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#include "precomp.hpp"
#include "opencv2/videostab/deblurring.hpp"
#include "opencv2/videostab/global_motion.hpp"
#include "opencv2/videostab/ring_buffer.hpp"
namespace cv
{
namespace videostab
{
float calcBlurriness(const Mat &frame)
{
Mat Gx, Gy;
Sobel(frame, Gx, CV_32F, 1, 0);
Sobel(frame, Gy, CV_32F, 0, 1);
double normGx = norm(Gx);
double normGy = norm(Gy);
double sumSq = normGx*normGx + normGy*normGy;
return static_cast<float>(1. / (sumSq / frame.size().area() + 1e-6));
}
WeightingDeblurer::WeightingDeblurer()
{
setSensitivity(0.1f);
}
void WeightingDeblurer::deblur(int idx, Mat &frame)
{
CV_Assert(frame.type() == CV_8UC3);
bSum_.create(frame.size());
gSum_.create(frame.size());
rSum_.create(frame.size());
wSum_.create(frame.size());
for (int y = 0; y < frame.rows; ++y)
{
for (int x = 0; x < frame.cols; ++x)
{
Point3_<uchar> p = frame.at<Point3_<uchar> >(y,x);
bSum_(y,x) = p.x;
gSum_(y,x) = p.y;
rSum_(y,x) = p.z;
wSum_(y,x) = 1.f;
}
}
for (int k = idx - radius_; k <= idx + radius_; ++k)
{
const Mat &neighbor = at(k, *frames_);
float bRatio = at(idx, *blurrinessRates_) / at(k, *blurrinessRates_);
Mat_<float> M = getMotion(idx, k, *motions_);
if (bRatio > 1.f)
{
for (int y = 0; y < frame.rows; ++y)
{
for (int x = 0; x < frame.cols; ++x)
{
int x1 = cvRound(M(0,0)*x + M(0,1)*y + M(0,2));
int y1 = cvRound(M(1,0)*x + M(1,1)*y + M(1,2));
if (x1 >= 0 && x1 < neighbor.cols && y1 >= 0 && y1 < neighbor.rows)
{
const Point3_<uchar> &p = frame.at<Point3_<uchar> >(y,x);
const Point3_<uchar> &p1 = neighbor.at<Point3_<uchar> >(y1,x1);
float w = bRatio * sensitivity_ /
(sensitivity_ + std::abs(intensity(p1) - intensity(p)));
bSum_(y,x) += w * p1.x;
gSum_(y,x) += w * p1.y;
rSum_(y,x) += w * p1.z;
wSum_(y,x) += w;
}
}
}
}
}
for (int y = 0; y < frame.rows; ++y)
{
for (int x = 0; x < frame.cols; ++x)
{
float wSumInv = 1.f / wSum_(y,x);
frame.at<Point3_<uchar> >(y,x) = Point3_<uchar>(
static_cast<uchar>(bSum_(y,x)*wSumInv),
static_cast<uchar>(gSum_(y,x)*wSumInv),
static_cast<uchar>(rSum_(y,x)*wSumInv));
}
}
}
} // namespace videostab
} // namespace cv