GmagickPixel
PHP Manual

GmagickPixel::getcolorvalue

Gets the normalized value of the provided color channel

Description

public float GmagickPixel::getcolorvalue(int $color)

Retrieves the value of the color channel specified, as a floating-point number between 0 and 1.

Parameters

color

The channel to check, specified as one of the Gmagick channel constants.

Return Values

The value of the channel, as a normalized floating-point number, throwing GmagickPixelException on error.