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This script uses Image::Magick to generate pairs of images for each image in a directory tree. The names for the images are generated using the given directory name as a template. Text provided on the command line is used to overstrike each small image (but not the thumbnail) using translucent text.

use strict; use warnings; use Image::Magick; use File::Spec::Functions qw(splitpath); use File::Find; my $thumbX = 100; my $thumbY = 66; my $smallX = 443; my $smallY = 293; my $ratio = $smallX / $smallY; if (@ARGV == 0) { print "Prepares the graphics files from the folder passed on the c +ommand line\n". "for publication on a web site. The files are first renamed usin +g\n". "the folder name as the name of the first image. A thumbnail ima +ge is\n". "then generated with the suffix _sm. Finally a small image is ge +nerated\n". "and overprinted with text provided as the first item on the com +mand line.\n". "\n". "PrepPhotos <brand text> <folders list>\n". "\n". "The <brand text> must be quoted unless it is a single word.\n". "Only .jpg and .gif files are processed. Multiple folders may be + supplied.\n". "Folder names should not include punctuation. Folder names shoul +d contain\n". "as many trailing 0's as are to be used in the serial number. Fo +r example\n". "BAR000 would allow images BAR000 - BAR999 to be generated. Odd +things\n". "will happen if too few digits are allowed for. The images are n +umbered\n". "starting with the given sequence number.\n"; exit (1); } my $overText = shift; my $overL = Image::Magick->new(); my $overP = Image::Magick->new(); my $points = 50; $overL->Set (size=>"1x1"); $overL->ReadImage('xc:#808080'); # Nochange colour for Hardlight my ($x_ppem, $y_ppem, $ascender, $descender, $width, $height, $max_adv +ance) = $overL->QueryFontMetrics ( pointsize => $points, text => "$overText", '@C:/WINDOWS/Fonts/times.ttf', # Omit for default font ); $width *= 1.2; $overL->Resize (width => $width, height => $height); $overL->Annotate ( pointsize => $points, text => "$overText", gravity=>'center', stroke => '#C0C0C0', # Increase to make stroke more white fill => '#505050', # Decrease to make fill more black '@C:/WINDOWS/Fonts/times.ttf', # Omit for default font ); $height /= $width / $smallX; # Maintain font aspect ratio $overL->Resize (width=>$smallX, height=>$height); # Scale width to ima +ge size $overP = $overL->Clone (); $overP->Resize (width=>$smallY, height=>$height * $smallY / $smallX); my $imageNumber; for (@ARGV) { ($imageNumber) = $_ =~ /(\w+)$/; find (\&process, $_); } print "Finished\n"; sub process {# process each file my $filename = $File::Find::name; my ($ext) = $filename =~ /(\..*?)$/; return if $filename !~ /\.(?:jpg|gif)$/i; return if -d $filename; my ($drive, $dir, $file) = splitpath ($filename); print "\nProcessing: $filename -> $imageNumber$ext\n"; my $image = Image::Magick->new (); my $thumb = Image::Magick->new (); $image->ReadImage ($filename); $thumb = $image->Clone (); my ($height, $width) = $image->Get ('height', 'width'); my $portrait = $height > $width; my ($x, $y) = ! $portrait ? ($thumbX, $thumbY) : ($thumbY, $thumbX); my $scaleX = $x / $width; my $scaleY = $y / $height; my $scale = $scaleX < $scaleY ? $scaleX : $scaleY; $thumb->Resize (width=>$width * $scale+0.5, height=>$height * $scale ++0.5); $thumb->Write ("$drive$dir${imageNumber}_sm$ext"); ($x, $y) = ! $portrait ? ($smallX, $smallY) : ($smallY, $smallX); $scaleX = $x / $width; $scaleY = $y / $height; $scale = $scaleX < $scaleY ? $scaleX : $scaleY; $image->Resize (width=>$width * $scale+0.5, height=>$height * $scale ++0.5); $image->Composite ( compose=>'Hardlight', image=> $portrait ? $overP : $overL, gravity=>'center' ); $image->Write ("$drive${dir}${imageNumber}$ext"); ++$imageNumber; }

The code is somewhat Windows oriented. The font used by Annotate may need to be fixed and the file extension management (look for $ext) are likely to need attention on other platforms.


Perl is Huffman encoded by design.

In reply to Generate thumbnail and small overstruck images for web publication by GrandFather

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