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/*
* Copyright (c) 2011-2017, 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.transform.ii.impl;
import boofcv.alg.transform.ii.IntegralImageOps;
import boofcv.struct.image.GrayS32;
import boofcv.struct.sparse.SparseScaleSample_F64;
/**
* Samples a square region inside an integral image
*
* @author Peter Abeles
*/
public class SparseIntegralSample_I32 extends SparseScaleSample_F64 {
int r;
@Override
public void setWidth(double width) {
r = ((int)( width + 0.5 ))/2;
if( r <= 0 )
r = 1;
x0 = y0 = -r-1;
x1 = y1 = r;
}
@Override
public double compute(int x, int y) {
return IntegralImageOps.block_unsafe(input,x+x0,y+y0,x+x1,y+y1);
}
}
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