Definition and scope of computer vision

Summary

Computer vision is an interdisciplinary field that studies how computers can gain high-level understanding from digital images or videos. From an engineering perspective, it aims to automate tasks that the human visual system can perform, by extracting, analyzing, and understanding useful information from one image or a sequence of images. “Understanding” here means transforming visual data into meaningful world descriptions that can support reasoning and appropriate actions. The scope of computer vision spans both scientific and technological directions. Scientifically, it focuses on the theory behind artificial systems that extract information from images, while technologically it applies those theories and models to build working computer vision systems. Image data can come in many forms—such as video streams, multi-camera views, 3D scanner outputs, LiDAR point clouds, and medical scans—so the field covers a broad range of sensing and representation types. Typical subdisciplines and tasks include scene reconstruction, object and event detection, activity recognition, video tracking, 3D pose estimation, learning and indexing, motion estimation, visual servoing, 3D scene modeling, and image restoration.

Key Points

• 1

  Computer vision focuses on extracting, analyzing, and understanding useful information from images or video sequences so systems can reason and act.

• 2

  The field includes both theoretical (scientific) foundations and practical (technological) system-building, using many kinds of image data such as video, multi-view imagery, and 3D sensor outputs.

• 3

  Computer vision encompasses a wide range of tasks and subdisciplines, including recognition, motion analysis, scene reconstruction, and image restoration.