1 #ifndef COMPLEX_MAT_HPP_213123048309482094
2 #define COMPLEX_MAT_HPP_213123048309482094
4 #include <opencv2/opencv.hpp>
9 template <typename T> class ComplexMat_ {
16 ComplexMat_() : cols(0), rows(0), n_channels(0) {}
17 ComplexMat_(uint _rows, uint _cols, uint _n_channels) : cols(_cols), rows(_rows), n_channels(_n_channels)
19 p_data.resize(n_channels * cols * rows);
22 ComplexMat_(uint _rows, uint _cols, uint _n_channels, uint _n_scales)
23 : cols(_cols), rows(_rows), n_channels(_n_channels), n_scales(_n_scales)
25 p_data.resize(n_channels * cols * rows);
28 // assuming that mat has 2 channels (real, img)
29 ComplexMat_(const cv::Mat &mat) : cols(uint(mat.cols)), rows(uint(mat.rows)), n_channels(1)
31 p_data = convert(mat);
34 void create(uint _rows, uint _cols, uint _n_channels)
38 n_channels = _n_channels;
39 p_data.resize(n_channels * cols * rows);
42 void create(uint _rows, uint _cols, uint _n_channels, uint _n_scales)
46 n_channels = _n_channels;
48 p_data.resize(n_channels * cols * rows);
50 // cv::Mat API compatibility
51 cv::Size size() { return cv::Size(cols, rows); }
52 int channels() { return n_channels; }
53 int channels() const { return n_channels; }
55 // assuming that mat has 2 channels (real, imag)
56 void set_channel(int idx, const cv::Mat &mat)
58 assert(idx >= 0 && idx < n_channels);
59 for (int i = 0; i < rows; ++i) {
60 const std::complex<T> *row = mat.ptr<std::complex<T>>(i);
61 for (int j = 0; j < cols; ++j)
62 p_data[idx * rows * cols + i * cols + j] = row[j];
68 int n_channels_per_scale = n_channels / n_scales;
70 for (int i = 0; i < n_channels_per_scale; ++i) {
71 for (auto lhs = p_data.begin() + i * rows * cols; lhs != p_data.begin() + (i + 1) * rows * cols; ++lhs)
72 sum_sqr_norm += lhs->real() * lhs->real() + lhs->imag() * lhs->imag();
74 sum_sqr_norm = sum_sqr_norm / static_cast<T>(cols * rows);
78 void sqr_norm(T *sums_sqr_norms) const
80 int n_channels_per_scale = n_channels / n_scales;
81 int scale_offset = n_channels_per_scale * rows * cols;
83 for (uint scale = 0; scale < n_scales; ++scale) {
85 for (int i = 0; i < n_channels_per_scale; ++i)
86 for (auto lhs = p_data.begin() + i * rows * cols + scale * scale_offset;
87 lhs != p_data.begin() + (i + 1) * rows * cols + scale * scale_offset; ++lhs)
88 sum_sqr_norm += lhs->real() * lhs->real() + lhs->imag() * lhs->imag();
89 sums_sqr_norms[scale] = sum_sqr_norm / static_cast<T>(cols * rows);
94 ComplexMat_<T> sqr_mag() const
96 return mat_const_operator([](std::complex<T> &c) { c = c.real() * c.real() + c.imag() * c.imag(); });
99 ComplexMat_<T> conj() const
101 return mat_const_operator([](std::complex<T> &c) { c = std::complex<T>(c.real(), -c.imag()); });
104 ComplexMat_<T> sum_over_channels() const
106 assert(p_data.size() > 1);
108 int n_channels_per_scale = n_channels / n_scales;
109 int scale_offset = n_channels_per_scale * rows * cols;
111 ComplexMat_<T> result(this->rows, this->cols, n_scales);
112 for (uint scale = 0; scale < n_scales; ++scale) {
113 std::copy(p_data.begin() + scale * scale_offset, p_data.begin() + rows * cols + scale * scale_offset,
114 result.p_data.begin() + scale * rows * cols);
115 for (int i = 1; i < n_channels_per_scale; ++i) {
116 std::transform(result.p_data.begin() + scale * rows * cols,
117 result.p_data.begin() + (scale + 1) * rows * cols,
118 p_data.begin() + i * rows * cols + scale * scale_offset,
119 result.p_data.begin() + scale * rows * cols, std::plus<std::complex<T>>());
125 // return 2 channels (real, imag) for first complex channel
126 cv::Mat to_cv_mat() const
128 assert(p_data.size() >= 1);
129 return channel_to_cv_mat(0);
131 // return a vector of 2 channels (real, imag) per one complex channel
132 std::vector<cv::Mat> to_cv_mat_vector() const
134 std::vector<cv::Mat> result;
135 result.reserve(n_channels);
137 for (int i = 0; i < n_channels; ++i)
138 result.push_back(channel_to_cv_mat(i));
143 std::complex<T> *get_p_data() const { return p_data.data(); }
145 // element-wise per channel multiplication, division and addition
146 ComplexMat_<T> operator*(const ComplexMat_<T> &rhs) const
148 return mat_mat_operator([](std::complex<T> &c_lhs, const std::complex<T> &c_rhs) { c_lhs *= c_rhs; }, rhs);
150 ComplexMat_<T> operator/(const ComplexMat_<T> &rhs) const
152 return mat_mat_operator([](std::complex<T> &c_lhs, const std::complex<T> &c_rhs) { c_lhs /= c_rhs; }, rhs);
154 ComplexMat_<T> operator+(const ComplexMat_<T> &rhs) const
156 return mat_mat_operator([](std::complex<T> &c_lhs, const std::complex<T> &c_rhs) { c_lhs += c_rhs; }, rhs);
159 // multiplying or adding constant
160 ComplexMat_<T> operator*(const T &rhs) const
162 return mat_const_operator([&rhs](std::complex<T> &c) { c *= rhs; });
164 ComplexMat_<T> operator+(const T &rhs) const
166 return mat_const_operator([&rhs](std::complex<T> &c) { c += rhs; });
169 // multiplying element-wise multichannel by one channel mats (rhs mat is with one channel)
170 ComplexMat_<T> mul(const ComplexMat_<T> &rhs) const
172 return matn_mat1_operator([](std::complex<T> &c_lhs, const std::complex<T> &c_rhs) { c_lhs *= c_rhs; }, rhs);
175 // multiplying element-wise multichannel by one channel mats (rhs mat is with multiple channel)
176 ComplexMat_<T> mul2(const ComplexMat_<T> &rhs) const
178 return matn_mat2_operator([](std::complex<T> &c_lhs, const std::complex<T> &c_rhs) { c_lhs *= c_rhs; }, rhs);
182 friend std::ostream &operator<<(std::ostream &os, const ComplexMat_<T> &mat)
184 // for (int i = 0; i < mat.n_channels; ++i){
185 for (int i = 0; i < 1; ++i) {
186 os << "Channel " << i << std::endl;
187 for (uint j = 0; j < mat.rows; ++j) {
188 for (uint k = 0; k < mat.cols - 1; ++k)
189 os << mat.p_data[j * mat.cols + k] << ", ";
190 os << mat.p_data[j * mat.cols + mat.cols - 1] << std::endl;
197 mutable std::vector<std::complex<T>> p_data;
199 // convert 2 channel mat (real, imag) to vector row-by-row
200 std::vector<std::complex<T>> convert(const cv::Mat &mat)
202 std::vector<std::complex<T>> result;
203 result.reserve(mat.cols * mat.rows);
204 for (int y = 0; y < mat.rows; ++y) {
205 const T *row_ptr = mat.ptr<T>(y);
206 for (int x = 0; x < 2 * mat.cols; x += 2) {
207 result.push_back(std::complex<T>(row_ptr[x], row_ptr[x + 1]));
213 ComplexMat_<T> mat_mat_operator(void (*op)(std::complex<T> &c_lhs, const std::complex<T> &c_rhs),
214 const ComplexMat_<T> &mat_rhs) const
216 assert(mat_rhs.n_channels == n_channels && mat_rhs.cols == cols && mat_rhs.rows == rows);
218 ComplexMat_<T> result = *this;
219 for (uint i = 0; i < n_channels; ++i) {
220 auto lhs = result.p_data.begin() + i * rows * cols;
221 auto rhs = mat_rhs.p_data.begin() + i * rows * cols;
222 for (; lhs != result.p_data.begin() + (i + 1) * rows * cols; ++lhs, ++rhs)
228 ComplexMat_<T> matn_mat1_operator(void (*op)(std::complex<T> &c_lhs, const std::complex<T> &c_rhs),
229 const ComplexMat_<T> &mat_rhs) const
231 assert(mat_rhs.n_channels == 1 && mat_rhs.cols == cols && mat_rhs.rows == rows);
233 ComplexMat_<T> result = *this;
234 for (uint i = 0; i < n_channels; ++i) {
235 auto lhs = result.p_data.begin() + i * rows * cols;
236 auto rhs = mat_rhs.p_data.begin();
237 for (; lhs != result.p_data.begin() + (i + 1) * rows * cols; ++lhs, ++rhs)
243 ComplexMat_<T> matn_mat2_operator(void (*op)(std::complex<T> &c_lhs, const std::complex<T> &c_rhs),
244 const ComplexMat_<T> &mat_rhs) const
246 assert(mat_rhs.n_channels == n_channels / n_scales && mat_rhs.cols == cols && mat_rhs.rows == rows);
248 int n_channels_per_scale = n_channels / n_scales;
249 int scale_offset = n_channels_per_scale * rows * cols;
250 ComplexMat_<T> result = *this;
251 for (uint i = 0; i < n_scales; ++i) {
252 for (int j = 0; j < n_channels_per_scale; ++j) {
253 auto lhs = result.p_data.begin() + (j * rows * cols) + (i * scale_offset);
254 auto rhs = mat_rhs.p_data.begin() + (j * rows * cols);
255 for (; lhs != result.p_data.begin() + ((j + 1) * rows * cols) + (i * scale_offset); ++lhs, ++rhs)
262 ComplexMat_<T> mat_const_operator(const std::function<void(std::complex<T> &c_rhs)> &op) const
264 ComplexMat_<T> result = *this;
265 for (uint i = 0; i < n_channels; ++i)
266 for (auto lhs = result.p_data.begin() + i * rows * cols;
267 lhs != result.p_data.begin() + (i + 1) * rows * cols; ++lhs)
272 cv::Mat channel_to_cv_mat(int channel_id) const
274 cv::Mat result(rows, cols, CV_32FC2);
275 for (int y = 0; y < rows; ++y) {
276 std::complex<T> *row_ptr = result.ptr<std::complex<T>>(y);
277 for (int x = 0; x < cols; ++x) {
278 row_ptr[x] = p_data[channel_id * rows * cols + y * cols + x];
285 typedef ComplexMat_<float> ComplexMat;
287 #endif // COMPLEX_MAT_HPP_213123048309482094