jit.rgb2luma Convert RGB to monochrome (luminance) The jit.rgb2luma object converts a 4-plane char ARGB (alpha, red, green, blue) matrix into a 1-plane char monochrome matrix containing the luminosity of the original matrix using the equation L = (.299 * R value) + (.587 * G value) + (.114 * B value).	from the library : Jitter Format : External Environment : jitter commercial Max 4.x http://www.cycling74.com