how to extract data/information from a image?

Replies

• 

  PraveenKumar Purushothaman

  If you are working on PHP, you can use the exif_read_data function. It reads the EXIF headers from JPEG or TIFF. For eg:

  php
echo "test1.jpg:\n";
$exif = exif_read_data('tests/test1.jpg', 'IFD0');
echo $exif===false ? "No header data found.\n" : "Image contains headers\n";
 
$exif = exif_read_data('tests/test2.jpg', 0, true);
echo "test2.jpg:\n";
foreach ($exif as $key => $section) {
    foreach ($section as $name => $val) {
        echo "$key.$name: $val\n";
    }
}
?>

  The output will be:

  test1.jpg:
  No header data found.
  test2.jpg:
  FILE.FileName: test2.jpg
  FILE.FileDateTime: 1017666176
  FILE.FileSize: 1240
  FILE.FileType: 2
  FILE.SectionsFound: ANY_TAG, IFD0, THUMBNAIL, COMMENT
  COMPUTED.html: width="1" height="1"
  COMPUTED.Height: 1
  COMPUTED.Width: 1
  COMPUTED.IsColor: 1
  COMPUTED.ByteOrderMotorola: 1
  COMPUTED.UserComment: Exif test image.
  COMPUTED.UserCommentEncoding: ASCII
  COMPUTED.Copyright: Photo (c) M.Boerger, Edited by M.Boerger.
  COMPUTED.Copyright.Photographer: Photo (c) M.Boerger
  COMPUTED.Copyright.Editor: Edited by M.Boerger.
  IFD0.Copyright: Photo (c) M.Boerger
  IFD0.UserComment: ASCII
  THUMBNAIL.JPEGInterchangeFormat: 134
  THUMBNAIL.JPEGInterchangeFormatLength: 523
  COMMENT.0: Comment #1.
  COMMENT.1: Comment #2.
  COMMENT.2: Comment #3end
  THUMBNAIL.JPEGInterchangeFormat: 134
  THUMBNAIL.Thumbnail.Height: 1
  THUMBNAIL.Thumbnail.Height: 1

  Hope this helps! 😀
• 

  macjone

  junior_james

  hi, i am doing my final year project(signature recognition),i planted to use image acquisition to capture the signature, and i am new to matlab,after i VB.NET TWAIN: VB.NET Code to Create TWAIN Basic Image Acquisition Tool tool in matlab, how should i examine the image?i am taking the image in grays colour then i dont know what should i do next....

  Have you thought of using OCR to extract text from image? It works great.