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Enlarging an image by pixel replication |
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The following Java method takes a BufferedImage object and returns its enlarged
version. The parameter n specifies the enlargement factor.
To enlarge an image by an integer factor n, we will replicate pixels such that
each pixel in the input image becomes an n x n block of identical pixels
in the output image.
public static BufferedImage enlarge(BufferedImage image, int n) {
int w = n * image.getWidth();
int h = n * image.getHeight();
BufferedImage enlargedImage =
new BufferedImage(w, h, image.getType());
for (int y=0; y < h; ++y)
for (int x=0; x < w; ++x)
enlargedImage.setRGB(x, y, image.getRGB(x/n, y/n));
return enlargedImage;
}
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