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Infragram Point & Shoot
question:infragram-point-shoot

The Infragram Point & Shoot is a handheld, battery powered mini camera (a modified Mobius Action Cam) for doing plant analysis. We [modify these](https://publiclab.org/notes/warren/10-19-2017/install-a-filter-or-change-the-lens-in-a-mobius-action-cam) to replace the infrared-blocking filter with a red filter, effectively exchanging its blue light channel for infrared light. (_Lead image by @mathew_) This is based on a great deal of [research by Public Lab contributors](http://publiclab.org/tag/infragram) and was initially pioneered in our community by @nedhorning and @cfastie. See especially [these](http://publiclab.org/notes/cfastie/04-22-2014/mobius-ir-conversion) [two](http://publiclab.org/notes/cfastie/04-18-2014/mobius-filter-o-matic) research notes. Also see [this page](/wiki/raspberry-pi-infragram) for how to do this with a [Raspberry Pi camera](/wiki/pi-camera). ## Why Vineyards, large farms, and NASA all use [near-infrared photography](http://publiclab.org/wiki/near-infrared-camera) for assessing plant health, usually by mounting expensive sensors on airplanes and satellites. At Public Lab, we've developed a Do-It-Yourself way to take these kinds of photos, enabling us to monitor our environment through quantifiable data. [Read more about the Infragram project here](/wiki/infragram). [![5412520298_93873f36d0_o.png](https://i.publiclab.org/system/images/photos/000/005/386/medium/5412520298_93873f36d0_o.png)](https://i.publiclab.org/system/images/photos/000/005/386/original/5412520298_93873f36d0_o.png) Our technique uses a modified digital camera to capture near-infrared and red light in the same image, but in **different color channels**. We then post-process the image (see Infragram.org, below) to attempt to infer how much plants are photosynthesizing. This allows us to better understand and quantify how much of the available light plants are using to produce sugar via photosynthesis. ### Basics Before you begin, to take useful plant analysis photos, **you'll have to modify your camera's white balance**, so that vegetation looks "bluish" but there is not an overall red tinge to the images. You can achieve this with a custom config file, as described below. Some cameras may require a firmware upgrade to v1.20. If you've gotten your Infragram Point & Shoot from the [Public Lab store](http://store.publiclab.org), both the config file and the v1.20 firmware should be on the SD card provided. However, you'll still have to load up the white balance configuration as described in the Activities section below. [![Infragram_Parts.jpg](https://publiclab.org/system/images/photos/000/022/006/large/Infragram_Parts.jpg)](https://publiclab.org/system/images/photos/000/022/006/original/Infragram_Parts.jpg) (_above image by @abdul_) ## Activities [activities:infragram-point-shoot] **** ## Questions These are questions just for the Infragram Point & Shoot, also known as the Mobius Action Cam. For questions about infrared imaging or the Infragram project more broadly, see [the Infragram page](/wiki/infragram#Questions). [questions:infragram-point-shoot] For any information, support, or troubleshooting not covered here, please look to [this epic thread about the Mobius Action Cam at RCGroups.com](http://www.rcgroups.com/forums/showthread.php?t=1904559) which contains a great deal of information about using and modifying the camera. **** ## Upgrades Done something cool with your Mobius? Added to it or improved on it? Post your upgrade guides here: [upgrades:infragram-point-shoot] **** ### Software There is a variety of software available to process your images to calculate [NDVI](/wiki/ndvi) and better understand or compare plant health. See [Infrared software](/wiki/infrared-software) for options. To get started quickly, see our guide on [Getting started with Infragram.org](https://publiclab.org/notes/warren/10-20-2017/getting-started-with-infrared-photography-on-infragram-org). **** ### White balance One step you need to take to set up this camera is to configure the **white balance**; otherwise, your images will be flooded with infrared and will look pinkish -- and the NDVI post-processing steps (see above) won't work. To set the white balance on your Mobius, follow the steps in this activity: https://publiclab.org/notes/warren/10-23-2017/change-the-white-balance-or-other-configuration-on-a-mobius-camera Images should look roughly like the "GOOD" example below -- vegetation should appear generally pastel blue. An incorrectly white-balanced image such as the "BAD" example below may appear with an overall reddish tint. This means the camera probably has not accepted your config file, possibly due to misformatting or incorrect uploading. [![good-bad.png](https://i.publiclab.org/system/images/photos/000/005/383/medium/good-bad.png)](https://i.publiclab.org/system/images/photos/000/005/383/original/good-bad.png) For more on white balance, see: > [Infrablue white balance](/wiki/infrablue-white-balance) **** ### Resources Kit insert: infragram-ps-insert.pdf timelapse.svg modes.svg An official manual for the Mobius Action Cam can also be found here: https://www.mobius-actioncam.com/downloads-info// ...


Author Comment Last activity Moderation
Muneeswaran "Thank you so much @warren @cfastie ! @cfastie I am using mobius actioncam. So I am using modified mobius camera from public lab. i have read some ..." | Read more » about 3 years ago
cfastie "@warren is correct that some synthetic materials reflect a lot of NIR and not much red, so NDVI computes to a high value (NIR-red will be similar t..." | Read more » about 3 years ago
warren "Ah, well, the NDVI algorithm only compares infrared and visible light, so there are plenty of materials that have high NDVI values, but aren't prod..." | Read more » about 3 years ago
Muneeswaran "@Warren Thanks for the quick reply. A person under the tree and the rooftops also falsely classified. How to reduce the noise? Is there a way to im..." | Read more » about 3 years ago
warren "I think this is appropriate for red-filtered #Infragram imaging -- if you upload to https://publiclab.github.io/infragram/, you get: Is that wha..." | Read more » about 3 years ago
harshchouhan002226 "Hello to all, it’s genuinely a nice for me to go to see this web site, it contains precious Information. Happy Birthday Images Happy Birthd..." | Read more » about 3 years ago
Monoxyde "Of course !  good luck boy! -- Luca Salvoni Il giorno mer 17 apr 2019 alle 16:44 \<notifications@publiclab.org> ha scritto: Use of image ..." | Read more » over 3 years ago
warren "Hi! I created that image (with input from many others at https://publiclab.org/contributors/ndvi and https://publiclab.org/contributors/infragram) ..." | Read more » over 3 years ago
warren "Hi, very late reply but I'm starting to tie everything in this topic area together -- there's now documentation up at both https://publiclab.org/wi..." | Read more » almost 5 years ago
warren "Note: we now have a guide to setting white balance, although this question still stands for what the settings should actually be. https://publicla..." | Read more » almost 5 years ago
warren "Awesome, i added this info to the new activities on configuring Mobius cams: https://publiclab.org/wiki/infragram-point-shoot#Activities Thanks!!! " | Read more » almost 5 years ago
suman "I have recently bought Mobius Action Camera - Factory Modified Infrared from Public Lab store.....i have a DJI phantom 3 professional version..i ha..." | Read more » over 5 years ago
cfastie "Mario, After the internal filter has been removed, a new filter can be used either inside the camera or in front of the lens. It's hard to keep the..." | Read more » almost 6 years ago
marfisistemidroni "Where can I send pictures? " | Read more » almost 6 years ago
marfisistemidroni "Hi Chris, thanks for the reply. The kit "DIY Plant Analysis Filter Kit" consists of a red and a blue gelatin. Yes, I want to change the Phantom cam..." | Read more » almost 6 years ago
cfastie "I need some help with your questions. What is the name of the product you bought from Public Lab? Do you want to modify the camera on your DJI Pha..." | Read more » almost 6 years ago
cfastie "I have one of the first Mobius cameras that Public Lab bought to test. It has the standard lens. I removed the IR cut filter (note) and then after ..." | Read more » almost 6 years ago
abdul "Thanks Chris. I'll try adjusting the white balance a bit, and then posting a research note about it. I'll tag you in it. Do you have one of our new..." | Read more » almost 6 years ago
cfastie "Abdul, It is possible that the new lens has different coatings which alter the color balance (red:NIR). This might require an adjustment to the cus..." | Read more » almost 6 years ago
abdul "@warren @cfastie So I took a new photograph with the adjusted config file, as I had indeed uploaded the wrong one. The photo looks like this when..." | Read more » almost 6 years ago
warren "Abdul - it looks like the config file you're using is not set up with a corrected white balance. This page has the corrected WB required as Chris ..." | Read more » almost 6 years ago
cfastie "Abdul, You are correct that all of the things you list could be responsible for the failure to produce a meaningful NDVI image. It could also be du..." | Read more » almost 6 years ago
cfastie "Yes, the config file goes on the SD card. NDVI is based on the proportion of red to NIR light reflected from leaves. That proportion depends in pa..." | Read more » about 6 years ago
mathew "@abdul want to followup? " | Read more » about 6 years ago