Abstract: A video analysis device includes a camera control unit, an image analysis unit, a tracking determination unit, and an analysis camera selection unit. The tracking determination unit is configured to calculate or acquire, from analyzed information, a moving speed of a tracked person to be tracked. The analysis camera selection unit is configured to set a camera search range based on the moving speed, and select a camera present in the camera search range as an analysis target camera for next video analysis. In addition, the camera control unit is configured to transmit, to the image analysis unit, a video of only the analysis target camera selected by the analysis camera selection unit.

Abstract: A dot printing device comprises a printing head including a plurality of needle lines each formed of a plurality of printing needles arranged at a predetermined pitch in a vertical direction, a control circuit for driving the needle lines, and a moving mechanism for moving said printing head in a horizontal direction, thereby allowing the printing head to perform a printing operation. In the dot printing device, the plurality of needle lines are first, second and third needle lines, each printing needle of the second needle line being positioned at an equal height to a corresponding needle of the first needle line in the vertical direction, and each printing needle of the third needle line being positioned at a different height from a corresponding printing needle of the first needle line in the vertical direction by a distance which is half of the predetermined pitch.