Articles

Integrating image capture and processing with 3rd party processes (or… how to build your own Caviconsole GUI!)

By Chris Lucani - February 6, 2019

The latest version of CaviCapture – the command line python script that orchestrates image capture and light control on the raspberry pi – is significantly different from V1, and not only includes a new script for automatically processing the images (CaviProcess.py) (for more info see https://github.com/OpenSourceOV/cavicapture) but also simplifies configuration and is geared for integrating into other systems/processes,…

Remotely transferring images from the Pi

By Chris Lucani - January 2, 2019

Instead of transferring captured images from the Pi using a USB stick it’s far more efficient to remotely transfer them over a network connection. First, make sure your Pi and the computer you want to transfer the files to (the local computer) are connected to the same network. Most mobile phones have a ‘Mobile Hotspot’…

Uninterrupted power supply for the RaspberryPi setup using a battery and power converter

By Markus Nolf - June 25, 2017

As part of an Australia-wide research project, we frequently take our optical setup to remote field stations where continuous power supply isn’t always guaranteed. To cope with the occasional power outage, we are now powering our RaspberryPis through a 12V battery block using an UBEC switching power converter. The battery itself is trickle-charged from a…

New hand-lens clamp for stem and leaves nearly ready!

By Chris Lucani - May 4, 2017

We’ve been very excited testing a new 3D printed clamp that allows you to fit any (most?) standard hand lens to use as the magnifier. Although the Moment lens used in the standard clamp provides an excellent image, it only provides 10x magnification which we’re finding is just not quite enough for most stems. With…

Sample selection and preparation

By Chris Lucani - April 18, 2017

The optical method, as the name suggests, is a technique that relies heavily on optics to identify the visible changes that accompany drought stress in plants. These changes occur because light interacts differently with xylem that is water-filled vs air-filled, resulting in a subtle change in brightness that can be captured using a camera or…

Creating animated GIFs using ImageJ

By Chris Lucani - April 12, 2017

There are a number of ways of creating animated GIFs for upload to the OpenSourceOV gallery. Aside from online tools such as http://gifmaker.me/ there are also desktop applications like GIF Toaster for mac or GIF Maker for windows, as well as Adobe Photoshop, but the easiest way is to use ImageJ which you’ll already have installed for processing…

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Sample selection and preparation