Raster images are commonly called

While bitmap is the most widely recognized general term for a raster image, technically, both terms describe how a raster image is stored in memory based on its color depth:

• Bitmap (Bit Map): In a strict technical sense, a true bitmap uses only 1 bit per pixel, meaning each pixel can only be one of two colors (usually black or white).

• Pixmap (Pixel Map): A pixmap maps multiple bits per pixel, allowing the image to display a wide range of colors or grayscale shades.