Reaction : Imaging Vector Fields Using Line Integral Convolution

Line integral convolution represents a new and general method
for imaging two- and three-dimensional vector fields. The algorithm
filters an input image along local stream lines defined by an
input vector field and generates an output image. Figure 3 is really an interesting one.A two-dimensional vector field showing the local stream line starting in cell (x, y) shows the direction of the flow. When we scroll we actually can see as thought there is motion. It is mainly because of the arrow in different direction differed by a small degree, when scrolled we see the overlapping of arrows and hence we see a motion in the direction of the arrows.