Examples of javax.media.jai.WarpPolynomial

javax.media.jai.WarpPolynomial

A polynomial-based description of an image warp.

The mapping is defined by two bivariate polynomial functions X(x, y) and Y(x, y) that map destination (x, y) coordinates to source X and Y positions respectively

The functions X(x, y) and Y(x, y) have the form:

 SUM{i = 0 to n} {SUM{j = 0 to i}{a_ij*x^(i - j)*y^j}} where n is the degree os the polynomial

WarpAffine, WarpQuadratic, and WarpCubic are special cases of WarpPolynomial for n equal to 1, 2, and 3 respectively. WarpGeneralPolynomial provides a concrete implementation for polynomials of higher degree. @see WarpAffine @see WarpQuadratic @see WarpCubic @see WarpGeneralPolynomial

         * Checks Warp properties.
         */
        final Warp warp = transform.getWarp();
        assertTrue("Expected a polynomial warp but got " + Classes.getShortClassName(warp),
                   warp instanceof WarpPolynomial);
        final WarpPolynomial poly = (WarpPolynomial) warp;
        /*
         * Compares transformations to the expected points.
         */
        for (int i=0; i<sources.length; i++) {
            final String  message  = formula.message() + " Point #" + i;

        final int[] scalesX = {1,2,3,4,5,6,  2,7,3,1,8};
        final int[] scalesY = {1,2,3,4,5,6,  6,2,5,9,1};
        for (int i=0; i<scalesX.length; i++) {
            final int scaleX = scalesX[i];
            final int scaleY = scalesY[i];
            final WarpPolynomial warp = executeTest(new Formula() {
                public String message() {
                    return "WarpAffine[" + scaleX + ',' + scaleY + ']';
                }
                public void transform(final Point point) {
                    point.x *= scaleX;

        final int[] scalesX = {1,2,3,4,5,6,  2,7,3,1,8};
        final int[] scalesY = {1,2,3,4,5,6,  6,2,5,9,1};
        for (int i=0; i<scalesX.length; i++) {
            final int scaleX = scalesX[i];
            final int scaleY = scalesY[i];
            final WarpPolynomial warp = executeTest(new Formula() {
                public String message() {
                    return "WarpQuadratic[" + scaleX + ',' + scaleY + ']';
                }
                public void transform(final Point point) {
                    point.x *= scaleX*point.x;

Examples of javax.media.jai.WarpPolynomial

Related Classes of javax.media.jai.WarpPolynomial