-- Randal L. Schwartz, Perl hacker

So Image::Magick can read the FIASCO format?

Apparently not (at least, not yet). As you know, that format is brand-spanking new off some guy's doctoral thesis. I don't imagine that it's well-known but it certainly caught my eye. List of Image::Magick supported formats // The link bastard provides is good for reading up on this potentially powerful (and, if nothing else, interesting) image format based on "fractal magic".


AgentM Systems nor Nasca Enterprises nor Bone::Easy nor Macperl is responsible for the comments made by AgentM. Remember, you can build any logical system with NOR.

You might want to look a little closer. GD::getPixel does what you want to do, I think. Combine it with GD::rgb to get the rgb color at that point, like so:

my $index = $myImage->getPixel(20,100);
my ($r,$g,$b) = $myImage->rgb($index);
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Hope this helps.

use Image::Magick;
my $IMimage = Image::Magick->new;
$IMimage->Read($filename); 
$readval=$IMimage->Get('pixel['.$xcount.','.$ycount.']');
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Hello,
thank you for posting that - its certainly saved me - I've been running all over looking for something just like that.

My problem happens to be that I need the graylevels, not the RGBA values.

Would you, or anyone else, happen to know exactly how to retrieve that value for each pixel in my .pgm image using Image:Magick? I'm using the code posted above to get the RGB values, but I can't do anything with them really... Pointers to more Image::Magick documentations are welcome as well.

Thanks,

~mina

As merlyn alluded to above, you need to add an RGB to luminance conversion. There is no one right way to do this, but the one used in American TV broadcasting is:

   Luma (gray value) = 0.299*Red + 0.587*Green + 0.114*Blue

Reference: Keith Jack, Video Demystified, 2nd Ed. (HighText Publications)

my $color = sprintf "%02x%02x%02x", $r, $g, $b;
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I did an image to table converter here (colored cells)
I believe there are a few other progs like this here, try the code vault.

Snowcrash seems to have built(or used) something similar to what you are doing, but i'm not sure where his code is.

If this is enough, I/O routines for it are available at Japhoto.pl!.

Cheers