An Approach to Raspberry Pi Synchronization in a Multimedia Projection System for Applications in Presentation of Historical and Cultural Heritage
DOI:
https://doi.org/10.55630/dipp.2015.5.23Keywords:
Raspberry Pi, multimedia projection systems, Pepper’s Ghost, GPIO communication and synchronizationAbstract
This paper discusses an implementation of a multimedia projection system with two synchronized video sources, based on the Raspberry Pi single board computer systems. The system is primarily intended for various projections in presentation of historical and cultural heritage, although it can be used for many other related purposes. The considered multimedia system has two projection surfaces - a horizontal projection plane and a 45° inclined special glass projection plane which creates the hologramlike Pepper’s Ghost effect. Each plane displays a separate high-definition video obtained from the corresponding Raspberry Pi. Synchronization of presentations is achieved using cu stom connection throu gh the general purpose input/output (GPIO) connector of the Raspberry Pi and the wiringPi interface library. As valuable aspects of the system, we can point out the following. From the practical point of view, the system has low cost due to the use of Rasp berry Pis. Generation of a holograp hic effect, as well as larger flexibility in creating the contents of the presentations due to the two projection surfaces, are additional attractive features.References
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