What is the fundamental unit of a digital image, typically a tiny square or dot that contains a single point of color?

What is the fundamental unit of a digital image, typically a tiny square or dot that contains a single point of color?

• A. Image
• B. RGB
• C. Pixel
• D. Metadata

Answer: (C)

Digital images are built from tiny picture elements called pixels. Each pixel is the smallest unit that holds color information for a single point in the image, so when you view the whole picture you’re looking at many of these colored dots arranged in a grid. The term pixel comes from picture element, highlighting that it’s the basic building block of an image. The color data for a pixel is often described using channels like red, green, and blue (the RGB model), but that doesn’t make the unit any bigger—it just describes how that pixel’s color is represented. An image, then, is the entire set of pixels, while metadata refers to information about the image (such as resolution or file type), not the color data of the individual units.

Digital images are built from tiny picture elements called pixels. Each pixel is the smallest unit that holds color information for a single point in the image, so when you view the whole picture you’re looking at many of these colored dots arranged in a grid. The term pixel comes from picture element, highlighting that it’s the basic building block of an image. The color data for a pixel is often described using channels like red, green, and blue (the RGB model), but that doesn’t make the unit any bigger—it just describes how that pixel’s color is represented. An image, then, is the entire set of pixels, while metadata refers to information about the image (such as resolution or file type), not the color data of the individual units.