A Pixel is a color element defined by color and tone.
![](https://rudinec.com/wp-content/uploads/2022/04/Pixel.png)
PPI (pixels per inch) is commonly referred to as dots per inch (DPI) when talking about a digital image.
![](https://rudinec.com/wp-content/uploads/2022/04/PPI.png)
DPI (dots per inch) is a carryover from the printing industry putting CMYK (cyan, magenta, yellow, black) dots on paper to represent a color.
![](https://rudinec.com/wp-content/uploads/2022/04/DPI.png)