filter.h

#pragma once
#include<iostream>
#include<cv.h>
#include<highgui.h>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace cv;
// to use fast inverse method
#define FAST_INV

// cum sum like cumsum in matlab
Mat CumSum(const Mat& src, const int d);

//  %   BOXFILTER   O(1) time box filtering using cumulative sum
//	%
//	%   - Definition imDst(x, y)=sum(sum(imSrc(x-r:x+r,y-r:y+r)));
//  %   - Running time independent of r; 
//  %   - Equivalent to the function: colfilt(imSrc, [2*r+1, 2*r+1], 'sliding', @sum);
//  %   - But much faster.
Mat BoxFilter(const Mat& imSrc, const int r = 15);
//  %   GUIDEDFILTER   O(1) time implementation of guided filter.
//	%
//	%   - guidance image: I (should be a gray-scale/single channel image)
//	%   - filtering input image: p (should be a gray-scale/single channel image)
//	%   - local window radius: r
//	%   - regularization parameter: eps


Mat GuidedFilter(const Mat& I, const Mat& p, const int r = 15, const float eps = 0.01);//r=9
void costAggregation(const Mat&limg, const int maxDis, Mat* costVol);
void costAggregationRight(const Mat&rimg, const int maxDis, Mat* rcostVol);