(L) Flow calculated from cross correlation. (R) Flow calculated from ranked cross correlation.
Same as above, but showing all candidate vectors.
(L-1) Ranked cross correlation flow. (2) Flow filtered to keep only vectors with dx <= 0, dy <= dx, and CC != 0. (3) dy <= 0.5 * dx. (R-4) dy <= 0.25 * dx.
(TL-1) dx vs. x for #1 above. (2) Histogram of all dx values. (3) dx vs. x for #2 above. (BR-4) Histogram of dx.
(TL-1) dx vs. x for #3 above. (2) Histogram of all dx values. (3) dx vs. x for #4 above. (BR-4) Histogram of dx.
dx vs. y for #4 filtered vectors above. Each plot corresponds to one column of vectors in the flow. (L) Points showing data. (R) Lines drawn between points.
Ranked correlation vectors for single flow element with non-square domain and range, and range offset from domain.
2 different grids of non-overlapping non-square offset flow elements and resulting flow vectors for overlapping grid. Parameters for tiled and non-tiled grids are shown at bottom.
(L-1) Same geometry as at right above, but for 2x overlapping domain density in y. (2) 4x density in y. (R-3) #2 filtered to dy <= 0.25 *dx.
Vector file for #2 above. Columns are x1, y1, x2, y2, dx, dy, CC value.
dx vs. y profiles for #2 and #3 above. (R) Points show data support for #3.
High variation in vectors near poles may be due to projection distortion and lack of interpolation.