Bitmap
A bitmap is a type of image file format that represents a digital image as a grid of individual pixels. Each pixel in the bitmap corresponds to a specific color, allowing for the detailed representation of images.
Characteristics
– Pixel-based: Bitmap images are made up of a fixed number of pixels, which means that scaling them up can lead to a loss of quality (pixelation).
– Resolution-dependent: The quality of a bitmap image is determined by its resolution, which is the number of pixels per inch (PPI).
– File size: Bitmap files can be large, especially at high resolutions, because they store color information for each individual pixel.
– Color depth: Bitmaps can support various color depths, which determine how many colors can be displayed in the image (e.g., 8-bit, 24-bit).
Examples
– PNG (Portable Network Graphics): A bitmap format that supports lossless compression and transparency.
– JPEG (Joint Photographic Experts Group): A commonly used bitmap format that uses lossy compression, suitable for photographs.
– BMP (Bitmap Image File): A simple bitmap format that stores pixel data without compression, resulting in large file sizes.
