/** Checks to see if the two ways of specifying interpolation work */
@Test
public void scale_InterpTypeStyle() {
ImageFloat32 input = new ImageFloat32(width, height);
ImageFloat32 output = new ImageFloat32(width, height);
GImageMiscOps.fillUniform(input, rand, 0, 100);
DistortImageOps.scale(input, output, TypeInterpolate.BILINEAR);
InterpolatePixel<ImageFloat32> interp = FactoryInterpolation.bilinearPixel(input);
interp.setImage(input);
float scaleX = (float) input.width / (float) output.width;
float scaleY = (float) input.height / (float) output.height;
if (input.getTypeInfo().isInteger()) {
for (int i = 0; i < output.height; i++) {
for (int j = 0; j < output.width; j++) {
float val = interp.get(j * scaleX, i * scaleY);
assertEquals((int) val, output.get(j, i), 1e-4);
}
}
} else {
for (int i = 0; i < output.height; i++) {
for (int j = 0; j < output.width; j++) {
float val = interp.get(j * scaleX, i * scaleY);
assertEquals(val, output.get(j, i), 1e-4);
}
}
}
}
public void get(T img) {
InterpolatePixel<T> interp = wrap(img, 0, 100);
assertEquals(compute(img, 10, 10), interp.get(10, 10), 1e-5f);
assertEquals(compute(img, 10.1f, 10), interp.get(10.1f, 10), 1e-5f);
assertEquals(compute(img, 10, 10.6f), interp.get(10, 10.6f), 1e-5f);
assertEquals(compute(img, 10.8f, 10.6f), interp.get(10.8f, 10.6f), 1e-5f);
}
/** Sees if get throws an exception if it is out of bounds */
public void get_outside() {
T img = createImage(width, height);
InterpolatePixel<T> interp = wrap(img, 0, 100);
try {
interp.get(500, 10);
if (exceptionOutside) fail("Didn't throw an exception when accessing an outside pixel");
} catch (IllegalArgumentException e) {
}
}
/**
* Interpolates the whole image and sees if the values returned are within the specified bounds
*/
@Test
public void checkPixelValueBoundsHonored() {
T img = createImage(20, 30);
GImageMiscOps.fillUniform(img, rand, 0, 100);
InterpolatePixel<T> interp = wrap(img, 0, 100);
for (int y = 0; y < img.height; y++) {
for (int x = 0; x < img.width; x++) {
float v = interp.get(x, y);
assertTrue(v >= 0 && v <= 100);
}
}
}
/**
* Scans through the whole image and for each pixel which is "safe" it compares the safe value to
* the unsafe value.
*/
@Test
public void isInSafeBounds() {
T img = createImage(width, height);
GImageMiscOps.fillUniform(img, rand, 0, 100);
InterpolatePixel<T> interp = wrap(img, 0, 100);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (interp.isInSafeBounds(x, y)) {
float a = interp.get(x, y);
float b = interp.get_unsafe(x, y);
assertEquals(a, b, 1e-4);
}
}
}
}
public void get_unsafe(T img) {
InterpolatePixel<T> interp = wrap(img, 0, 100);
assertEquals(interp.get(10, 10), interp.get_unsafe(10, 10), 1e-6);
assertEquals(interp.get(10.1f, 10), interp.get_unsafe(10.1f, 10), 1e-6);
assertEquals(interp.get(10, 10.6f), interp.get_unsafe(10, 10.6f), 1e-6);
assertEquals(interp.get(10.8f, 10.6f), interp.get_unsafe(10.8f, 10.6f), 1e-6);
}
/** Try the same get at a few border points and see if anything blows up */
@Test
public void checkSafeGetAlongBorder() {
T img = createImage(width, height);
GImageMiscOps.fillUniform(img, rand, 0, 100);
InterpolatePixel<T> interp = wrap(img, 0, 100);
// will it blow up?
interp.get(0, 0);
interp.get(width / 2, 0);
interp.get(0, height / 2);
interp.get(width - 1, height - 1);
interp.get(width / 2, height - 1);
interp.get(width - 1, height / 2);
}
protected void compare(InterpolatePixel<T> interp, T img, float x, float y) {
assertEquals(compute(img, x, y), interp.get(x, y), 1e-5f);
}
@Test
public void getImage() {
T img = createImage(width, height);
InterpolatePixel<T> interp = wrap(img, 0, 100);
assertTrue(img == interp.getImage());
}
