Help reading exif info

  • Thread starter Thread starter iKER-
  • Start date Start date
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iKER-

Hi!
I´m working in a program witch need to read Exif data from my Sony
Alpha A100 raw (arw extension) pictures. I found a table with keys for
read it, but i can´t read. I tried something, but i can´t. I found
this "table":

Full table is there: http://owl.phy.queensu.ca/~phil/exiftool/TagNames/EXIF.html

****************
Tag ID Tag Name Writable Group Values / Notes
0x0001 InteropIndex string! InteropIFD 'R03' = R03 -
DCF option
file (Adobe RGB)

'R98' = R98 - DCF basic file (sRGB)

'THM' = THM - DCF thumbnail file
0x0002 InteropVersion undef! InteropIFD
0x000b ProcessingSoftware string IFD0 (used by ACD
Systems
Digital Imaging)
0x00fe SubfileType int32u! IFD0 0 = Full-
resolution
Image

1 = Reduced-resolution image

2 = Single page of multi-page image

3 = Single page of multi-page reduced-resolution

4 = Transparency mask

5 = Transparency mask of reduced-resolution

6 = Transparency mask of multi-page image

7 = Transparency mask of reduced-resolution
*******************

The most important is to read Date data from Exif info. If someone can
write an example how to read this data... thank you!

I´ll tried with this code but i´ve go an error "out of memory" in this
instruction...yep...raw files are over 10Mb....
"Image.FromFile(DialogoAbrir.FileName)"

I hope someone can help me. thanx

iKER-
 
Hi!
I´m working in a program witch need to read Exif data from my Sony
Alpha A100 raw (arw extension) pictures. I found a table with keys for
read it, but i can´t read. I tried something, but i can´t. I found
this "table":

Full table is there:http://owl.phy.queensu.ca/~phil/exiftool/TagNames/EXIF..html

****************
Tag ID  Tag Name         Writable       Group   Values /Notes
0x0001  InteropIndex    string!         InteropIFD      'R03' = R03 -
DCF option
file (Adobe RGB)

'R98' = R98 - DCF basic file (sRGB)

'THM' = THM - DCF thumbnail file
0x0002  InteropVersion  undef!        InteropIFD
0x000b  ProcessingSoftware             string   IFD0    (used by ACD
Systems
Digital Imaging)
0x00fe  SubfileType     int32u!         IFD0             0 = Full-
resolution
Image

1 = Reduced-resolution image

2 = Single page of multi-page image

3 = Single page of multi-page reduced-resolution

4 = Transparency mask

5 = Transparency mask of reduced-resolution

6 = Transparency mask of multi-page image

7 = Transparency mask of reduced-resolution
*******************

The most important is to read Date data from Exif info. If someone can
write an example how to read this data... thank you!

I´ll tried with this code but i´ve go an error "out of memory" in this
instruction...yep...raw files are over 10Mb....
"Image.FromFile(DialogoAbrir.FileName)"

I hope someone can help me. thanx

iKER-
Click to expand...

Try perhaps :
http://en.wikipedia.org/wiki/Exif (or tools from the site you found).
They should mention tools that would allow to read those info (either
to fit your need or just to find out what your own code should find).

For now you are loading this file as an image. I doubt this is
supported as it takes most usual formats such as jpg, bmp etc... It's
likely you'll have :
- to read the image file, basically each "tag" - a numerical value -
indicates what is the information that follows, it allows to change
more easily the file format than if all informations were at fixed
locations
- it's likely you'll have also to convert the image data itself to a
format suitable for showing the image

Depneding on what is your interest (to have the job done or to do it
by yourself) you may want to check third party tools (your hardware is
not able to export this in a suitable format ?)
 
Try perhaps :http://en.wikipedia.org/wiki/Exif(or tools from the site you found).
They should mention tools that would allow to read those info (either
to fit your need or just to find out what your own code should find).

For now you are loading this file as an image. I doubt this is
supported as it takes most usual formats such as jpg, bmp etc... It's
likely you'll have :
- to read the image file, basically each "tag" - a numerical value -
indicates what is the information that follows, it allows to change
more easily the file format than if all informations were at fixed
locations
- it's likely you'll have also to convert the image data itself to a
format suitable for showing the image

Depneding on what is your interest (to have the job done or to do it
by yourself) you may want to check third party tools (your hardware is
not able to export this in a suitable format ?)
Click to expand...

Have you looked at Codeproject?
http://www.codeproject.com/KB/graphics/EXIF_Info_in_NET_30.aspx
http://www.codeproject.com/KB/graphics/exifextractor.aspx

just Googled.
 
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