Converts an RGB image to grayscale
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examples upgrade to ndarray 1.0 Jun 26, 2013
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lum.js fixed pick Aug 15, 2013
package.json 1.0.2 Apr 29, 2014


Converts an RGB image into a grayscale luminance image. This is built on the ndarray library.


//Load up a test image
var lena = require("lena")

//Convert to grayscale
var grayscale_lena = require("luminance")(lena)

//Write the resulting png to stdout
require("save-pixels")(grayscale_lena, "png").pipe(process.stdout)

Which creates the following image:


npm install luminance


var luminance = require("luminance")


Returns A gray scale version of img

luminance(result, img)

Returns A gray scale version of img, the result is stored in result

luminance(red, green, blue)

Returns A gray scale image with red, green and blue channels in the given ndarrays

luminance(result, red, green, blue)

Returns A luminance image of red/green/blue with result stored in result.


(c) 2013 Mikola Lysenko. MIT License