Digital Image Processing,3rd ed. Gonzalez Woods www.ImageProcessingPlace.com Chapter 6 Color Image Processing First approach for specifying colors: The amounts of red,green and blue needed to form any particular color are called the tristimulus values and are denoted X,Y and Z, respectively. A color is then specified by its trichromatic coefficients,defined as 标自定义 确定 X= X+Y+Z 取清 Y y=X+Y+Z 颜色模式D郎RGB 红色B: 115 2 绿色(G: 33 经x+Y+2 蓝色（欧 225 新增 From these equations that x+y +z =1 透明度① 0% 当 1992-2008 R.C.Gonzalez R.E.WoodsDigital Image Processing, 3rd ed. www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods Gonzalez & Woods Chapter 6 Color Image Processing • First approach for specifying colors: • The amounts of red, green and blue needed to form any particular color are called the tristimulus values and are denoted X, Y and Z, respectively. • A color is then specified by its trichromatic coefficients, defined as x= 𝑋 𝑋+𝑌+𝑍 y= 𝑌 𝑋+𝑌+𝑍 z= 𝑍 𝑋+𝑌+𝑍 From these equations that x+𝑦 + 𝑧 = 1