To setup the RPi, we need to install the Raspberry Pi OS and connect the RPi to a WiFi network, which can be done without any external display, according to this tutorial.
It is then necessary to setup SSH'ing without a password, as in this tutorial, in order for the remote capture and display scripts provided in the LenslessPiCam GitHub repository.
Building LenslessPiCam
With the RPi and sensor setup, we can proceed to building LenslessPiCam! This tutorial explains how to do just that with the HQ sensor, cardboard, electric tape and doubled sided tape. We really recommend using this type of tape (doubled-sided tape as the lens replacement and electric tape for cropping / holding things together) as we found it gave the best results.
While assembling LenslessPiCam, it will be useful to have a point source to help with creating the aperture (i.e. cropping). In this tutorial, we describe how to build one from an Arduino, a white LED, common electric components, and a cardboard box. A point source will also be needed to perform imaging.
Performing imaging
This is the part when we take pictures.
This tutorial describes how to take measurements with LenslessPiCam, using scripts from the GitHub repository.
In this tutorial, we describe in more detail how to digitally reconstruct an image from the raw measurements. We also suggest some extension / exercises that can be done.
If you are an instructor and would like the solutions, you can request access here or send an email to eric[dot]bezzam[at]epfl[dot]ch.
Evaluating the reconstructions
In the repository, we provide a script to remotely display pictures on an external monitor.
This can be useful for creating a small dataset to evaluate different reconstruction techniques.
In this tutorial, we present different metrics that can be used for evaluating reconstructions, and present a dataset that can be used for evaluating different reconstruction strategies.
(1) HQ camera connected to a Raspberry Pi. (2) Tape-constructed lensless camera. (3) Point-spread function (PSF) measurement setup. (4) Example reconstructions. Images by E.Bezzam (LCAV).
