Pixelating an image lowers its resolution so you can’t make out what’s in it, and it keeps the original colors. Pixel art uses a coarse grid too, but adds a small fixed palette and, traditionally, pixels placed on purpose. That palette step is the whole difference, and it’s why a plain pixelate filter makes a photo look censored while a pixel art converter makes it look like a game.
The short version #
| Pixelating | Pixel art | |
|---|---|---|
| Purpose | Hide or obscure something | Make a stylized image |
| Colors | Original colors, averaged | Mapped to a small fixed palette |
| Typical color count | Hundreds or thousands | 4 to 64 |
| Dithering | None | Often |
| Who decides each pixel | An averaging filter | An artist, or a converter’s palette |
| Looks like | A blurred-out face on the news | A Game Boy screenshot |
What pixelating actually is #
Wikipedia’s article on pixelization defines it as “any technique used in editing images or video, whereby an image is blurred by displaying part or all of it at a markedly lower resolution.” The main use is censorship: obscuring faces, nudity, license plates, documents.
Technically it’s one operation. The image is divided into blocks, and every pixel in a block is replaced with the block’s average color. That’s it. No palette, no dithering, no decisions.
The article also notes a weakness worth knowing if you’re using it to hide something: “any differences between the large pixels can be exploited in moving images to reconstruct the original, unpixelized image.” Pixelating a face across many video frames leaks more information than pixelating it once. For real redaction, a solid block beats a pixelated one.
Three similar words #
They get mixed up constantly, and they mean different things:
- Pixelization (or pixelisation) is the deliberate technique above, used for censorship or effect.
- Pixelation is the undesirable visibility of individual pixels, the thing that happens when you enlarge a small image too far.
- Pixilation is a stop-motion animation technique using live actors as the subjects, and has nothing to do with either.
In everyday use, “pixelate” covers the first two, and almost nobody says “pixelization” out loud.
What makes it pixel art instead #
Pixel art starts from the same grid, then does two more things.
It limits the palette. Every cell gets mapped to the nearest color in a small set: four greens for a Game Boy look, sixteen for PICO-8 or the Commodore 64, a few dozen for the NES. This is what produces the retro look, because the colors themselves become recognizable. What pixel art is covers the form in general.
It often dithers. With a small palette, a smooth gradient like a sky or a cheek has nowhere to go, and it breaks into hard bands. Dithering mixes two palette colors in a pattern that reads as a third from a distance. What dithering is shows what the different algorithms do. A pixelate filter never dithers, because it isn’t trying to fake colors it doesn’t have.
There’s a third, stricter criterion. Traditional pixel art means each pixel was placed deliberately by an artist, usually in an editor, at a size where every pixel counts. By that definition a converted photo is a pixel art style rather than pixel art, and many artists treat a conversion as the base layer they then clean up by hand.
Why your “pixel art” looks like a censored photo #
The most common complaint about converter output, and it has one cause almost every time: the tool pixelated without quantizing. Zoom in. If you can count dozens of slightly different shades in what should be a flat area, there’s no palette being applied.
Fix it by using a tool that actually maps to a palette. In Pixelize, the pixel size and the palette are separate controls, so you set the grid on the Pixel tab and then choose from 25 hex-accurate palettes on the Color tab, from the Game Boy’s four greens to the NES and PICO-8. Turning dithering on from the same tab handles the gradients. 8-bit photo filter covers why some filters produce a censored look and others produce a game screen.
The other frequent cause is the enlargement. If the blocks have soft edges, the image was scaled with smooth interpolation or saved as JPEG. How to upscale pixel art without blur covers nearest-neighbor scaling and whole-number multiples.
When to use which #
Pixelate when you want to hide a face, a screen, a document or a plate. Use a heavy block size, and consider a solid box instead for anything sensitive, since pixelation can sometimes be reversed in video.
Use pixel art when you want a stylized image: a profile picture, a sticker, a wallpaper, a game sprite, a print. The palette is the point, so choose it first and let it drive the mood.
A useful test: if someone should be unable to recognize the subject, you want pixelation. If someone should recognize the subject and enjoy how it looks, you want pixel art.
Frequently asked questions #
Is pixelating the same as pixel art? #
No. Pixelating averages blocks of the original image and keeps its colors, which is used to obscure content. Pixel art maps the image to a small fixed palette, usually with dithering, to create a deliberate retro style.
How do I turn a pixelated photo into pixel art? #
Apply a limited palette to it and use dithering for the gradients, then enlarge it with nearest-neighbor scaling and save as PNG. How to turn a photo into pixel art covers each step.
Why do people say converted photos aren’t real pixel art? #
Because the strict definition involves placing pixels deliberately, one at a time. A converter makes those choices algorithmically. It’s a reasonable distinction, and it doesn’t stop a conversion from being useful, good-looking or a starting point for hand-editing.
Can pixelation be reversed? #
Sometimes, particularly in video, where differences between blocks across many frames carry information about the original. For anything genuinely sensitive, cover it with a solid shape rather than pixelating it.
What’s the difference between pixelation and pixelization? #
Pixelization is the deliberate technique of showing an image at a much lower resolution. Pixelation is the unwanted visibility of individual pixels, usually from enlarging a small image. Pixilation, with an i, is a stop-motion animation method and unrelated to both.