Self-correcting portable projector

摘要

Conventional projectors are designed to generate orthogonal projections on the screen. Manual adjustments to the location and the focal distance to receive an optimal projection are done in ad-hoc manner and they are tedious tasks. As such, there is a growing interest in developing projectors with casual placing, which enables to locate the projector in a desired location so that the display will be free from distortions. This research has been conducted to develop a smart projector with built in sensors and related units to generate an optimal display without human intervention. We developed techniques to enable real-time auto correction of projectors using low cost, commodity-off-the-shelf hardware. The proposed system acquire the exact display surface geometry and perspective-corrected imagery to a casually placed projector the without any space restriction. Our system does not require cameras and sensors placed away from the projector and it can be embedded in the projector without changing the physical dimensions of it.