matlab中meshgrid()、fspecial()以及 imfilter()函数C++实现

struct twodouble {
double begin;
double end;
};

void meshgrid(const struct twodouble &_Input2X, const struct twodouble &_Input2Y, float _size, cv::Mat &_OutputMatX, cv::Mat &_OutputMatY)
{
std::vector<float> t_x, t_y;
double temp = 0.0f;

// x
if (_Input2X.begin == _Input2X.end) {
for (double i = 0; i <= 1; i += _size) {
t_x.push_back(_Input2X.begin);
}
}
else if (_Input2X.begin < _Input2X.end) {
for (double i = _Input2X.begin; i <= _Input2X.end;
i += _size) {
t_x.push_back(i);
}
}
else {
for (double i = _Input2X.begin; i >= _Input2X.end;
i -= _size) {
t_x.push_back(i);
}
}