Images are ubiquitous in our lives and are a fundamental and indispensable medium for the dissemination of information. Imaging is a direct means of acquiring images and can be classified according to the different imaging wavelengths as visible, radar, infrared, and terahertz imaging. With the further development of information technology, new demands are being placed on spatial resolution, signal-to-noise ratio, multispectral imaging performance, and the imaging environment.
Single-pixel Imaging Technology
With the increase in computer arithmetic power and the development of compressed perception theory, scientists have proposed a single-pixel imaging technique based on a computational imaging approach. This is a new imaging method that uses a single-pixel detector without spatial resolution and a spatial light modulator to obtain images by reconstruction. Compared with the traditional array detector imaging method, single-pixel imaging has the advantages of high sensitivity and interference resistance and has obvious advantages in the fields of very weak light imaging, non-local imaging, special band detection without large surface array detectors, etc. It has very broad application prospects in many fields such as nuclear magnetic resonance, aerospace remote sensing, and terahertz imaging.
Advantages of Single-pixel Imaging
Image Credits: High throughput dual-wavelength temperature distribution imaging via compressive imaging.Opt. Comm. 410, 287-291 (2018)
Single Pixel Photon Imaging Teaching Instrument
Although computational imaging, represented by single-pixel photon imaging, is promising, there is still a lack of experimental teaching content at the undergraduate level. In order to improve the relevant curriculum and help students develop their scientific research skills, CIQTEK, in collaboration with Professor Qing Zhao's team from the Quantum Technology Research Centre of Beijing University of Technology, has created a single-pixel photon imaging teaching instrument.
The product is a teaching instrument based on the theory of compressed perception and photon counting imaging technology, using digital micromirror devices to accomplish rapid imaging of random spatial light-modulated target objects. The product takes advantage of the sparse signal characteristics of the compressed sensing technique to go beyond the traditional Shannon sampling theorem and can restore images with high spatial resolution and high signal-to-noise ratio in very low light conditions with fewer measurements.
CIQTEK Launched Single Pixel Photon Imaging Teaching Instrument
The single-pixel photon imaging teaching instrument has a wealth of hardware modules to support students' hands-on adjustment and construction, facilitating students' understanding of spatial light modulation techniques and equipment usage, understanding the principle of compressed perception and imaging methods, and knowing the characteristics of photon counting imaging and noise handling methods.
At the same time, CIQTEK equips its products with complete teaching handouts and experimental content on the theory of compressed perception, helping universities to offer courses in experimental courses in modern physics, communication classes, computational mathematics, and other directions.
- Instrument Adjustment Experiment
- Single Pixel Photon Imaging Experiment
- Experimental Single Pixel Photon Imaging Modulation Method
Comparison of imaging at different flip frequencies of 50Hz, 100Hz and 200Hz
Comparison of imaging with different algorithms for BP, OMP, and TVAL3