- sampling in a non perpendicular direction to the FOV dims.
- EVEN sampling
- then the neighbored samples are not supposed to overlap angularly
- also, the neighbored samples should be a real edge point, i.e., in the radial direction, no other same CC point exists.
- if SR too big, lose point -> in between "neighboring" points there are other edge points.
- sampling rate should come from audio sampling rate
Right way to do
- extract all edges
- sample edges according to the audio rate, and (r, a) parameters, variable rate across radii
angular sampling
- if we take all points between [a1, a2], we get a thick stripe, that way, lower SR always leads to more data, and by taking the head and tail of the group, we won't necessarily get the rightly spaced edge points.
- right way:
- don't take the [a1, a2], but use [a1-e, a1+e], e is the tunable offset.
- e << (a2-a1)/2;
- e = ratio * angle_per_sample.
- e should make the angular group thin enough,
- ratio should be adaptive, by looking at the width of the angular group, should be
