Example of 2 Imaging Techniques (image) The Optical Society Caption A small wooden figure of a running man hidden from view is revealed by using two different imaging techniques. In the first, back projection is used to tease out the image from reflected photons of light. In the second, another technique known as sparse reconstruction brings the hidden object into view. Credit Optics Express Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.