Free hair color software for linux

Imager::Color is a Perl module with color handling for Imager.

SYNOPSIS

$color = Imager::Color->new($red, $green, $blue);
$color = Imager::Color->new($red, $green, $blue, $alpha);
$color = Imager::Color->new("#C0C0FF"); # html color specification

$color->set($red, $green, $blue);
$color->set($red, $green, $blue, $alpha);
$color->set("#C0C0FF"); # html color specification

($red, $green, $blue, $alpha) = $color->rgba();
@hsv = $color->hsv(); # not implemented but proposed

$color->info();

if ($color->equals(other=>$other_color)) {
...
}

This module handles creating color objects used by imager. The idea is that in the future this module will be able to handle colorspace calculations as well.

new

This creates a color object to pass to functions that need a color argument.

set

This changes an already defined color. Note that this does not affect any places where the color has been used previously.

rgba

This returns the rgba code of the color the object contains.

info

Calling info merely dumps the relevant colorcode to the log.

equals(other=>$other_color)
equals(other=>$other_color, ignore_alpha=>1)

Compares $self and color $other_color returning true if the color components are the same.

Compares all four channels unless ignore_alpha is set. If ignore_alpha is set only the first three channels are compared.

You can specify colors in several different ways, you can just supply simple values:
simple numeric parameters - if you supply 3 or 4 numeric arguments, you get a color made up of those RGB (and possibly A) components.

a six hex digit web color, either RRGGBB or #RRGGBB
an eight hex digit web color, either RRGGBBAA or #RRGGBBAA.
a 3 hex digit web color, #RGB - a value of F becomes 255.
a color name, from whichever of the gimp Named_Colors file or X rgb.txt is found first. The same as using the name keyword.

You can supply named parameters:

red, green and blue, optionally shortened to r, g and b. The color components in the range 0 to 255.

# all of the following are equivalent
my $c1 = Imager::Color->new(red=>100, blue=>255, green=>0);
my $c2 = Imager::Color->new(r=>100, b=>255, g=>0);
my $c3 = Imager::Color->new(r=>100, blue=>255, g=>0);
hue, saturation and value, optionally shortened to h, s and v, to specify a HSV color. 0 new(hue=>120, value=>1, saturation=>0.5);
web, which can specify a 6 or 3 hex digit web color, in any of the forms #RRGGBB, #RGB, RRGGBB or RGB.
my $c1 = Imager::Color->new(web=>#FFC0C0); # pale red
gray or grey which specifies a single channel, from 0 to 255.
# exactly the same
my $c1 = Imager::Color->new(gray=>128);
my $c1 = Imager::Color->new(grey=>128);
rgb which takes a 3 member arrayref, containing each of the red, green and blue values.
# the same
my $c1 = Imager::Color->new(rgb=>[255, 100, 0]);
my $c1 = Imager::Color->new(r=>255, g=>100, b=>0);
hsv which takes a 3 member arrayref, containting each of hue, saturation and value.
# the same
my $c1 = Imager::Color->new(hsv=>[120, 0.5, 1]);
my $c1 = Imager::Color->new(hue=>120, v=>1, s=>0.5);

gimp which specifies a color from a GIMP palette file. You can specify the filename of the palette file with the palette parameter, or let Imager::Color look in various places, typically "$HOME/gimp-1.x/palettes/Named_Colors" with and without the version number, and in /usr/share/gimp/palettes/. The palette file must have color names.

my $c1 = Imager::Color->new(gimp=>snow);
my $c1 = Imager::Color->new(gimp=>snow, palette=>testimg/test_gimp_pal);

xname which specifies a color from an X11 rgb.txt file. You can specify the filename of the rgb.txt file with the palette parameter, or let Imager::Color look in various places, typically /usr/lib/X11/rgb.txt.

my $c1 = Imager::Color->new(xname=>blue) # usually RGB(0, 0, 255)

builtin which specifies a color from the built-in color table in Imager::Color::Table. The colors in this module are the same as the default X11 rgb.txt file.

my $c1 = Imager::Color->new(builtin=>black) # always RGB(0, 0, 0)

name which specifies a name from either a GIMP palette, an X rgb.txt file or the built-in color table, whichever is found first.

channel0, channel1, etc, each of which specifies a single channel. These can be abbreviated to c0, c1 etc.

channels which takes an arrayref of the channel values.

Optionally you can add an alpha channel to a color with the alpha or a parameter.

These color specifications can be used for both constructing new colors with the new() method and modifying existing colors with the set() method.

colorname is both a plugin for The Gimp as well as a standalone tool that tries to assign a name to a color, using external color definitions and linear algebra.

For this it calculates the euclidean distance between the currently selected color and all predefined colors, either in the RGB or HSV color space.

This project is licensed under the GPLv3.

Usage:

Standalone

Just start colorname.py

Gimp plugin

Once installed you can find colorname in the GIMP under: ”< Toolbox >/Xtns/Colorname”

Color::Calc provides a module which implements simple calculations with RGB colors.
This can be used to create a full color scheme from a few colors.
There are three methods to use the calculation functions: You can create an object, import customised functions into your namespace, or you can access them as class methods.
The module accepts color values in the following formats:
- An arrayref pointing to an array with three elements in the range 0..255 corresponding to the red, green, and blue component.
- A list of three values in the range 0..255 corresponding to the red, green, and blue component where the first value does not have 3 or a multiple of 3 digits (e.g. (0128,128,128)).
- A string containing a hexadecimal RGB value like #RGB/#RRGGBB/#RRRGGGBBB/..., or RGB/RRGGBB/RRRGGGBBB/...
- A color name accepted by Graphics::ColorNames. The interpretation is controlled by the ColorScheme parameter.
- A Graphics::ColorObject reference.

JColorGrid is a data visualization tool. JColorGrid is a platform-independent Java application for transforming numerical or text data into color-grids.

A color-grid is a generalization of the popular heat map representation that displays information two-dimensionally with an associated color hue. Color-grid representations provide an excellent means of illustrating complex data sets and can be used to identify trends, clusters and extremes in a given data set.

JColorGrid has been designed for ease of use and general utility. Data is entered into JColorGrid from a spreadsheet file (.xls) or a tab-delimited text file. Titles, row and colomn headings, scale titles and data are specified in input file. JColorGrid will represent both numerical and text data. There is no limit on the number of columns and rows.

Configuring the output color-grid is done using the JColorGrid configuration menu. Display colors can be specified for the data range, as well as for data the requires special handling, called exceptions. Additionally, the gradiant of the color scale is specified in the configuration menu. JColorGrid has many flexible color options that users are encouraged to explore. JColorGrid will output to both JPEG and EPS allowing the user to further modify the color-grid output in a suitable graphics editor.

Color Label is a service menu for KDE based on Color Folder 0.3.4 by HessiJames.

HowTo:

Extract all files and

copy colorlabel into /usr/bin/...

perhaps you need to make it executable chmod 755 /usr/bin/colorlabel

copy colorlabel.desktop to /home/~/.kde/share/apps/konqueror/servicemenus/colorlabel.desktop

True Color Picker is a PHP class that can be used to present a palette to let the user pick colors.

It displays an image with all the tones for the user to pick by clicking in an image point with the desired tone similar to Photoshop.

It uses AJAX to update the picker boxes without reloading the page.

Color::Scheme is a module used to generate pleasant color schemes.

This module is a Perl implementation of Color Schemes 2, a color scheme generator. Start by visitng the Color Schemes 2 web site and playing with the colors.

When you want to generate those schemes on the fly, begin using this modoule. The descriptions herein dont make too much sense without actually seeing the colorful results.

Henceforth, paragraphs in quotes denote documentation copied from Color Schemes 2.

"Important note: This tool doesnt use the standard HSV or HSB model (the same HSV/HSB values ie. in Photoshop describe different colors!). The color wheel used here differs from the RGB spectre used on computer screens, its more in accordance with the classical color theory.

This is also why some colors (especially shades of blue) make less bright shades than the basic colors of the RGB-model. In plus, the RGB-model uses red-green-blue as primary colors, but the red-yellow-blue combination is used here.

This deformation also causes incompatibility in color conversions from RGB-values. Therefore, the RGB input (eg. the HTML hex values like #F854A9) is not exact, the conversion is rough and sometimes may produce slightly different color."