What are raster graphics?

Raster Graphics are digital images represented by a nut or pixel grid that are commonly called bitmap. Each pixel or dot shows a unique color and all these color dots together create a picture. Each pixel in bitmap is stored as one or more bits in the computer memory. Raster graphics with a larger number of colors and pixels will require more bits and take more memory. Typical file formats for raster graphics include .jpg, .gif, .tiff and .BMP.

Because raster graphics are represented in the structure of the grid, width and height are usually marked with the number of rows and columns rather than a specific unit of measurement. The size of the image can be described as 640 x 480, which means that there are 640 pixels and 480 pixels in the column. The resolution or degree of sharpness present in the figure is calculated by determining the number of pixels per thumb (ppi) or dots on the thumb (DPI). Raster graphics with higher resolution will have smaller pixels, which results in a murrent image of ore. If there are threeBA show or printed raster graphics in larger sizes, it is useful to use a higher resolution so that the image does not seem granched.

black and white raster graphics contain only black and white pixels and each pixel requires only one bit in memory. Color raster graphics require additional bits, because three values ​​are necessary to represent each of the red, green and blue components of pixel. The color depth for the image is represented by the number of bits per pixel and as the color depth increases, more colors are available to display. The 8 -bit color depth image would have 256 different colors available compared to a 12 -bit color image that would allow 4,096 colors. Graphics with increased color depth is more adept when shading is displayed.

Raster Graphics is just one of the two common graphics types are 2-D pictures. Vector graphics with glassIt grows from points and paths and mathematical relationships that connect them to create an image. Vector graphics are infinitely scalable, while raster graphics depend on resolution and size changes affect vulnerable visual image quality. Vector graphics are often used for illustrations of work type and line, while raster graphics are best suited for photos and images with continuous tones and shading.