:R/W
TIFF/DNG:  Comment:None    Exif : R/W      Iptc: R/W   Xmp:R/W
JPEG2000: Comment:None    Exif : R/W      Iptc: R/W   Xmp:R/W

I remember you that PNG, TIFF, JPEG2000 support color management, 16
bits color depth and loss less image data compression. You can use
your prefered file format to store your converted RAW image data
_without_ lack your camera metadata !

Nota2: the next important stage for me to deal with Exiv2 code is to be able to:

- writte metadata to TIFF based RAW file format (as NEF or CR2 for ex.)
- writte metadata

Best

Gilles Caulier
_______________________________________________
Digikam-devel mailing list
[hidden email]
https://mail.kde.org/mailman/listinfo/digikam-devel

[Gilles Caulier-4]

2008/7/29 Gilles Caulier <[hidden email]>:

> 2008/7/27 Gerhard Kulzer <[hidden email]>:
>> On Sunday 27 July 2008 12:19:08 Gilles Caulier wrote:
>>
>>> Hi all,
>>
>>>
>>
>>> I'm back from hollidays. Please see below my message sent to Exiv2
>>
>>> mailing list, and let's me hear your feedback.
>>
>>>
>>
>>> Note : look my blog entry for details :
>>
>>> http://www.digikam.org/drupal/node/361
>>
>>>
>>
>>> Best
>>
>>>
>>
>>> Gilles Caulier
>>
>> Oh Gilles, you are fantastic again, I've been waiting so long for png
>> writing mode! Sometimes a little restriction in bandwidth makes one
>> concentrate on more essential stuff.
>>
>> Thanks very very much
>>
>> Gerhard
>>
>
> And now, JPEG2000 wrtting mode support is fully implemented with this commit :
>
> http://dev.robotbattle.com/cmtinfo_svn.php?r=10&l=50&v=1548
>
> Please let's me hear your feedback. thanks in advance.
>
> Gilles Caulier
>
> Nota: to resume, using Exiv2 0.18 with digiKam, you will be able to
> read/writte these metadata on fly :
>
> JPEG:        Comment:R/W     Exif : R/W      Iptc: R/W   Xmp:R/W
> PNG:          Comment:R/W     Exif : R/W      Iptc: R/W   Xmp:R/W
> TIFF/DNG:  Comment:None    Exif : R/W      Iptc: R/W   Xmp:R/W
> JPEG2000: Comment:None    Exif : R/W      Iptc: R/W   Xmp:R/W
>
> I remember you that PNG, TIFF, JPEG2000 support color management, 16
> bits color depth and loss less image data compression. You can use
> your prefered file format to store your converted RAW image data
> _without_ lack your camera metadata !
>
> Nota2: the next important stage for me to deal with Exiv2 code is to be able to:
>
> - writte metadata to TIFF based RAW file format (as NEF or CR2 for ex.)
> - writte metadata

I complete may mail here (:=))):

- writte metadata to PSD file (we need a dedicated PSD image loader in
digiKam core to support 16 bits color depth.
- support new Sony makernote based on Minolta parser.

Best

Gilles Caulier
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