Low-cost Fourier ghost imaging using a photoresistor
Computational ghost imaging is a novel way of digital imaging using a single photodetector by obtaining spatial correlations between a scene and a structured pattern illuminating it. In most cases, spatial light modulators (SLMs) and high-quality photodiodes used to do ghost imaging are quite expensive, therefore, limiting its implementation in undergraduate and even graduate optics experiments. Here, we present a cost-effective and easy-to-build ghost imaging setup that addresses this issue by employing a commercial projector and a light-dependent resistor. These are much cheaper and easy-to-find optical instruments. Furthermore, an Arduino-based system is built to automate data gathering and Fourier ghost imaging was used to process the data. Our initial results show that we can have good reconstruction of the object even with the use of low-cost devices.