Questions tagged [pca]

Use this tag when referring to ODL studio open source software

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Is it possible (and how) to mask NoData values using Scikit-learn PCA?

I have to carry out a Principal Component Analysis (sklearn.decomposition.PCA) on a dataset composed of several images. Some of these images have very large gaps due to the removal of clouds. Is there ...
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15 views

PCA for Sentinel2 SVM and RF classification

I am attempting to classify dump pile in google earth engine. Using Sentinel 2 data and classifying the first 5 PCAs lead to the best visual result. Here the PCA code used in script with Sentinel2. ...
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1answer
74 views

How to use FactoQGIS for Typological Analysis Principal Components Analysis (PCA) for vector features in QGIS?

How to use FactoQGIS for Typological Analysis Principal Components Analysis (PCA) for vector features in QGIS? I have a shapefile of polygons as in the following image: Both visually and as ...
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1answer
149 views

How to mask PCA on Google Earth Engine

I am trying to perform PCA on MODIS imagery. I got my code to run using MODIS (it also worked for Landsat), but when I mask my MODIS collection the PCA fails. This had to do with missing values, as ...
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0answers
17 views

My script in pyqgis run (grass7:I.pca) runs fine but output folder empties [duplicate]

this is my PyQGIS scrpit (QGIS 3.10). this code runs fine but the output folder doesn't show results. the MyFeedBack function shows me that it runs correctly and matches the Registry that is ...
2
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1answer
221 views

How can you use scikit-learn to do PCA on a 9 band raster image?

I would like to do a PCA on a 9band raster image to reduce the total number of inputs bands to 3. However, I'm not able to do it as I don't think I understand what sklearn is doing in its PCA. Some ...
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41 views

Why does running the script not show the file in the output folder correctly? [duplicate]

Why does running the script not show the file in the output folder correctly? The script was run in PyQGIS 3.10. Below find the script used import processing import os path ='...
0
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1answer
347 views

Google Earth Engine Error: When computing PCA of Sentinel -2 Mosaiced Image

I want to select an area using Rectangle or Polygon tool, mosaic Sentinel- 2 images in the selected area using the median() or mosaic() method and calculate PCA of the area. When I use a single image ...
1
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0answers
41 views

How to find data orientation atfer an ICA

I'm trying to cluster tractor sensor data by row in a python script. For the moment I'm trying to find data orientation after a FastICA (sklearn), vertical or horizontal. Because for same data, ...
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2answers
1k views

Where do I find the covariance matrix in Erdas Imagine?

I've just run a principal components analysis on a Landsat image and am trying to calculate my factor loadings. I'm using the textbook Digital Image Processing by John Jenson as a guide and it says ...