Device, System, and Method of Computer Vision, Object Tracking, Image Analysis, and Trajectory Estimation

A device comprising:

• a first camera and a second camera, co-located and enclosed within a same housing;
• wherein the first camera is aimed along a first aiming vector, wherein the second camera is aimed along a second aiming vector, wherein the first and second aiming vector form an angle in the range of 20 to 120 degrees;
• wherein, upon mounting of said device on or in proximity to an edge of a net of a tennis court, the first camera is to capture images of a first segment of the tennis court, and the second camera is to capture images of a second segment of the tennis court, wherein the first segment and the second segment include at least an overlapping portion that is captured by both the first camera and the second camera, wherein a combination of the first segment and the second segment corresponds to at least 75 percent of an entirety of said tennis court;
• a memory unit to store (i) images captured by the first camera, and (ii) images substantially simultaneously by the second camera;
• a processor executing a computer-vision algorithm that analyzes said images, and detects in said images at least two of:
• (i) a first human player, (ii) a second human player, (iii) a tennis ball, (iv) court lines that define the tennis court.