I have the
extrinsics matrices for my camera obtained via
Now I want to use these paramenters to compute the
BEV (Bird Eye View) transformation for any given coordinates in a frame obtained from the camera.
openCv function can be used to compute the
BEV perspective transformation for given point coordinates and the camera
I found something very related in the following post:
https://deepnote.com/article/social-distancing-detector/ based on
they are using
cv2.getPerspectiveTransform() to get a
3X3 matrix, but I don't know whether this matrix represents the
extrinsecs or something else. Then they are transforming the list of points using such matrix in the following way:
#Assuming list_downoids is the list of points to be transformed and matrix is the one obtained above
list_points_to_detect = np.float32(list_downoids).reshape(-1, 1, 2)
transformed_points = cv2.perspectiveTransform(list_points_to_detect, matrix)
I really need to know if I can use this
cv2.perspectiveTransform function to compute the transformation or if there's another better way to do this using the
intrinsics or both, without having to reuse the frame, since I already have the coordinates of people detected in the frame saved into an array.
Somebody just told me I can reach this if I have at least 3 3D points by using the
cv2.findHomography function. I'm trying this approach now. Does anyone else have another input?