Play around with the graph (desktop only) – the shape is pretty cool. Each pixel is colored to reflect its color in the original image. This results in fewer pixels, though the distribution and shape of the image’s pixels is still the same. Note that I’ve sampled the input photo down before plotting it. Plotting each pixel from the above image in an RGB space looks like this. Each dimension ranges from 0 to 255 (assuming 24-bit color). Here, each pixel has a red, green, and blue component (or dimension). Since each pixel’s color can be represented in RGB format, we can plot each pixel in a three-dimensional RGB (red, green, blue) color space. The first step in color palette extraction is to represent the colors of an image in a mathematical way. All of the approaches we’ll discuss allow some control over the number of colors to extract.įor this post, we’ll focus on extracting a 10 color palette from the photo below. How large or small this set of colors should be can be subjective. PalettesĬonceptually, extracting a palette from an image is simple – the goal is to detect a set of colors that capture the mood of the image. You can find the code for it on Github and a live version of it here. I also wrote an interactive web app to allow folks to play around with the different approaches I’m going to discuss. In this post, I’ll introduce some common approaches for extracting color palettes from images. The colors in a photo are usually highly correlated and reflect natural color palettes of their content. An easy “something” to extract them from is an image (or photo). It’s easy to choose some random colors, but generating a coherent and aesthetically pleasing palette in an automated way is not easy.Ī happy medium between creating palettes by hand and automatically generating them is to extract them from something–essentially borrowing inspiration from somewhere else. Although there have been some attempts to procedurally generate palettes, automated palette creation is very difficult. Color palettes are usually carefully hand-selected to reflect a desired design aesthetic.
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