"Pixel-based" refers to a method of representing images using tiny squares called pixels. Each pixel contains color information, and when combined, they create a complete image. This approach is commonly used in digital photography, computer graphics, and video games, where images are displayed on screens. In pixel-based graphics, the resolution is determined by the number of pixels in an image. Higher resolution means more pixels, resulting in clearer and more detailed images. Common formats for pixel-based images include JPEG, PNG, and GIF, which are widely used for sharing and displaying images online.