search for: hyperspectr

...ive topics. The successful candidate should hold a master/diploma in Earth Sciences or Physics. He/she has strong computational skills (C, R, IDL) and remote sensing experience. The responsibilities of the post will involve i) successfully combine remote sensing data of different sensor types (hyperspectral and radar), ii) derive robustly bio-physical plant variables, iii) up-scaling of remote sensing products via radiative transfer and/or eco-physiological models. Basic statistical and/or knowledge of plant physiology are of a strong advantage. Working language will be English. Best regards,...

Hi, I'm Pina and I'm a student in geology. I'm working with spectral profile of sand and I have to find the similarity between one spectral profile selected by hyperspectral image anche one that I created to mix different percentage of 4 mineral component. I have to find the best mix of percentage of this 4 mineral in order to have the best likeness with the spectral profile chose by hyperspectral image. Untill now I worked with excel using the function equation solv...

Hi, I work with hyperspectral remote sensing data and I try to built a pls model with this data. I already built the model but if I try to calculate the RMSEP and R2 with a test data set I get the following error message: Error: variable 'subX' was fitted with type "nmatrix.501" but type "nmatrix.7...

Hi, I'm Pina and I'm a student in geology. I'm working with spectral profile of sand and I have to find the similarity between one spectral profile selected by hyperspectral image anche one that I created to mix different percentage of 4 mineral component. I have to find the best mix of percentage of this 4 mineral in order to have the best likeness with the spectral profile chose by hyperspectral image. Untill now I worked with excel using the function equation solv...

hsdar is back on CRAN We are very happy to announce that a new version of the hsdar-package (hyperspectral data analysis in R) is available on CRAN. The introductory vignette is available here: https://cran.r-project.org/web/packages/hsdar/vignettes/Hsdar-intro.pdf The main class "Speclib" has been changed in that the additional information is now stored in the SI slot (function "S...

Hey all, I need some help with a cross validation. I'm new with R and as well with statistics. I had a group work to create a tool for remote sensing class that extracts the best bands of hyperspectral satellite images that describe vegetation. Its a regression between a linear function of using a normalized differenced index (i-j)/(i+j) while i and j are the bands (in the data these are the columns, expect the last column) and the ground truth data which is listed in the last column in %. We d...