Detection of Non-Stationary Photometric Perturbations on Projection Screens

TL;DR

This paper presents a real-time computer vision method for detecting non-stationary photometric disturbances on projection screens, robust against spatial light variations and stationary perturbations, validated through experiments.

Contribution

It introduces a local, real-time detection technique for non-stationary photometric perturbations that is robust to spatial and stationary variations, validated by experimental results.

Findings

Method effectively detects non-stationary perturbations in real-time

Robust against spatial intensity variations and stationary disturbances

Experimental validation confirms reliability of the approach

Abstract

Interfaces based on projection screens have become increasingly more popular in recent years, mainly due to the large screen size and resolution that they provide, as well as their stereo-vision capabilities. This work shows a local method for real-time detection of non-stationary photometric perturbations in projected images by means of computer vision techniques. The method is based on the computation of differences between the images in the projector's frame buffer and the corresponding images on the projection screen observed by the camera. It is robust under spatial variations in the intensity of light emitted by the projector on the projection surface and also robust under stationary photometric perturbations caused by external factors. Moreover, we describe the experiments carried out to show the reliability of the method.