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BoofCV is an open source Java library for real-time computer vision and robotics applications.
/*
* Copyright (c) 2011-2015, Peter Abeles. All Rights Reserved.
*
* This file is part of BoofCV (http://boofcv.org).
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package boofcv.alg.interpolate;
import boofcv.alg.interpolate.array.PolynomialNevilleFixed_F32;
import boofcv.core.image.border.ImageBorder;
import boofcv.struct.image.ImageSingleBand;
/**
*
* Polynomial interpolation using {@link PolynomialNevilleFixed_F32 Neville's} algorithm.
* First interpolation is performed along the horizontal axis, centered at the specified x-coordinate.
* Then a second pass is done along the vertical axis using the output from the first pass.
*
*
*
* The code is unoptimized and the algorithm is relatively expensive.
*
*
* @author Peter Abeles
*/
public abstract class PolynomialPixel implements InterpolatePixelS {
// for reading pixels outside the image border
protected ImageBorder border;
// the image that is being interpolated
protected T image;
protected int M;
// if even need to add one to initial coordinate to make sure
// the point interpolated is bounded inside the interpolation points
protected int offM;
// temporary arrays used in the interpolation
protected float horiz[];
protected float vert[];
// the minimum and maximum pixel intensity values allowed
protected float min;
protected float max;
protected PolynomialNevilleFixed_F32 interp1D;
public PolynomialPixel(int maxDegree, float min, float max) {
this.M = maxDegree;
this.min = min;
this.max = max;
horiz = new float[maxDegree];
vert = new float[maxDegree];
if( maxDegree % 2 == 0 ) {
offM = 1;
} else {
offM = 0;
}
interp1D = new PolynomialNevilleFixed_F32(maxDegree);
}
@Override
public void setBorder(ImageBorder border) {
this.border = border;
}
@Override
public void setImage(T image) {
if( border != null )
border.setImage(image);
this.image = image;
}
@Override
public T getImage() {
return image;
}
@Override
public boolean isInFastBounds(float x, float y) {
float x0 = x - M/2 + offM;
float x1 = x0 + M;
float y0 = y - M/2 + offM;
float y1 = y0 + M;
return (x0 >= 0 && y0 >= 0 && x1 <= image.width-1 && y1 <= image.height-1 );
}
@Override
public int getFastBorderX() {
return M;
}
@Override
public int getFastBorderY() {
return M;
}
@Override
public ImageBorder getBorder() {
return border;
}
}
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