A Low-Cost, High Precision, High Accuracy Tool to Measure the Latency of Touchscreen Devices
We report on the Latency Hammer, a low-cost yet highaccuracy \ and high-precision automated tool that measures \ the interface latency of touchscreen devices. The Hammer \ directly measures latency by triggering a capacitive touch \ event on a device using an electrically actuated touch \ simulator, and a photo sensor to monitor the screen for a \ visual response. This allows us to measure the full end-toend \ latency of a touchscreen system exactly as it would be \ experienced by a user. The Hammer does not require human \ interaction to perform a measurement, enabling the \ acquisition of large datasets. We present the operating \ principles of the Hammer, and discuss its design and \ construction; full design documents are available online. We \ also present a series of tools and equipment that were built to \ assess and validate the performance of the Hammer, and \ demonstrate that it provides reliable latency measurements.(Deber et al., 2016)
References
2016
CHI
Hammer Time! A Low-Cost, High Precision, High Accuracy Tool to Measure the Latency of Touchscreen Devices
Jonathan Deber, Bruno De Araujo, Ricardo Jota, and 4 more authors
In Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems, San Jose, California, USA, 2016
We report on the Latency Hammer, a low-cost yet highaccuracy and high-precision automated tool that measures the interface latency of touchscreen devices. The Hammer directly measures latency by triggering a capacitive touch event on a device using an electrically actuated touch simulator, and a photo sensor to monitor the screen for a visual response. This allows us to measure the full end-toend latency of a touchscreen system exactly as it would be experienced by a user. The Hammer does not require human interaction to perform a measurement, enabling the acquisition of large datasets. We present the operating principles of the Hammer, and discuss its design and construction; full design documents are available online. We also present a series of tools and equipment that were built to assess and validate the performance of the Hammer, and demonstrate that it provides reliable latency measurements.
