Different size of PNG files

I found that the size of a PNG file generated from the same RAW file is *very* different when

a) the image editor is used -> 50+ MB

b) Tools -> RAW Image Converter is used -> about 12 MB

although compression rate is 9 in Setup -> Saving Images as well as in the Save As... dialog of the image editor. My setup under openSuSE 11.0 is

dcraw-1.404-7.1

digikam-0.9.4-14.3

digikamimageplugins-0.9.4-14.3

digikamimageplugins-superimpose-0.9.4-14.3

digikam-lang-0.9.4-14.3

kipi-plugins-0.1.5-13.1

libexiv2-2-0.16-29.1

libgphoto2-2.4.2-1.1

libjasper-1.900.1-98.1

libjpeg-6.2.0-852.1

libkdcraw3-0.1.4-11.1 (but dcraw 8.87)

libkde4-4.0.4-15.2

libkexiv2-3-0.1.7-10.1

libkipi0-0.1.6-5.1

libpng12-0-1.2.26-14.2

libqt4-4.4.0-12.4

libtiff3-3.8.2-108.2

and I use a Canon EOS 450D.

Thanks in advance for the help

Francisco, Spain

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

[Gilles Caulier-4]

2008/10/11 Francisco Lorés Ara <[hidden email]>

I found that the size of a PNG file generated from the same RAW file is *very* different when

a) the image editor is used -> 50+ MB

b) Tools -> RAW Image Converter is used -> about 12 MB

although compression rate is 9 in Setup -> Saving Images as well as in the Save As... dialog of the image editor.

If you use digiKam and kipi-plugins for KDE3, Raw converter plugin support only 8 bits color depth, else digiKam image editor 16 bits color depth

but 50 Mb is very large. which RAW camera formt you convert ? Can you send me a raw file sample to test here (by private mail)

Gilles Caulier

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

On Sunday 12 October 2008 08:26:04 Gilles Caulier wrote:

> 2008/10/11 Francisco Lorés Ara <[hidden email]>

>

> > I found that the size of a PNG file generated from the same RAW file is

> > *very* different when

> >

> > a) the image editor is used -> 50+ MB

> >

> > b) Tools -> RAW Image Converter is used -> about 12 MB

> >

> > although compression rate is 9 in Setup -> Saving Images as well as in

> > the Save As... dialog of the image editor.

>

> If you use digiKam and kipi-plugins for KDE3, Raw converter plugin support

> only 8 bits color depth, else digiKam image editor 16 bits color depth

>

O.K., you are right, I forgot this...

> but 50 Mb is very large. which RAW camera formt you convert ? Can you send

> me a raw file sample to test here (by private mail)

>

> Gilles Caulier

Maybe too big to send it by mail (Canon CR2 raw file, 12.2 megapixels, about 14 MB), but you can download it from

http://www.telefonica.net/web2/mankind/_mg_0759.cr2

Thank you very much

Francisco

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