Questions tagged [image-classification]

Question 1

I tried doing LULC Classification using Maximum Likelihood classifier. But after running the code, the classified image shows forest for every pixel. Not only the ROI, but whole world is classified as ...

Question 2

I am trying to gather samples using "draw polygon" tool for supervised classification on my ArcGIS 10.8. Despite enabling the image classification tool, whenever I draw shapes from the ...

Question 3

I'm trying to create random points on my raster image for accuracy assessment (using the Semi-Automated Classification Plugin), but the points won't be imported into the training input file (on the ...

Question 4

After preparing and saving training samples for supervised LULU classification in ArcGIS pro, subsequent edits to class attributes (e.g., correcting mislabeled water body samples under the built-up ...

Question 5

I made some training samples using the Training Samples manager, but didn't have time to draw polygons for one of my classes. I saved the schema to edit later, but the "generate from training ...

Question 6

I'm trying to perform classification in Google Earth Engine using Sentinel-1, Sentinel-2, and SRTM datasets. When using only Sentinel-1, the sampleRegions function works perfectly, but when I add ...

Question 7

I am trying to obtain the mode and the mode frequency per pixel of different iterations of a Random Forest Classifier (With a fixed number of trees but with different random seeds) with 5 classes (0 ...

Question 8

I'm trying to classify a clipped Landsat raster and then do an accuracy check for a watershed. When I do classify my clipped watershed, the region outside the ROI also gets classified i.e. the NoData ...

Question 9

Is it possible to export each image from image collection as an asset? If yes how can I improvise this code? // set cloud threshold var cloud_thresh = 40; // Cloud mask function var ...

Question 10

I am working on an accuracy assessment for my classification and want to do this using random sampling of points from a validation part of my training areas. For this I split the training areas into a ...

Question 11

While doing LULC classification I am facing the following problem in QGIS. I am unable to do the following process. After selecting all the training inputs, I select classification in band-processing ...

Question 12

I came to the issue of Out of Memory Error when I tried to do a supervised classification of an image using a shapefile polygons as underlying featureCollection in GEE. It turned out that some of the ...

Question 13

Without applying a filter function like the mode or similar, I want to apply a sieve to a raster with two classes. Let's say I have a raster with pixel values 0 and 1; I want to remove groups of ...

Question 14

When I run the train images classifier on an orthomosaic or orthophoto by OTB in QGIS it generates me not just a file with .txt extension but by default it starts generating .txt.shp, .txt.shx, .txt....

Question 15

I am trying to apply post-processing (Classification Sieve) in GEE to my classified raster, just as we apply in QGIS (used 4x4) or (8x8). Remove unwanted and noise pepper effects from the ...

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Questions tagged [image-classification]

Maximum Likelihood classifier classifies every pixel as one class only. (in GEE)

Unable to use "Draw polygon" tool to add training samples for supervised classification

SCP Error: WARNING-ROI not found

Training samples not get saved

Save training samples with the training samples manager to be able to edit them later while doing Image Classification in ArcGIS Pro 3.4.0

Using sampleRegions in Google Earth Engine when combining Sentinel-1 and Sentinel-2 datasets

Google Earth Engine Classification Collection Mode Frequency for pixel confidence/stability/agreement

ArcGIS classification and accuracy assessment NoData class and error generating accuracy points

Exporting an image collection as an asset

How to extract random points from a list of polygons in Earth Engine (classification accuracy assessment / "is not a function")?

Error in preview of classification in QGIS

GEE Classification Error Multiple Geometry types

Apply Sieve in Google Earth Engine

Train images classifier not working on orthomosaic GeoTIFF file

How to do post-classification / eliminate isolated pixels in Google Earth Engine

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