Kaleidoscope is a tool to create kaleidoscope-like GIF arts using the delaunay triangulation technique. It takes an image as input and it converts to abstract GIF composed of tiles of triangles.
- First the image is blured out to smothen the sharp pixel edges. The more blured an image is the more diffused the generated output will be.
- Second the resulted image is converted to grayscale mode.
- Then a sobel filter operator is applied on the grayscaled image to obtain the image edges. An optional threshold value is applied to filter out the representative pixels of the resulting image.
- Lastly we apply the delaunay algorithm on the pixels obtained from the previous step.
blur = tri.Stackblur(img, uint32(width), uint32(height), uint32(*blurRadius))
gray = tri.Grayscale(blur)
sobel = tri.SobelFilter(gray, float64(*sobelThreshold))
points = tri.GetEdgePoints(sobel, *pointsThreshold, *maxPoints)
triangles = delaunay.Init(width, height).Insert(points).GetTriangles()$ go get github.com/fogleman/gg
$ go build ./src/main.go$ ./main --helpThe following flags are supported:
| Flag | Default | Description |
|---|---|---|
in |
n/a | Input file |
out |
n/a | Output file |
blur |
4 | Blur radius |
max |
2500 | Maximum number of points |
noise |
0 | Noise factor |
points |
20 | Points threshold |
sobel |
10 | Sobel filter threshold |
solid |
false | Solid line color |
wireframe |
0 | Wireframe mode (without,with,both) |
width |
1 | Wireframe line width |
Setting a lower points value, the resulted image will be more like a cubic painting. You can even add a noise factor, giving a more artistic, despeckle like result for the final image.
Here are some examples you can experiment with:
$ ./main -in samples/clown_4.jpg -out output.png -wireframe=0 -max=3500 -width=2 -blur=2
$ ./main -in samples/clown_4.jpg -out output.png -wireframe=2 -max=5500 -width=1 -blur=10This project is based on esimov/triangle, Which is under the MIT License. This project is also under MIT License.