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Graphics::ColorDeficiency.3pm

NAME

Graphics::ColorDeficiency - Color Deficiency Simulation

SYNOPSIS

   use Graphics::ColorDeficiency;
 
   my $col = Graphics::ColorDeficiency->newRGB(0.5, 0.7, 1);
 
   my $col2 = $col->asProtanopia;
 
   print $col2->asHex;
 
 

DESCRIPTION

This module allows easy transformation of colors for color deficiency simulation. All the known and theorhetical color deficiencies are represented here, with the exception of 4-cone vision (tetrachromatism).

Each of the transformation methods returns a "Graphics::ColorObject" object, with the internal color values set. This can then be used to return the color in many different formats (see the "Graphics::ColorObject" manpage).

METHODS

"asProtanopia()"

"asDeutanopia()"

"asTritanopia()"

The three dichromat methods return a "Graphics::ColorObject" object, simulated for the three dichromatic vision modes.

"asProtanomaly( $amount )"

"asDeuteranomaly( $amount )"

"asTritanomaly( $amount )"

The three anomalous trichromat methods return a "Graphics::ColorObject" object, simulated for the three anomalous trichromatic vision modes. The optional $amount agrument allows you to specify the severity of anomaly, ranging from 0 (trichromatic) to 1 (dichromatic). If not specified, it defaults to 0.5.

"asTypicalMonochrome()"

Returns a "Graphics::ColorObject" object in Typical Monochromatic (Rod Monochromat) mode.

"asAtypicalMonochrome( $amount )"

Returns a "Graphics::ColorObject" object in Atypical Monochromatic (Cone Monochromat) mode. The amount specified in $amount can vary between 1 (trichromatic) and 0 (monochromatic). The default is 0.2 (four fifths gray).

"Clone()"

Clones the current object, returning a "Graphics::ColorDeficiency" object with the same color values as the current object.

"asMix( $color, $amount )"

Returns a new "Graphics::ColorDeficiency", consisting of the current color values, mixed with the values of the $color object. $amount specifies the amount of the new color to mix in, from 0 (which is equal to "$self.Clone()"), up to 1 (which is equal to "$color.Clone()"). The mix is a linear RGB interpolation.

This method is used internally.

AUTHOR

Copyright (C) 2003 Cal Henderson <cal@iamcal.com>

SEE ALSO

Graphics::ColorObject

<http://www.iamcal.com/toys/colors/>