I have a non standard image format from which I need to extract the metadata. I have a description of the file header where the md is located. I was wondering what would be the best and easiest way to pull the metadata out.

(I seem to recall a method of layout out a file/data map - sort of how COBOL works - but can't remember the details or proper name of such...or if it would even work for data extraction.)

Alternately, if there is a way to pull bytes of data out, that may work, as well (IE I want bytes 0 - 11, then I want bytes 12 - 14, etc).

I've been away from perl for a while, and I don't have a lot of experience working in the data extraction realm, so please keep that in mind.

Thank you for your time.

In reply to Extracting Image/File Metadata by JunkGuy

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.