IrfanView versus XnView for PNG files

IrfanView versus XnView for PNG files


IrfanView
http://www.irfanview.com/
doesn't appear to be able to show emmbed text information in PNG files;
however, XnView
http://www.xnview.com/
does.

The following webpage has a PNG picture of an owl on it with the following
embedded text information (IE6 doesn't seem to be able to show this PNG
image, where as Mozilla Firebird can, so if you are an IE user you might
have to right click and save the png file first)

http://www.libpng.org/pub/png/png-OwlAlpha.html

Embedded text is:

Title: Horned Owl
Author: Pieter S. van der Meulen
Description: The original image was taken in July '90 with a Canon A-1
and FD35-70 on Ektachrome, 100 ASA, on July 1990 in Alaska.
The photographer (me is reflected in the eyes (@left),
and is being completely ignored by this magnificent bird.
Digitization was done via PhotoCD. From 4Base resolution,
the alpha channel was created by edge detection and floodfill.
Low-pass filtering (norm. cut-off 0.2) was applied to create
a soft alpha mask. The final result was shrunk by half.
URL: http://www.geocities.com/Yosemite/71...onalparks.html for the
original PhotoCD image;
http://www.cdrom.com/pub/png/ for the PNG home site.
Copyright: Copyright 1999 Pieter S. van der Meulen. This image, including
the alpha channel, may be used, edited and reproduced freely.
Software: pnmtopng 2.37.2

Does anyone know of any software that can display the above information
(select properties from XnView for the above) or that can actually edit this
information?

I haven't been able to find any freeware that can edit PNG text or tag
information. I don't know why this is as you would think it is easy to code
and very useful.

Rili

"Rili" <> wrote:

>IrfanView versus XnView for PNG files

>IrfanView
>http://www.irfanview.com/
>doesn't appear to be able to show emmbed text information in PNG files;
>however, XnView
>http://www.xnview.com/
>does.
>
>The following webpage has a PNG picture of an owl on it with the following
>embedded text information (IE6 doesn't seem to be able to show this PNG
>image, where as Mozilla Firebird can, so if you are an IE user you might
>have to right click and save the png file first)
>
>http://www.libpng.org/pub/png/png-OwlAlpha.html

Rili,

why don't you write this to the author of IrfanView? He's quite
approachable and may enhance his program to include PNG text
tags like this.

By the way, Internet Explorer 6 indeed doesn't display the
picture, but left-clicking on it opens the full-scale picture,
and that is displayed quite well in IE.

Hans-Georg

--
No mail, please.

Hans-Georg Michna

Paintshop Pro (v7) will allow the editing of the information.

Yours,

Sam

"Rili" <> wrote in message
news:3f99c682$0$21651$ u...
> IrfanView versus XnView for PNG files
>
>
> IrfanView
> http://www.irfanview.com/
> doesn't appear to be able to show emmbed text information in PNG files;
> however, XnView
> http://www.xnview.com/
> does.
>
> The following webpage has a PNG picture of an owl on it with the following
> embedded text information (IE6 doesn't seem to be able to show this PNG
> image, where as Mozilla Firebird can, so if you are an IE user you might
> have to right click and save the png file first)
>
> http://www.libpng.org/pub/png/png-OwlAlpha.html
>
> Embedded text is:
>
> Title: Horned Owl
> Author: Pieter S. van der Meulen
> Description: The original image was taken in July '90 with a Canon A-1
> and FD35-70 on Ektachrome, 100 ASA, on July 1990 in Alaska.
> The photographer (me is reflected in the eyes (@left),
> and is being completely ignored by this magnificent bird.
> Digitization was done via PhotoCD. From 4Base resolution,
> the alpha channel was created by edge detection and floodfill.
> Low-pass filtering (norm. cut-off 0.2) was applied to create
> a soft alpha mask. The final result was shrunk by half.
> URL: http://www.geocities.com/Yosemite/71...onalparks.html for the
> original PhotoCD image;
> http://www.cdrom.com/pub/png/ for the PNG home site.
> Copyright: Copyright 1999 Pieter S. van der Meulen. This image, including
> the alpha channel, may be used, edited and reproduced freely.
> Software: pnmtopng 2.37.2
>
> Does anyone know of any software that can display the above information
> (select properties from XnView for the above) or that can actually edit
this
> information?
>
> I haven't been able to find any freeware that can edit PNG text or tag
> information. I don't know why this is as you would think it is easy to
code
> and very useful.
>
>

Martin Spiers

Thanks for the info.

I've finally found a freeware one that does it.

TweakPNG from <http://entropymine.com/jason/tweakpng/>

Now I just need to find a viewer that can show the appropriate fields while
looking at the picture.


"Martin Spiers" <> wrote in message
news:07rmb.2650$...
> Paintshop Pro (v7) will allow the editing of the information.
>
> Yours,
>
> Sam
>
> "Rili" <> wrote in message
> news:3f99c682$0$21651$ u...
> > IrfanView versus XnView for PNG files
> >
> >
> > IrfanView
> > http://www.irfanview.com/
> > doesn't appear to be able to show emmbed text information in PNG files;
> > however, XnView
> > http://www.xnview.com/
> > does.
> >
> > The following webpage has a PNG picture of an owl on it with the
following
> > embedded text information (IE6 doesn't seem to be able to show this PNG
> > image, where as Mozilla Firebird can, so if you are an IE user you might
> > have to right click and save the png file first)
> >
> > http://www.libpng.org/pub/png/png-OwlAlpha.html
> >
> > Embedded text is:
> >
> > Title: Horned Owl
> > Author: Pieter S. van der Meulen
> > Description: The original image was taken in July '90 with a Canon A-1
> > and FD35-70 on Ektachrome, 100 ASA, on July 1990 in Alaska.
> > The photographer (me is reflected in the eyes (@left),
> > and is being completely ignored by this magnificent bird.
> > Digitization was done via PhotoCD. From 4Base resolution,
> > the alpha channel was created by edge detection and floodfill.
> > Low-pass filtering (norm. cut-off 0.2) was applied to create
> > a soft alpha mask. The final result was shrunk by half.
> > URL: http://www.geocities.com/Yosemite/71...onalparks.html for the
> > original PhotoCD image;
> > http://www.cdrom.com/pub/png/ for the PNG home site.
> > Copyright: Copyright 1999 Pieter S. van der Meulen. This image,
including
> > the alpha channel, may be used, edited and reproduced freely.
> > Software: pnmtopng 2.37.2
> >
> > Does anyone know of any software that can display the above information
> > (select properties from XnView for the above) or that can actually edit
> this
> > information?
> >
> > I haven't been able to find any freeware that can edit PNG text or tag
> > information. I don't know why this is as you would think it is easy to
> code
> > and very useful.
> >
> >
>
>

Rili