Uma biblioteca para o desenvolvimento de aplicações de projeção interativa

Abstract

Since the adoption of the keyboard/monitor pair as the input and output standard device, several new forms of computer interaction have been created. Currently one of the most promising is the interactive projection. With interactive projection, it is possible to display an image and transmit instructions to a computer through hands recognition, objects, touch detection, shadows, gestures, and others. Therewith, it is possible to develop applications to interpret inputs from a camera, or other auxiliary device, as well as display, with the help of a projector, images that are sensitive to these instructions on flat or curved surfaces. Although solutions of this type already exist individually, combining it in order to develop interactive projection applications is still a task that demands a deep algorithm knowledge and writing many lines of code. This paper objective is to easy the development of interactive projection applications, throughout the development of a library which combines various input and output solutions gathered in accessible and easy-to-use functionalities. The developed library is based on resources available in the OpenCV computer vision library. Existing functions have been linked to the algorithms found in the field literature to create new functions directed to interactive projection applications. As result, we obtained a library developed in C ++, which integrates owngenerated resources to the OpenCV in order to simplify interactive projections application development. Finally, as a functionality quality and validity check, we had developed a pilot application. With the use of this library it was possible to build an interactive projection application with a lower amount of code lines and complexity. Therefore, we provided a reduction in programming efforts to integrate a projector to a camera, to capture and image generation commands, respectively, into interactive applications. As future work, we aim to optimize the methods developed to detect the interaction with the projection, as well as the creation of new methods to extend the coverage of the requirements discovered during the bibliographic research.