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<---Start of the CSVFILE ----------------------------->
<--Here goes a image --------------------------------->
...
123456    123     john     9393939    data     data
123456    123     john     9393939    data     data
123456    123     john     9393939    data     data

<--Here goes a image --------------------------------->

while (<>) {
    if (m/^<--Here goes a image.../) {
...
        print;
    }
}

while (<>) {
    if ($. == 2) {
...
        print;
    }
}