Help reading exif info

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  • iKER-
    #1

    Help reading exif info

    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/exif...ames/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 ProcessingSoftw are 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...y ep...raw files are over 10Mb....
    "Image.FromFile (DialogoAbrir.F ileName)"

    I hope someone can help me. thanx

    iKER-
    Tags: None
    • Patrice
      #2
      Re: Help reading exif info

      On 17 fév, 13:06, iKER- <ike...@gmail.c omwrote:
      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/exif...mes/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  ProcessingSoftw are             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...y ep...raw files are over 10Mb....
      "Image.FromFile (DialogoAbrir.F ileName)"
      >
      I hope someone can help me. thanx
      >
      iKER-
      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 ?)

      --
      Patrice

        Comment

        • kimiraikkonen
          #3
          Re: Help reading exif info

          On Feb 17, 7:28 pm, Patrice <patrice_scr... @hotmail.comwro te:
          On 17 fév, 13:06, iKER- <ike...@gmail.c omwrote:
          >
          >
          >
          >
          >
          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/exif...ames/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  ProcessingSoftw are             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...y ep...raw files are over 10Mb....
          "Image.FromFile (DialogoAbrir.F ileName)"
          >
          I hope someone can help me. thanx
          >
          iKER-
          >
          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 ?)
          >
          --
          Patrice- Hide quoted text -
          >
          - Show quoted text -
          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.

            Comment

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