GrayImage - number of columns in a row for(int i = 0 i<...

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/* * File: GrayImage.java * -------------------- * Creates grayscale version of an image. */ import acm.program.*; import acm.graphics.*; public class GrayImage extends GraphicsProgram { public void run() { GImage image = new GImage("Claire.JPG"); GImage grayImage = createGrayscaleImage(image); add(image, 0, 50); add(grayImage, 380, 50); } /* Creates a grayscale version of the original image */ private GImage createGrayscaleImage(GImage image) { // Gets copy of pixel array from image int[][] array = image.getPixelArray(); int height = array.length; // number of rows in grid
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Unformatted text preview: // number of columns in a row for (int i = 0; i < height; i++) { for (int j = 0; j < width; j++) { int pixel = array[i][j]; int r = GImage.getRed(pixel); int g = GImage.getGreen(pixel); int b = GImage.getBlue(pixel); int xx = computeLuminosity(r, g, b); array[i][j] = GImage.createRGBPixel(xx, xx, xx); } } return new GImage(array); } /* Calculates the luminosity of a pixel using NTSC formula */ private int computeLuminosity(int r, int g, int b) { return GMath.round((0.299 * r) + (0.587 * g) + (0.114 * b)); } }...
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