Single Pixel Camera - Compressive Sensing

1. How does a single pixel camera work?
2. What is a single pixel detector?
3. What is single pixel imaging?
4. How does compressed sensing work?

How does a single pixel camera work?

A single pixel camera works by reflecting the image off of a digital micromirror device (DMD) through a lens and onto a photodiode. A DMD is an array of microscopic mirrors which can be individually tilted ±15°.

What is a single pixel detector?

A single-pixel detector is used to collect that light. Different object types, or classes of data, are then assigned to different wavelengths. An automated all-optical classification process classifies the input images, using the output spectrum detected by a single pixel.

What is single pixel imaging?

Single-pixel imaging is an emerging paradigm that allows high-quality images to be provided by a device that is only equipped with a single point detector. Such a device is referred to as a single-pixel camera.

How does compressed sensing work?

Compressed sensing addresses the issue of high scan time by enabling faster acquisition by measuring fewer Fourier coefficients. This produces a high-quality image with relatively lower scan time. Another application (also discussed ahead) is for CT reconstruction with fewer X-ray projections.