Process each stipple in parallel

A result from 20 iterations(There is a bug for the use of direction).

Have to find a way to control the density and think about the first placement.

First try for displaying patterns(maybe useless maybe not)

#define DEF_MAXIMUM_COST_SPREAD 6000

#define DEF_MINIMUM_LENGTH_DENTRITE 0

#define DEF_WEIGHT_GRADIENT 20

Not well-defined for shapes and well-defined for sizes

It is possible to show patterns, but the quality of the patterns is questionable. And did not see many advantages over the texture-mapping way. But still interesting for me.

Stippling with sizes from merged dots after CAH

Do the merging based on the CAH and redraw the stipples based on the sizes of the merged dots.

Problems:

1) Not follow the edges well. Might be improved by adjusting the center position when redrawing.

2) Tone is not good, either.

Good:

1) It seems it is promising if we can find a good selection from CAH

(A)

Do not draw the small stipples.

(B)

All of stipples

Visulization for orders

I=80
I=150
I=5
I = 128
I = 5 ,80,128,192,250



It seems the orders work fine.

Some patterns can be created.

These patterns are created by partially choosing some pixels around the center not to be updated by the function. But the tone matching is still not good.

Kind of smudging effects

I am not sure if this is what are called smearing effects. But for me, it smudges the images. It did not do a good job for images with textures.

Strange effects

using the regular mask

using the spiral mask

I guess this is the effect we want, but still has issues.

It seems the method catches the constrast or maybe we can say it obeys the edges. But it does not follow the tone correctly.

It seems the artefacts are from the function I chosen. But right now I do not know how to avoid them.

Strange effects

Effect 1

Effect 2

The threshold is based on the accumulation and the discontinuous increase for the chosen function.