HarmonyOS image组件如何设置colorFilter让图片本身从白色变为黑色？

.colorFilter([0,0,0,0,0,  
0,0,0,0,0,  
0,0,0,0,0,  
0.2,0.2,0.2,0.2,0.2,])

[ r_1,r_2,r_3,r_4,r_5,  
  g_1，g_2，g_3，g_4，g_5,  
  b_1,b_2,b_3,b_4,b_5,  
  a_1,a_2,a_3,a_4,a_5]

[R’, G’, B’, A’]：  
R’= r_1R+ r_2G+ r_3B+ r_4A+ r_5  
G’ = g_1R + g_2G + g_3B+g_4A+g_5  
B’= b_1R + b_2G + b_3B +b_4A + b_5  
A’ = a_1R + a_2G+ a_3B +a_4A+a_5

@Entry  
@Component  
struct Index {  
  build() {  
    Column() {  
      Row() {  
        Image($r('app.media.example'))  
          .width('40%')  
          .margin(10)  
        Image($r('app.media.example'))  
          .width('40%')  
          .colorFilter(  
            [1, 1, 0, 0, 0,  
             0, 1, 0, 0, 0,  
             0, 0, 1, 0, 0,  
             0, 0, 0, 1, 0])  
          .margin(10)  
      }.width('100%')  
      .justifyContent(FlexAlign.Center)  
    }  
  }  
}