Understanding how they are different and how to apply each in your projects will empower you to produce a quality print, to optimize digital images for web and ultimately to save yourself valuable time. With that said, let’s deconstruct what these terms mean and get into the differences between PPI and DPI. PPI describes the resolution in pixels of a digital image whereas DPI describes the amount of ink dots on a printed image. Though PPI largely refers to screen display, it also affects the print size of your like television screens, computer monitors and digital design and thus the quality of the output.
DPI, on the other hand, has nothing to do with image manipulation service anything digital and primarily concerns print. PPI resolution — What PPI means PPI, or pixels per inch, refers both to the fixed number of pixels that a screen can display and the density of pixels within a digital image. Pixel count on the other hand refers to the number of pixels across the length and width of a digital image—that is, the image dimensions in pixels. Pixels, or “picture elements”, are the smallest building blocks of a digital image. Zoom in to any image on your and you will see it break up into colored squares—these are pixels.
Made up of RGB subpixels An image demonstrating image dimension by pixel count Pixel count describe an image’s dimensions based on the number of pixels An image demonstrating pixel density PPI, or pixel density, describes the amount of detail in an image based on the concentration of pixels Within pixels are sub-pixels, red, green and blue light elements that the human eye cannot see because additive color processing blends them into a single hue which appears on the pixel level. This is why PPI utilizes the RGB (red, green and blue) color model, also known as the additive color model.