Function to up sample the image - Java 2D Graphics

Java examples for 2D Graphics:Image

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Description

Function to up sample the image

Demo Code



public class Main{
    /**//from ww  w  .j  a v a  2s.c o  m
     *
     * Function to upsample the image
     *
     **/
    public static void zoom_in(final float[] I, // input image
            float[] Iout, // output image
            int nx, // width of the original image
            int ny, // height of the original image
            int nxx, // width of the zoomed image
            int nyy // height of the zoomed image
    ) {
        // compute the zoom factor
        final float factorx = ((float) nxx / nx);
        final float factory = ((float) nyy / ny);

        // re-sample the image using bicubic interpolation
        for (int i1 = 0; i1 < nyy; i1++)
            for (int j1 = 0; j1 < nxx; j1++) {
                float i2 = (float) i1 / factory;
                float j2 = (float) j1 / factorx;

                float g = IpolBicubicInterpolation
                        .bicubic_interpolation_at(I, j2, i2, nx, ny, false);
                try {
                    Iout[i1 * nxx + j1] = g;
                } catch (RuntimeException e) {
                    System.out.println();
                }
            }
    }
}

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