Computer vision is concerned with modeling and replicating human vision using computer software and hardware. Formally if we define computer vision then its definition would be that computer vision is a discipline that studies how to reconstruct, interrupt and understand a 3d scene from its 2d images in terms of the properties of the structure present in scene.
It needs knowledge from the following fields in order to understand and stimulate the operation of human vision system.
Computer vision is divided into three basic categories that are as following:
Low-level vision: includes process image for feature extraction.
Intermediate-level vision: includes object recognition and 3D scene Interpretation
High-level vision: includes conceptual description of a scene like activity, intention and behavior.
Computer Vision overlaps significantly with the following fields:
Image Processing: it focuses on image manipulation.
Pattern Recognition: it studies various techniques to classify patterns.
Photogrammetry: it is concerned with obtaining accurate measurements from images.
Image processing studies image to image transformation. The input and output of image processing are both images.
Computer vision is the construction of explicit, meaningful descriptions of physical objects from their image. The output of computer vision is a description or an interpretation of structures in 3D scene.
Computer graphics are graphics created using computers and the representation of image data by a computer specifically with help from specialized graphic hardware and software. Formally we can say that Computer graphics is creation, manipulation and storage of geometric objects (modeling) and their images (Rendering).
The field of computer graphics developed with the emergence of computer graphics hardware. Today computer graphics is use in almost every field. Many powerful tools have been developed to visualize data. Computer graphics field become more popular when companies started using it in video games. Today it is a multibillion dollar industry and main driving force behind the computer graphics development. Some common applications areas are as following: