我試圖遵循謹慎傅立葉變換(DFT)這裏的例子: http://docs.opencv.org/doc/tutorials/core/discrete_fourier_transform/discrete_fourier_transform.htmlOpenCV的:數據類型斷言失敗,分裂()函數
我快遞在Windows上的Visual Studio 2013上運行2.4.8 8.
我修改的示例,使得代替加載灰度圖像我使用從我的攝像頭拍攝到的彩色圖像(裝入墊變量)。
當我運行上面的例子中,我得到以下錯誤:
"Assertion Failed Tp>::channels == m.channels()) in cv::Mat::operator"
,並在以下行一休:
Mat planes[] = { Mat_<float>(padded), Mat::zeros(padded.size(), CV_32F) };
環顧四周,我看到了,這是老樣子之間轉換類型,所以我添加了這些行來將所有內容轉換爲CV_32F:
padded.convertTo(padded32, CV_32F);
Mat planes[] = { padded32, Mat::zeros(padded32.size(), CV_32F) };
現在的問題是我得到另一種說法失敗的幾行下來:
split(complexI, planes);
的錯誤是:
"Assertion Failed (Type == CV_32FC1 || Type == CV_32FC2 || ... || Type == CV_64FC2) in cv::dft"
所以現在看起來它不喜歡的CV_32F數據類型。我試着讓數據類型CV_32FC1,但它有相同的錯誤。我懷疑它與dft()函數的complexI的輸出數據類型有關,但我不知道該怎麼做。它也可能與我輸入的通道數量有關(3通道顏色與1通道灰度圖像)。
感謝您的幫助。從鏈接的例子
完整代碼:
#include "opencv2/core/core.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <iostream>
int main(int argc, char ** argv)
{
const char* filename = argc >=2 ? argv[1] : "lena.jpg";
Mat I = imread(filename, CV_LOAD_IMAGE_GRAYSCALE);
if(I.empty())
return -1;
Mat padded; //expand input image to optimal size
int m = getOptimalDFTSize(I.rows);
int n = getOptimalDFTSize(I.cols); // on the border add zero values
copyMakeBorder(I, padded, 0, m - I.rows, 0, n - I.cols, BORDER_CONSTANT, Scalar::all(0));
Mat planes[] = {Mat_<float>(padded), Mat::zeros(padded.size(), CV_32F)};
Mat complexI;
merge(planes, 2, complexI); // Add to the expanded another plane with zeros
dft(complexI, complexI); // this way the result may fit in the source matrix
// compute the magnitude and switch to logarithmic scale
// => log(1 + sqrt(Re(DFT(I))^2 + Im(DFT(I))^2))
split(complexI, planes); // planes[0] = Re(DFT(I), planes[1] = Im(DFT(I))
magnitude(planes[0], planes[1], planes[0]);// planes[0] = magnitude
Mat magI = planes[0];
magI += Scalar::all(1); // switch to logarithmic scale
log(magI, magI);
// crop the spectrum, if it has an odd number of rows or columns
magI = magI(Rect(0, 0, magI.cols & -2, magI.rows & -2));
// rearrange the quadrants of Fourier image so that the origin is at the image center
int cx = magI.cols/2;
int cy = magI.rows/2;
Mat q0(magI, Rect(0, 0, cx, cy)); // Top-Left - Create a ROI per quadrant
Mat q1(magI, Rect(cx, 0, cx, cy)); // Top-Right
Mat q2(magI, Rect(0, cy, cx, cy)); // Bottom-Left
Mat q3(magI, Rect(cx, cy, cx, cy)); // Bottom-Right
Mat tmp; // swap quadrants (Top-Left with Bottom-Right)
q0.copyTo(tmp);
q3.copyTo(q0);
tmp.copyTo(q3);
q1.copyTo(tmp); // swap quadrant (Top-Right with Bottom-Left)
q2.copyTo(q1);
tmp.copyTo(q2);
normalize(magI, magI, 0, 1, CV_MINMAX); // Transform the matrix with float values into a
// viewable image form (float between values 0 and 1).
imshow("Input Image" , I ); // Show the result
imshow("spectrum magnitude", magI);
waitKey();
return 0;
}
謝謝你,我不知道mixChannels沒有。我會嘗試將它們分離出來,然後將它們分開 – user1626589