@Test
  public void compareToWaveletTransformOps() {
    GrayS32 orig = new GrayS32(width, height);
    GImageMiscOps.fillUniform(orig, rand, 0, 20);
    GrayS32 origCopy = orig.clone();

    int N = 3;
    ImageDimension dimen = UtilWavelet.transformDimension(orig, N);

    GrayS32 found = new GrayS32(dimen.width, dimen.height);
    GrayS32 expected = new GrayS32(dimen.width, dimen.height);

    WaveletDescription<WlCoef_I32> desc =
        FactoryWaveletDaub.biorthogonal_I32(5, BorderType.REFLECT);

    GrayS32 storage = new GrayS32(dimen.width, dimen.height);
    WaveletTransformOps.transformN(desc, orig.clone(), expected, storage, N);

    WaveletTransformInt<GrayS32> alg = new WaveletTransformInt<>(desc, N, 0, 255, GrayS32.class);
    alg.transform(orig, found);

    // make sure the original input was not modified like it is in WaveletTransformOps
    BoofTesting.assertEquals(origCopy, orig, 0);
    // see if the two techniques produced the same results
    BoofTesting.assertEquals(expected, found, 0);

    // test inverse transform
    GrayS32 reconstructed = new GrayS32(width, height);
    alg.invert(found, reconstructed);
    BoofTesting.assertEquals(orig, reconstructed, 0);
    // make sure the input has not been modified
    BoofTesting.assertEquals(expected, found, 0);
  }
  /** See how well it processes an image which is not an GrayS32 */
  @Test
  public void checkOtherType() {
    GrayS32 orig = new GrayS32(width, height);
    GImageMiscOps.fillUniform(orig, rand, 0, 20);
    GrayU8 orig8 = ConvertImage.convert(orig, (GrayU8) null);

    int N = 3;
    ImageDimension dimen = UtilWavelet.transformDimension(orig, N);

    GrayS32 found = new GrayS32(dimen.width, dimen.height);
    GrayS32 expected = new GrayS32(dimen.width, dimen.height);

    WaveletDescription<WlCoef_I32> desc =
        FactoryWaveletDaub.biorthogonal_I32(5, BorderType.REFLECT);

    GrayS32 storage = new GrayS32(dimen.width, dimen.height);
    WaveletTransformOps.transformN(desc, orig.clone(), expected, storage, N);

    WaveletTransformInt<GrayU8> alg = new WaveletTransformInt<>(desc, N, 0, 255, GrayU8.class);
    alg.transform(orig8, found);

    // see if the two techniques produced the same results
    BoofTesting.assertEquals(expected, found, 0);

    // see if it can convert it back
    GrayU8 reconstructed = new GrayU8(width, height);
    alg.invert(found, reconstructed);
    BoofTesting.assertEquals(orig8, reconstructed, 0);
    // make sure the input has not been modified
    BoofTesting.assertEquals(expected, found, 0);
  }