How to use

interp

method

in

boofcv.abst.distort.FDistort

/**
 * Sets interpolation to use nearest-neighbor
 */
public FDistort interpNN() {
  return interp(InterpolationType.NEAREST_NEIGHBOR);
}

/**
 * Specifies the input and output image and sets interpolation to BILINEAR, black image border, cache is off.
 */
public FDistort init(ImageBase input, ImageBase output) {
  this.input = input;
  this.output = output;
  inputType = input.getImageType();
  interp(InterpolationType.BILINEAR);
  border(0);
  cached = false;
  distorter = null;
  outputToInput = null;
  return this;
}

/**
 * Constructor which specifies the characteristics of the undistorted image
 *
 * @param width Width of undistorted image
 * @param height Height of undistorted image
 * @param imageType Type of undistorted image
 */
public RemovePerspectiveDistortion( int width , int height , ImageType<T> imageType ) {
  output = imageType.createImage(width,height);
  distort = new FDistort(imageType);
  distort.output(output);
  distort.interp(InterpolationType.BILINEAR).transform(homography);
  for (int i = 0; i < 4; i++) {
    associatedPairs.add( new AssociatedPair());
  }
  associatedPairs.get(0).p1.set(0,0);
  associatedPairs.get(1).p1.set(output.width-1,0);
  associatedPairs.get(2).p1.set(output.width-1,output.height-1);
  associatedPairs.get(3).p1.set(0,output.height-1);
}

/**
 * Constructor which specifies the characteristics of the undistorted image
 *
 * @param width Width of undistorted image
 * @param height Height of undistorted image
 * @param imageType Type of undistorted image
 */
public RemovePerspectiveDistortion( int width , int height , ImageType<T> imageType ) {
  this(width,height);
  output = imageType.createImage(width,height);
  distort = new FDistort(imageType);
  distort.output(output);
  distort.interp(InterpolationType.BILINEAR).transform(transform);
}

private void applyScaling() {
  scaledImage.reshape(panel.getWidth(), panel.getHeight());
  if( scaledImage.width <= 0 || scaledImage.height <= 0 ) {
    return;
  }
  if( latestImage.width != 0 && latestImage.height != 0 ) {
    new FDistort(latestImage, scaledImage).interp(interpType).border(BorderType.EXTENDED).scale().apply();
    BufferedImage out = ConvertBufferedImage.convertTo(scaledImage, null, true);
    panel.setImageUI(out);
    panel.repaint();
  }
}