Every engineer who develops, installs, or maintains video systems faces the need to measure glass-to-glass latency (the time it takes for a video signal to travel from the camera to the monitor). Glass-to-glass latency is a very important characteristic of video systems and is critical in a number of applications (driver assistance systems, drones, and others). Measuring glass-to-glass latency is quite simple. You need to place a stopwatch with a resolution of 1 millisecond in front of the camera and position the monitor displaying the camera image so that both the monitor and the camera are visible at the same time. Then you need to take a photo of the monitor and the stopwatch in the same frame. The difference in time between the stopwatch and its image on the monitor will show the glass-to-glass latency. As you can see, the experiment is quite simple, but it is difficult to carry out—you need to find the right stopwatch, position the monitor and camera correctly, etc. This is often very difficult to do, especially in the field. At ConstantRobotics, we work with video systems on a daily basis. We measure glass-to-glass latency every day. We couldn't find any ready-made devices on the market. So, to make our lives easier, we developed a simple device for measuring glass-to-glass latency with high accuracy. The video shows an example of how the device works. Link to device page: LINK
As you can see, measuring latency using the device is quite simple. We actively use it in the field when we need to prove to the customer of a video system that its characteristics meet the requirements.
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