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suace.cpp
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suace.cpp
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/*////////////////////////////////////////////////////////////////////////////////////////
// BSD 2-Clause License
// Copyright (c) 2017, Ravimal Bandara
// All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/////////////////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "suace.h"
#include <opencv2\opencv.hpp>
#include <opencv2\imgcodecs.hpp>
#include <opencv2\imgproc\imgproc.hpp>
#include <opencv2\highgui\highgui.hpp>
using namespace cv;
using namespace std;
void performSUACE(Mat & src, Mat & dst, int distance, double sigma) {
CV_Assert(src.type() == CV_8UC1);
if (!(distance > 0 && sigma > 0)) {
CV_Error(CV_StsBadArg, "distance and sigma must be greater 0");
}
dst = Mat(src.size(), CV_8UC1);
Mat smoothed;
int val;
int a, b;
int adjuster;
int half_distance = distance / 2;
double distance_d = distance;
GaussianBlur(src, smoothed, cv::Size(0, 0), sigma);
for (int x = 0;x<src.cols;x++)
for (int y = 0;y < src.rows;y++) {
val = src.at<uchar>(y, x);
adjuster = smoothed.at<uchar>(y, x);
if ((val - adjuster) > distance_d)adjuster += (val - adjuster)*0.5;
adjuster = adjuster < half_distance ? half_distance : adjuster;
b = adjuster + half_distance;
b = b > 255 ? 255 : b;
a = b - distance;
a = a < 0 ? 0 : a;
if (val >= a && val <= b)
{
dst.at<uchar>(y, x) = (int)(((val - a) / distance_d) * 255);
}
else if (val < a) {
dst.at<uchar>(y, x) = 0;
}
else if (val > b) {
dst.at<uchar>(y, x) = 255;
}
}
}