PreQuiz 1 - Spring 2006
Below is the sunset method that we wrote in class last week:
/**
* Method to make a picture look sunset-like
*/
public void sunsetize()
{
// get the array of pixels from the current picture
Pixel[] pixels = this.getPixels();
// declare the variable that will refer to the current pixel
Pixel pixel = null;
// declare the index and initialize it to 0
int index = 0;
// loop through all the pixels
while (index < pixels.length)
{
// get the current pixel
pixel = pixels[index];
// decrease the green and blue by 20%
pixel.setGreen(
(int)
(pixel.getGreen()*0.8));
pixel.setBlue(
(int)
(pixel.getBlue()*0.8));
index++;
}
}
Recall that creating a grayscale version of a picture is done by setting the red, green, and blue all to the same value. A good value to use is the average of the red, green, and blue pixel values.
- Rewrite this method as a grayscale() method.
- And be sure to use a for loop in your solution.
Questions? Answers? Comments?
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