I am trying to extract multiple "image data" (images) from file - storage structure is as follows:

AZII*
.
.->e.g 20 bytes of data
.
AZII*
.
.
etc...

The following code extracts the data between AZII* and puts in to numbered files: 
open (FILE, '1.dat') || die "$!";

$num=0;

 while ($line=<FILE>) {

 $num++ if $line =~/AZII*/;
    if ($line=~/AZII*/ .. /AZII*/) { 

      open (DES, ">>out/$num.txt");

      print DES $line;
 }

     if ($num == "5"){ # process 5 files only
      last;
     }

       }

[download]

The problem that I came across is the structure of the image files (tiffs in this case) should be fixed formatted as any binary structure e.g:

header
image data

currently the above code extracts the data in the following way:
look for AZII* if found output the whole line in to the file which damages the the image:

file 1:
-header(AZII*)
-image data
file 2:
-last row of image data from file 1 + header file 2 (AZII*)
-image data

Basically it prints the whole row of the last AZII* match.
The last row - .* part before AZII* should be printed in to file 1 and AZII* alone should start the next file2.

------------------------------------------------
e.g ƒÿýGDÄÄ#>q0‡‘‘„#"x°ÂñÇÿÿÿÿ ñ½ÿÿ AZII*
---------------------------------------------------

Where: ƒÿýGDÄÄ#>q0‡‘‘„#"x°ÂñÇÿÿÿÿ should be the end of file 1
And: AZII* should start the next file

heww hope this makes sense - any suggestions on how can I approach this.

Thanks,

In reply to File Extraction - Cont... by karavay

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