The Hyperspectral Single Pixel Imaging kit ONE-PIX is a hardware add-on to turn a spectrometer into a hyperspectral camera. Single pixel imaging is used to measure hypercubes in the visible region. It can be extended towards the near infrared region for agricultural applications, for instance. This modular kit can be used with different spectrometers. It is an ideal environment for getting started with hyperspectral imaging or single pixel imaging for indoor uses.

The ONE-PIX kit is a tool for teachers and students to discover non conventional imaging. It is also an economic tool to produce low cost hypercubes of tailored scenes or to reproduce academical results within the robotic vision field.
To learn more about single pixel imaging theory used for hyperspectral imaging, you can read our article.

Working principle

The ONE-PIX kit contains a video projector and a fibered spectrometer with superimposed fields of view. Both are connected and controlled by a Raspberry Pi board.

ONE-PIX technology involves projecting a series of patterns onto a scene to be imaged. A spectrometer measures the average reflected spectrum of the scene for each projection. An algorithm then reconstructs the hypercube of the scene from all the spectra measured during the acquisition. The Raspberry Pi board ensures the synchronization between patterns projections and the spectrometer measurements.

For more information about the single pixel imaging you can go here.

An open source kit

This kit was developed with the primary need in mind to be able to be assembled on a standard fablab with laser cutting. Little wiring (all low voltage) and no soldering is required. So, you can  choose to build your own hardware ONE-PIX kit thanks to informations and files available in the hardware build folder on Github. The objective is to provide a space for adoption, dissemination and collaboration within a community of users.
If you assembled a kit by yourself and found some simpliest or smartest way to do it, please share !

We’ve compiled answers to a few frequently asked questions in our ONE-PIX FAQ, which you can consult to find out more.

ONE-PIX presentation video