Single-Pixel Camera Challenges Consumer Misconceptions
An optics research group challenge the myth that more pixels means better quality.
- 17 february 2011
When shopping for digital cameras, consumers often associate a higher number of megapixels with better image quality, a common misconception that the Optics Research Group (GROC) at Universitat Jaume I challenge in a recent project. The experiment featured a single-pixel sensor that was able to record high quality images despite the obvious limitations. Gizmag reports:
The new single-pixel sensor developed by the UJI team goes against this common belief using a technique dubbed ‘ghost imaging’, which is based on the sequential recording of the light intensity transmitted or reflected by an object illuminated by a series of noisy light beams. This noisy light is what we observe, for example, when a piece of paper is illuminated using a laser pointer. To generate the necessary noisy light beams, the device uses a small one-inch LCD screen whose properties and features can be modified using a computer. The LCD screen is similar to home video projectors, but in miniature.
Using the single-pixel camera, the GROC team has successfully captured 2D object images such as the UJI logo and the face of one of the maids of honor from Picasso’s 1957 reinterpretation of the famous Las Meninas painting.