Alpha (Alpha Channel)

The alpha channel is a component of digital images that controls transparency. Think of it as a mask that determines how see-through or opaque each part of an image is. For example, in graphics or photos, a fully transparent area allows the background to show through, while an opaque area completely blocks it. Alpha channels are essential in creating smooth compositing, overlays, and special effects, allowing images to blend seamlessly with their surroundings. They are commonly used in video editing, graphic design, and website backgrounds to achieve polished, layered visuals.