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 average intensities after CAH

Do CAH and calculate the sizes of each stipple based on the average intensities. Redraw the stipples. If the new stipple covers the old pixels after CAH, the old pixels won't be stipples any more.

(A) It seems it keeps some edges after half procedure.

(A) Half pixels are processed.
(B)Zoom in from (C)

(C) All pixels drawn as stipples

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

Three-level stippling similar effects to hightening

Kind of hightening effects: a very powerful expression for me.

It looks more interesting for me now to create three-level effects such as hightening.

Stippling based on grayness

After halftoning, there are nearly half number of black dots, nearly half number of white dots, and very few grey dots.

Halftoning to Stippling

Problems:

1. Not good at density control. From this view, the growing mask seems more promising.

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Scaling errors

Stippling
Halftoning
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(Half number of dots are used)

StipplingHalftoning
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Stippling
Halftoning
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