 | 1 | initial version |
Hello
I am working on image data and the end goal is to use fourier transform on a product of the data and some complex matrix.
CV_64FC1 1000x1000 matrix of grayscaled image data (I have this)
Secondary 1000x1000 matrix of complex numbers (I don't have this)
The first matrix will multiply with the second complex matrix and after that I will use a fourier transform on it
Is there a way of doing this in OpenCV?
Hello
I am working on image data and the end goal is to use fourier transform on a product of the data and some complex matrix.
CV_64FC1 1000x1000 matrix of grayscaled image data (I have this)
Secondary 1000x1000 matrix of complex numbers (I don't have this)
The first matrix will multiply with the second complex matrix and after that I will use a fourier transform on it
Is there a way of doing this in OpenCV?
edit:
// image matrix
Bitmap bitmap_image = ...
Mat matrix = new Mat(1000, 1000, CvType.CV_64FC1);
Utils.bitmapToMat(bitmap_image, matrix);
Imgproc.cvtColor(matrix, matrix, Imgproc.COLOR_RGBA2GRAY);
matrix.convertTo(matrix, CvType.CV_64FC1, 1.0/255.0); // type when initialised is ignored
// secondary matrix
Mat secondary_matrix = new Mat(1000, 1000, CvType.CV_64FC1);
for (int i=0; i<1000; i++) {
for (int j=0; j<1000; j++) {
// ... do some stuff to get value
secondary matrix.put(i,j,value);
}
}
// now need to make secondary matrix complex by multiplying by some function of i
Hello
I am working on image data and the end goal is to use fourier transform on a product of the data and some complex matrix.
CV_64FC1 1000x1000 matrix of grayscaled image data (I have this)
Secondary 1000x1000 matrix of complex numbers (I don't have this)
The first matrix will multiply with the second complex matrix and after that I will use a fourier transform on it
Is there a way of doing this in OpenCV?
edit:
// image matrix
Bitmap bitmap_image = ...
Mat matrix = new Mat(1000, 1000, CvType.CV_64FC1);
Utils.bitmapToMat(bitmap_image, matrix);
Imgproc.cvtColor(matrix, matrix, Imgproc.COLOR_RGBA2GRAY);
matrix.convertTo(matrix, CvType.CV_64FC1, 1.0/255.0); // type when initialised is ignored
// secondary matrix
Mat secondary_matrix = new Mat(1000, 1000, CvType.CV_64FC1);
for (int i=0; i<1000; i++) {
for (int j=0; j<1000; j++) {
// ... do some stuff to get value
secondary matrix.put(i,j,value);
}
}
// now need to make secondary matrix complex by multiplying by some function of i
// complex numbers created in Java according to the Apache Commons complex class
Hello
I am working on image data and the end goal is to use fourier transform on a product of the data and some complex matrix.
CV_64FC1 1000x1000 matrix of grayscaled image data (I have this)
Secondary 1000x1000 matrix of complex numbers (I don't have this)
The first matrix will multiply with the second complex matrix and after that I will use a fourier transform on it
Is there a way of doing this in OpenCV?
edit:
// image matrix
Bitmap bitmap_image = ...
Mat matrix = new Mat(1000, 1000, CvType.CV_64FC1);
Utils.bitmapToMat(bitmap_image, matrix);
Imgproc.cvtColor(matrix, matrix, Imgproc.COLOR_RGBA2GRAY);
matrix.convertTo(matrix, CvType.CV_64FC1, 1.0/255.0); // type when initialised is ignored
// secondary matrix
Mat secondary_matrix = new Mat(1000, 1000, CvType.CV_64FC1);
for (int i=0; i<1000; i++) {
for (int j=0; j<1000; j++) {
// ... do some stuff to get value
secondary matrix.put(i,j,value);
}
}
// now need to make secondary matrix complex by multiplying by some function of i
// complex numbers created in Java according to the Apache Commons complex class
Hello
I am working on image data and the end goal is to use fourier transform on a product of the data and some complex matrix.
CV_64FC1 1000x1000 matrix of grayscaled image data (I have this)
Secondary 1000x1000 matrix of complex numbers (I don't have this)
The first matrix will multiply with the second complex matrix and after that I will use a fourier transform on it
Is there a way of doing this in OpenCV?
edit:
// image matrix
Bitmap bitmap_image = ...
Mat matrix = new Mat(1000, 1000, CvType.CV_64FC1);
Utils.bitmapToMat(bitmap_image, matrix);
Imgproc.cvtColor(matrix, matrix, Imgproc.COLOR_RGBA2GRAY);
matrix.convertTo(matrix, CvType.CV_64FC1, 1.0/255.0); // type when initialised is ignored
// secondary matrix
Mat secondary_matrix = new Mat(1000, 1000, CvType.CV_64FC1);
for (int i=0; i<1000; i++) {
for (int j=0; j<1000; j++) {
// ... do some stuff to get value
secondary matrix.put(i,j,value);
}
}
// now need to make secondary matrix complex by multiplying by some function of i
edit2:
Context: I have a hologram image in OpenCV matrix form (single channel), I have another matrix filled with real numbers (single channel) - this matrix represents the sampling period in the spatial domain. This latter matrix isn't used directly, it passes through an e^(i*...) function to make the values complex. Finally, a discrete fourier transform is applied on the per-element product of the image data and this complex matrix I just described.
