Image processing
Image processing is the manipulation of an image to change its content, format, or other visual characteristics. Imaging devices such as cameras acquire images that can be displayed or printed, and can be manipulated in many ways to produce final images. Image manipulation consists of two types of processes: image-processing software manipulates images, and computer graphics (CG) software manipulates three-dimensional images.
Image-processing software includes a set of filters and utilities that alter how an image looks. It can be used to correct mistakes in an image, such as eliminating red-eye from a photograph, increasing the sharpness of the image, or painting a special effect over the entire image. The end result of a filter is an image that has more or less of the characteristics that the user wants. This effect is known as postprocessing. The steps a user might perform to achieve a desired result are called postprocessing. Some filters are general-purpose, and others are designed to be used in specific types of situations.
Image-processing software may be difficult to use, or require user expertise to perform. It is especially useful for professionals, such as photographers and artists. Image-processing software is also used in more than image-based industries, such as web graphics, special effects, 3D modeling, and animation.
Computer graphics is the branch of computer graphics that deals with the creation of three-dimensional, realistic images. Computer graphics provides artists, designers, and other professionals with tools to create images that are realistic, realistic, or otherwise unusual. The images are created by specifying geometric objects and painting them with computer-generated three-dimensional models, textures, and lighting.
Computer graphics can be divided into three broad categories:
Physical simulation;
Geometric modeling;
3D painting.
Image processing can be performed by specialized tools or by using general-purpose programs with special image-processing features. The most powerful image-processing software can perform several different types of image-processing tasks. A program that specializes in a single type of processing can be more powerful than a program that does multiple types of processing. The ability to perform multiple types of processing is known as a "multiprocessing" feature.
Common image-processing tasks include:
Image resizing
Image resizing is the conversion of an image to a different size. A photograph taken with a digital camera can be cropped, and the edges of the image can be repositioned and rotated to produce a ac619d1d87
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