How can an image file, preferably tiff, be read so that the color value of each pixel may be identified? The goal is to determine if a pixel in an image is black or white, so that a stream of ones and zeros may be created.
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#!/usr/bin/perl
use Image::Magick;
$im = new Image::Magick;
$im->Read("test.tif");
$x=20;$y=20;
($red, $green, $blue, $opacity) = split /,/, $im->Get("pixel[$x,$y]");
if($red==0 && $green==0 && $blue==0) {
print "Color is black\n";
} elsif($red==255 && $green==255 && $blue==255) {
print "Color is white\n";
} else {
print "Color is $red,$green,$blue\n";
}
#!/usr/bin/perl
use Image::Magick;
$im = new Image::Magick;
$im->Read("test.tif");
$x=20;$y=20;
($red, $green, $blue, $opacity) = split /,/, $im->Get("pixel[$x,$y]");
if($red==0 && $green==0 && $blue==0) {
print "Color is black\n";
} elsif($red==255 && $green==255 && $blue==255) {
print "Color is white\n";
} else {
print "Color is $red,$green,$blue\n";
}
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by: holliPosted on 2003-03-19 at 12:52:42ID: 8169562
take a look at CPAN http://www.cpan.org
especially
http://search.cpan.org/aut
http://search.cpan.org/aut