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POUsing a Flood Fill Algorith to create an Array
 

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  1. POUsing a Flood Fill Algorith to create an Array
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    <p>I'm using a flood fill algorithm to sort through an image. If it encounters the same color, I want it copy that pixel over into an identically sized array called filled. The array filled is then transformed back into an image and saved as a jpg. However, when I open the jpg, it appears entirely black. </p> <pre><code>public static void findFace(int[][] image) throws IOException { int height = image.length; int width = image[0].length; Color centerStart = new Color(image[width / 2][height / 2]); int[][] filled = new int[width][height]; floodFill(width / 2, height / 2, centerStart, image, filled); //construct the filled array as image. Show if the face was found. BufferedImage bufferImage2 = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); for (int y = 0; y &lt; height; y++) { for (int x = 0; x &lt; width; x++) { int Pixel = filled[x][y] &lt;&lt; 16 | filled[x][y] &lt;&lt; 8 | filled[x][y]; bufferImage2.setRGB(x, y, Pixel); } } //save filled array as image file File outputfile = new File("/home/lily/Pictures/APicaDay/saved.jpg"); ImageIO.write(bufferImage2, "jpg", outputfile); } public static int[][] floodFill(int x, int y, Color targetColor, int[][] image, int[][] filled) { if (image[x][y] != targetColor.getRGB()) { return filled; } filled[x][y] = image[x][y]; floodFill(x - 1, y, targetColor, image, filled); floodFill(x + 1, y, targetColor, image, filled); floodFill(x, y - 1, targetColor, image, filled); floodFill(x, y + 1, targetColor, image, filled); return filled; } </code></pre> <p>bonus question: I would like the flood fill to also accept colors that are similar, but not the exact same, since I'm dealing with a photograph.</p>
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    1. COThe bit shifting to create `Pixel` seems a little odd... It seems like you haven't made up your mind if you have 3 byte RGB or int RGB samples. It's also hard to know what `int[][] image` really is. Try posting a fully runnable, but stripped down version of your code.
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    2. COAlso, are you not covering the same pixel multiple times? The recursion seems a little out of control. You also need bounds checking.
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