mozgásvektorok

Mozgásvektorok, or motion vectors, are a fundamental concept in computer graphics and video processing used to describe the displacement of an object or a set of pixels between two consecutive frames. In essence, a motion vector quantifies how much a particular point or region has moved and in which direction over a short period of time.

These vectors are typically represented as a two-dimensional (for 2D motion) or three-dimensional (for 3D motion) quantity, containing both magnitude and direction. The magnitude indicates the distance of the movement, while the direction specifies the path taken. For example, a motion vector might indicate that a pixel moved 5 pixels to the right and 2 pixels down.

The primary application of motion vectors is in video compression. By identifying and encoding the motion between frames, redundant information can be significantly reduced. Instead of storing each frame independently, video codecs store a reference frame and then only encode the motion vectors and the differences from the predicted position. This allows for more efficient storage and transmission of video data.

Beyond compression, motion vectors are also used in motion estimation, object tracking, and image stabilization. In computer vision, they help in understanding the dynamics of a scene. Algorithms are developed to accurately estimate these vectors, which is crucial for the performance of applications relying on motion analysis. The accuracy of motion vector estimation directly impacts the quality of video compression and the effectiveness of tracking and analysis tasks.