Aliasing a drawing

When we look at an image on a display, we are actually looking at thousands of squares of light. This is different from what we see in the real world. The fact that we simulate details with small squares is called {\it aliasing}.

Generally, we want to diminish aliasing. But sometimes we can't. We might not have the detail we want in a picture. Or, we might just find the effect of aliasing interesting. So, we started with an image like this:


Then we created a sketch that aliases at a resolution of our choosing. Here it is, using blocks of 20x20 pixels. Each block is mapped to a shade of grey.

And as usual, once a sketch is working, we think of variations. In the sketch below, I imagined watching a ball moving forward and backward behind a glass that somehow aliases my view of the ball. When the ball is farther away, it is more aliased.

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