Rene H.J. Heim

7 Questions 18 Answers 0 Followers

Questions related from Rene H.J. Heim

What are the radiometric correction procedures that are applied in Agisoft Metashape?

Dear RG-Community, I have been using Agisoft Metashape for UAV imagery processing for quite a while now. Also a while ago, I stumbled upon the Micasense GitHub repository and saw that individual...

18 July 2024 8,538 2 View

How to sample maize leaves and transporting them for specific leaf area measurements?

Dear RG community, I would like to sample (cut-off) maize leaves in the field and transport them to the lab for SLA (specific leaf area) measurements. After a brief literature review, I could not...

19 August 2020 6,264 4 View

How to find and extract a homogenous (uniform) area of pixel values in an image?

Dear RG Community, I am currently working with thermal images of natural scenes. Throughout the scene I positioned large artificial targets that are painted black, grey and white. I would like...

13 November 2019 3,930 13 View

How is a GCMS object constructed based on a CDF file?

Dear RG Community, I am currently trying to handle CDF files in R (xcms package). These files contain information that was yielded from a GCMS analysis. I start to understand that the...

04 September 2019 4,629 2 View

Always OOB sampling in R caret package when using random forests?

Dear RG-community, I am curious how exactly the training process for a random forest model works when using the caret package in R. For the training process (trainControl()) we got the option to...

29 May 2018 6,752 4 View

How to handle zero offset in spectral reflectance data?

Dear RG-Community, for my PhD, I asked a drone company to capture multispectral imagery from a lemon myrtle plantation. Based on this imagery I defined different vegetation classes (Treated,...

22 May 2018 7,570 1 View

Does anyone know of a function in R to calculate and plot an interval band for mean spectral responses originating from field spectrometry?

I am working with spectral signatures of vegetation in R. I would like to plot various means of those signatures and add an interval band representing the standard error of the mean for each...

27 February 2017 7,918 0 View