At Petiole we got many requests about a feature to measure chlorophyll content in leaves using smartphone with Petiole. Hence, now we are working on this idea and hope to bring a new product soon.
Would you like to be among the early adaptors and get news about Petiole chlorophyll measurement when this solution will be ready? Leave us your email and we will send you updates as soon as they come.
Measure leaf area manually at your lab or in a field. Manage each leaf area measurement to find total leaf area and specific leaf area (SLA) without Internet and equipment.
Measure specific leaf area faster to make swifter decisions. Petiole gives you information how to calculate leaf area so you can interpret it quickly and act on.
Forget about plant leaf area meter and ImageJ. Or other leaf area measurement software. Petiole makes leaf area calculation and saves your time and finance.
Hrytsak, L. R., Herts, A. I., Nuzhyna, N. V., Cryk, M. M., Shevchenko, V. V., & Drobyk, N. M. (2018).
The influence of light regime on the growth data and pigment composition of the plant Gentiana lutea cultured in vitro.
Regulatory Mechanisms in Biosystems, 9(2), 258-266.https://doi.org/https://doi.org/10.15421/021838
Step 1. Download a mobile application Petiole into your smartphone
Step 2. Launch this mobile application
Step 3. Calibrate a camera of your smartphone
Step 4. Put a leaf (or leaves) in front of a camera
Step 5. Point to the leaf and look at leaf area calculation in the screen.
Step 6 (optional). Add the data of specific leaf measurement into leaf area count to calculate total leaf area.
Take a quick look at this 1-minute video and you will see all of these steps.
To solve your problem with camera calibration you can try the following steps:
Finally, we have produced four videos about every step of the calibration. Hopefully, this process becomes more clearer with them:
Step 1 - https://www.youtube.com/watch?v=-uU0kiObalw
Step 2 - https://www.youtube.com/watch?v=aHCWkfx80us
Step 3 - https://www.youtube.com/watch?v=m-bGrPqMZQs
Step 4 - https://www.youtube.com/watch?v=K17dcQnD5Xg
We have different measuring stands for each calibration pad depending on the size of leaves you plan to measure: stand no. 5 (for the smallest leaves), stand no. 7 and stand no. 10 (for middle-size leaves), stand no. 15 (for the largest leaves)
The calculated cost for stand no. 5 is $40 without shipping costs. Other stands are still on the Research & Development stage.
If the price is not affordable for you, there is another option: you can use DIY stands, suggested by our users.
Also, we can send you .CAD files of the stand that we are selling, so you can print the stand on 3D printer by yourself.
At this moment we are not selling calibration pads but you can find Petiole.Pad in the links provided below, and do it by yourself. We have 4 different pads depending on (a) different distances between a leaf and camera and (b) variety of leaves sizes.
Print any of the calibration pads on A4 card paper, cut with scissors and it is ready for use.For correct and fast leaf area measurement choose appropriate calibration pad depending on a leaf size:
Before starting her work on Petiole, Maryna has got extensive legal experience as an assistant of the MP at Verkhovna Rada of Ukraine and also worked at local branch of AXA Insurance as well as Antimonopoly Committee of Ukraine.
Maryna has Ph.D in Business Law (2015) at Taras Shevchenko Kyiv National University, LL.M with Merit in International Commercial Law (2012) at London Metropolitan University and Master’s Degree with Honours in Law (2007) at Igor Sikorsky Kyiv Polytechnic Institute in Ukraine.
She contributes her free time to promote Ukrainian literature using technologies at her Literary Agency.
His talent in digital technologies has been recognized with the Endorsement of Tech Nation as a Tier 1 Exceptional Talent Visa holder. Now Andrii is Tech Nation Visa Ambassador.
Prior to founding Petiole, Andrii has worked on different software development and design projects at international tech companies in Ukraine, USA and United Kingdom.
He earned his Master's Degree with Honours in Geographic Information System (2008) at Donetsk National University in Ukraine.
In spare time Andrii is interested in robotics and palaeontology.