Definition

1. Noun:
   • A digital image format: A "bitmap" is a type of computer graphic where an image is composed of a grid of individual picture elements (pixels). Each pixel is assigned a specific color or brightness value, and the complete array of these values forms the image.
   • A data structure for graphics: It refers to the method of storing and representing image data as a map of bits within a computer's memory or a file.

Usage Examples

• Noun:
  • The logo was saved as a simple bitmap, which became pixelated when enlarged.
  • Early computer screens displayed images using a fixed bitmap.
  • The file format .bmp is a common type of bitmap image.

Advanced Usage

• "Bitmap graphics" or "raster graphics": This term is often used to contrast with vector graphics. Bitmap images are resolution-dependent, meaning they can lose quality when scaled.

  • For photographs, bitmap formats like JPEG are typically used, while logos are often created as vector graphics to allow for scaling.

• "Bitmap font": A font where each character is defined by a specific pattern of pixels in a grid.

  • The old video game used a bitmap font that gave it a distinctive retro look.

Variants and Related Words

• Raster image (n): A synonym for a bitmap image, emphasizing the grid (raster) of pixels.
• Pixel map (n): Another term describing the same concept of an image defined by an array of pixels.
• BMP (n): A common filename extension () for bitmap image files.

Synonyms

• Raster graphic: An image constructed from a grid of pixels.
• Pixel image: An image defined by its constituent pixels.

Related Phrases

• Bitmap display: A type of computer monitor or screen technology that directly represents a framebuffer in memory as a bitmap.
  • The advent of bitmap displays allowed for more detailed and flexible graphics.

Notes on Meaning

The term "bitmap" strictly refers to the representation of the image data itself (the array of values). It is distinct from specific file formats (like BMP, PNG, TIFF) which may use a bitmap structure to store the data along with additional compression or metadata. In general usage, "a bitmap" often refers to any image that is pixel-based, as opposed to vector-based.

Noun

1. an image represented as a two dimensional array of brightness values for pixels