What type of image is comprised of pixels?

A bitmap image is indeed comprised of pixels. Each pixel represents a single point in the image, with its own color value, forming the whole image when viewed from a distance. This pixel-based structure allows for detailed representations of images, including photographs and complex graphics.

Bitmap images are resolution-dependent, meaning they have a fixed number of pixels per inch. When scaled up, they can lose quality, appearing pixelated or blurry. This contrasts with vector images, which are made up of paths defined by mathematical expressions and can be scaled without any loss in quality. The term "raster image" is often used interchangeably with bitmap, as both refer to pixel-based images. While a 3D image consists of representations in three dimensions, it does not inherently relate to the pixel structure found in bitmap images.