boofcv.alg.interpolate.impl.ImplInterpolatePixelConvolution_F32 Maven / Gradle / Ivy
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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.impl;
import boofcv.alg.interpolate.InterpolatePixelS;
import boofcv.core.image.border.ImageBorder;
import boofcv.core.image.border.ImageBorder_F32;
import boofcv.struct.convolve.KernelContinuous1D_F32;
import boofcv.struct.image.ImageFloat32;
import boofcv.struct.image.ImageType;
/**
*
* Performs interpolation by convolving a continuous-discrete function across the image. Borders are handled by
* re-normalizing. It is assumed that the kernel will sum up to one. This is particularly
* important for the unsafe_get() function which does not re-normalize.
*
*
*
* DO NOT MODIFY: Generated by {@link GenerateImplInterpolatePixelConvolution}.
*
*
* @author Peter Abeles
*/
public class ImplInterpolatePixelConvolution_F32 implements InterpolatePixelS {
// used to read outside the image border
private ImageBorder_F32 border;
// kernel used to perform interpolation
private KernelContinuous1D_F32 kernel;
// input image
private ImageFloat32 image;
// minimum and maximum allowed pixel values
private float min,max;
public ImplInterpolatePixelConvolution_F32(KernelContinuous1D_F32 kernel , float min , float max ) {
this.kernel = kernel;
this.min = min;
this.max = max;
}
@Override
public void setBorder(ImageBorder border) {
this.border = (ImageBorder_F32)border;
}
@Override
public void setImage(ImageFloat32 image ) {
if( border != null )
border.setImage(image);
this.image = image;
}
@Override
public ImageFloat32 getImage() {
return image;
}
@Override
public float get(float x, float y) {
if( x < 0 || y < 0 || x > image.width-1 || y > image.height-1 )
return get_border(x,y);
int xx = (int)x;
int yy = (int)y;
final int radius = kernel.getRadius();
final int width = kernel.getWidth();
int x0 = xx - radius;
int x1 = x0 + width;
int y0 = yy - radius;
int y1 = y0 + width;
if( x0 < 0 ) x0 = 0;
if( x1 > image.width ) x1 = image.width;
if( y0 < 0 ) y0 = 0;
if( y1 > image.height ) y1 = image.height;
float value = 0;
float totalWeightY = 0;
for( int i = y0; i < y1; i++ ) {
int indexSrc = image.startIndex + i*image.stride + x0;
float totalWeightX = 0;
float valueX = 0;
for( int j = x0; j < x1; j++ ) {
float w = kernel.compute(j-x);
totalWeightX += w;
valueX += w * (image.data[ indexSrc++ ]);
}
float w = kernel.compute(i-y);
totalWeightY += w;
value += w*valueX/totalWeightX;
}
value /= totalWeightY;
if( value > max )
return max;
else if( value < min )
return min;
else
return value;
}
public float get_border(float x, float y) {
int xx = (int)Math.floor(x);
int yy = (int)Math.floor(y);
final int radius = kernel.getRadius();
final int width = kernel.getWidth();
int x0 = xx - radius;
int x1 = x0 + width;
int y0 = yy - radius;
int y1 = y0 + width;
float value = 0;
for( int i = y0; i < y1; i++ ) {
float valueX = 0;
for( int j = x0; j < x1; j++ ) {
float w = kernel.compute(j-x);
valueX += w * border.get(j,i);
}
float w = kernel.compute(i-y);
value += w*valueX;
}
if( value > max )
return max;
else if( value < min )
return min;
else
return value;
}
@Override
public float get_fast(float x, float y) {
int xx = (int)x;
int yy = (int)y;
final int radius = kernel.getRadius();
final int width = kernel.getWidth();
int x0 = xx - radius;
int x1 = x0 + width;
int y0 = yy - radius;
int y1 = y0 + width;
float value = 0;
for( int i = y0; i < y1; i++ ) {
int indexSrc = image.startIndex + i*image.stride + x0;
float valueX = 0;
for( int j = x0; j < x1; j++ ) {
float w = kernel.compute(j-x);
valueX += w * (image.data[ indexSrc++ ]);
}
float w = kernel.compute(i-y);
value += w*valueX;
}
if( value > max )
return max;
else if( value < min )
return min;
else
return value;
}
@Override
public boolean isInFastBounds(float x, float y) {
float r = kernel.getRadius();
return (x-r >= 0 && y-r >= 0 && x+r < image.width && y+r getBorder() {
return border;
}
@Override
public ImageType getImageType() {
return ImageType.single(ImageFloat32.class);
}
}
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