![]() ![]() ![]() Images can also have only one channel with a value from 0 to 255. The red, green, blue channels - RGB - have a value from 0 to 255.įrom here on out we’ll talk about color images without alpha channel to keep it simple. Each pixel is a sequence of 3 integers and 1 optional float: red channel, green channel, blue channel, alpha (float that is optional). In other words, an image is a list (whole image) of lists (rows) of pixels (cells). image = list]]Ī NumPy esque definition would be a two-dimensional array of shape (h, w, 4), with h the number of pixels high (up and down), and w the number of pixels across (left to right). So, what is an image? In Python data terms, an image is a list of lists of tuples of integers. This resizing program will work just as well on anything from Instagram. Why? Because I have to over-complicate things, that’s why!Īctually, creating our own is a good way to illustrate what an image actually is. The command line program we are going to build can resize one or multiple image files at once.įor this example, we are going to create our own image rather than find a real one to manipulate.
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