Stephen Gruppetta @s_gruppetta@qoto.org

…and different frequencies—these are spatial frequencies, not temporal ones

/6

…different amplitudes…

Sinusoidal gratings can have different orientations…

/4

It’s called a sinusoidal grating because the grayscale values vary according to the sine function.

If you plot the values along a horizontal line of the grating, you’ll get a plot of a sine function

/3

**Any** image can be reconstructed from a series of sinusoidal gratings.

A sinusoidal grating looks like this…

#sinusoidal #grating

/2

What's an image made of?

There are many correct answers.

But the most fascinating one is: << sines & cosines >>

Read on if you're intrigued👇🧵🪡

#python #images #fourier

/1

The Intermediate Python Functions Series is here, now also as a series of short articles.

Here's the first of seven…

#Python https://thepythoncodingbook.com/2022/11/05/intermediate-python-functions-series-1/