java更改图像颜色像素

Question

编写一个程序，将每个像素的颜色隔离到最亮的通道。 例如： • 亮红色将保持亮红色 • 黑色将保持黑色 • 带有蓝色调的近白色将仅是亮蓝色 对于“最亮通道”有平局的像素，您如何打破平局并不重要.

Answer 1

while ( aPic.hasNext() ) {
  p = aPic.next(); // set p to the next pixel
  r = p.getRed();
  g = p.getGreen();
  b = p.getBlue();
  
  int maxChannelValue = Math.max(r, g, b); // figure out the value of the brightest channel
  // maxChannelValue is an int that equals one (or more) of r, g, or b

  if (maxChannelValue == r) { // if red is the brightest channel
    p.setGreen(0);
    p.setBlue(0); // turn off the non red values
  } else if (maxChannelValue == g) { // same but for green
    p.setRed(0);
    p.setBlue(0);
  } else { // same but for blue
    p.setRed(0);
    p.setGreen(0);
  }
}