use strict;

my @files = glob "D:/pics/tiff/*.tif";
for (@files){
    my $images = imagecounter($_);
    printf "%40s : %3d \n", $_, $images;
}


sub imagecounter{
    my $tiff = shift;
    my @endian;
    my $offset = 0;
    my $index;
    my $count = 0;

    open (my $fh, "<", $tiff);
    binmode $fh;
    seek ($fh, $offset, 0);
    read ($fh, $endian[0], 2);

    $endian[0] = unpack "a2", $endian[0];
    if ($endian[0] eq 'II'){
        $endian[1] = 'v';
        $endian[2] = 'V';
    }elsif ($endian[0] eq 'MM'){
        $endian[1] = 'n';
        $endian[2] = 'N';
    }else{
        warn "Unknown byte order in $tiff, possible bad file\n";
        return 0;
    }

    seek ($fh, 4, 0);
    read ($fh, $offset, 4);
    $offset = unpack "$endian[2]", $offset;

    while ($offset){
        $count++;
        my $length;
        seek ($fh, $offset, 0);
        read ($fh, $length, 2);
        $length = unpack "$endian[1]", $length;
        $index = ($length * 12);
        seek ($fh, $index, 1);
        read ($fh, $offset, 4);
        $offset = unpack "$endian[2]", $offset;
        if ($count > 100){
            warn "Count too high in $tiff, possible bad file\n";
            return 0;
        } 
    }
    close $fh;
    return $count;
}