Description: Raster graphics are images composed of pixels, as opposed to vector graphics, which are based on mathematical formulas to represent images. Each pixel in a raster graphic has a specific color, and when combined, they form a complete image. This representation is ideal for photographs and complex images, where detail and color variations are essential. However, raster graphics have limitations in terms of scalability; when enlarged, they can lose quality and become pixelated. The most common raster graphic formats include JPEG, PNG, and BMP. In the context of graphical systems, raster graphics are fundamental for visual representation on screens, as these systems handle image rendering through these formats. In the realm of 3D rendering, raster graphics are the final output of a process that includes creating 3D models, texturing, and lighting, where the final image is presented as a set of pixels on the screen. Raster graphics technology has evolved significantly, allowing for the creation of high-quality and complex images in various applications, from video games to graphic design and scientific visualization.
History: Raster graphics have their roots in the early computer graphics systems of the 1960s, where pixels were used to represent images on low-resolution screens. With technological advancements, especially in the 1980s, file formats like BMP and GIF were developed, allowing for the creation and storage of raster images. The popularization of personal computers and image editing software in the 1990s, such as Adobe Photoshop, further propelled the use of raster graphics in graphic design and digital photography.
Uses: Raster graphics are widely used in various applications, including digital photography, graphic design, video games, and scientific visualization. They are ideal for representing complex and detailed images, such as portraits and landscapes, where color variation and texture are crucial. Additionally, they are used on the web to display images on sites and applications, as well as in multimedia content creation.
Examples: Examples of raster graphics include digital photographs in JPEG format, logo images in PNG, and video game graphics that use rasterized textures to represent environments and characters. They are also found in image editing applications, where users can manipulate and create raster graphics for various purposes.
