commons-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Stephen Nesbitt <>
Subject Re: [Sanselan] - Help Parsing EXIF Info embedded in PNG
Date Wed, 03 Mar 2010 20:22:00 GMT
Hi Chris:

I honestly don't think so. First of all if I use exiftool on one of my PNG I 
do get a dump of EXIF info. And this corresponds to the documentation for 
exiftool ( 
which indicates that embedding EXIF is indeed not a PNG standard *but* 
embedding arbitrary tag names is allowable and that one of the arbitrary but 
standard tag names is "Raw profile type exif" and that it contains "raw" EXIF 

So I think the key questions is how do I parse the data and in particular is 
the data returned by the zTxt.getText() method is compressed or uncompressed.


On Wednesday 03 March 2010 11:25:12 am Christopher Schultz wrote:
> Stephen,
> On 3/3/2010 1:38 PM, Stephen Nesbitt wrote:
> > I am trying to figure out how to parse EXIF info embedded in a PNG.
> I'm no PNG/EXIF expert, but Wikipedia's EXIF page says that PNG doesn't
> support EXIF:
> "
> The specification uses the existing JPEG, TIFF Rev. 6.0, and RIFF WAV
> file formats, with the addition of specific metadata tags. It is not
> supported in JPEG 2000, PNG, or GIF.
> "
> (
> Maybe that's the problem?
> -chris
> ---------------------------------------------------------------------
> To unsubscribe, e-mail:
> For additional commands, e-mail:

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message