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Questions tagged [image-classification]

Image classification refers to the task of extracting information classes from a multiband raster image.

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Reviewing IDL code for performance?

I made a program in IDL for performing a minimum distance classification on multispectral satellite data. This is what my main function looks like function minimum_distance, stack, exercising_data ...
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Calculate distance between multiple arrays and landsat bands in IDL

I have a set of landsat 7 layers, that look like this: files = [ $ "D:\ArcGIS\Programmieren in IDL\Landsat Daten\landsat_b1.tif" $ ,"D:\ArcGIS\Programmieren in IDL\Landsat Daten\landsat_b2.tif" $ ...
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51 views

How to obtain percentiles of classes in classified image in Google Earth Engine?

https://code.earthengine.google.com/e430e2a79aecb65e3efbce23779a0abc I have written this code for supervised classification using the cart classifier. Now I want to extract the no. of pixels in each ...
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56 views

Performing Supervised Classification of Houses in Africa using ArcMap?

I am doing a supervised classification in ArcMap to classify land cover types in a study area in Africa. I am using RapidEye satellite imagery (Planet Labs) and they have 5 bands: blue, green, red, ...
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Unsupervised classification in ERDAS imagine

I am trying to make a classification to run some index ( like NDVI) to see the change over time using the image difference function. Is it possible to do an unsupervised classification on one image ...
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Supervised classification with only one class with Google Earth Engine

I am a beginner with geospatial analysis and Google Earth Engine. I am trying to classify only one class of Landsat 5 image (swimming pool). I got several training sites and applied the classifier. As ...
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77 views

Is there machine learning for image classification in ArcGIS 10.3?

I have access to ArcGIS 10.3. Do I need to get ArcGIS Pro to have access to machine learning? I've read that this is a built-in function in ArcGIS Pro. links: http://www.esri.com/esri-news/arcuser/...
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Using output of unsupervised cluster analysis to train supervised classification for vegetation mapping?

I'm using Google Earth Engine to classify mangrove forests from Landsat imagery to calculate extent. Let's say I perform an unsupervised K-means cluster analysis on a Landsat scene to identify general ...
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65 views

Incorporating NDVI and texture metrics in OBIA-Supervised Image Classification

Anyone knows step-by-step tutorials for incorporating NDVI and texture metrics in land cover classification with ArcMap? I've been doing supervised classification of Sentinel-2 with the assistance ...
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1answer
28 views

Area of classified pixels in an image collection

I am using Monthly History data of the Global Surface Water dataset (Asset id: JRC/GSW1_0/MonthlyHistory). I have filtered the images using .filterdate and .filterbounds for my region of interest (...
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Color different of two Sentinel 2A (L1C) images from the same sensing date

i'm new to this GIS Q&A websites and remote sensing as well, so sorry for this too basic question. It's about my Sentinel 2 (Level-1C) images. I downloaded 2 images with the same sensing date (09-...
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Know of any existing quality training/validation datasets for land cover?

Looking to do some moderate res. global land cover mapping and need as much training and validation data as possible--does anyone know of any good/quality land cover/land use data that are freely ...
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Use raster calculator on an Image Service in ArcMap or ArcGIS Pro

I'm mapping the approximate polygon shapes of dirt roads in a large area. I can see the roads clearly on the world imagery basemap and on the USA NAIP image service. Can I use Raster Calculator to ...
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QGIS Semi Automatic Classification SCP Plugin Runtime Error

I am using Landsat 8 satellite imagery for doing Supervised Classification using Semi Automatic Classification Plugin (SCP) in QGIS. I have created ROI's and done all the procedures for doing the ...
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1answer
23 views

Is it possible to see which Landsat bands were used most, when creating kmeans clusters?

I am using kmeans clustering (ee.Clusterer.wekaKMeans) to classify a Landsat8 image using all 11 bands. I was wondering if it is possible to see what bands are relied on most to create the clusters (i....
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Supervised Classification Imagery for rooftops

I'm trying to do a supervised classification in ArcPro that will allow me to find Tar and Gravel rooftops in Miami. I have Landsat data but just wondering if there is imagery out there with better ...
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1answer
163 views

GEE: Supervised Classification exceed memory

I am trying to do a supervised classification using Landsat images, DEM, Slopes, NDVI, etc. Is there any way to do not exceed memory limit? https://code.earthengine.google.com/...
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What indices work best for entropy computation for classifying lone standing trees?

Question: What bands or indices work best for entropy analysis of lone standing trees? Problem: In Google Earth Engine, I created a landcover classification for semi-arid africa with good accuracy....
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149 views

Orfeo TrainClassifier tool not working in QGIS

I have been using Orfeo Toolbox with QGIS (version 2.18.0) to do image classification. I was following this tutorial on YouTube on the SVM classifier. I have followed steps 1 and 2 as described, and ...
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Supervised Classification using Remote Sensing data?

Is there a correlation between the time that supervised classification takes to execute and the training areas that we choose? Perhaps if we take larger areas for classification will the ...
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1answer
209 views

About support vector machine classification

I want to classify Sentinel 2 images with the SVM in orfeo toolbox in QGIS. I have made a ROI (2 classes) and use TrainImages classifer (libsvm). I have made a SVM model,but when I use ...
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1answer
268 views

eCognition TTA Mask : Aerial images in ecognition for supervised classification

I am using eCognition Developer Trial 8.0. I have rgb Drone Otho foto. We want to classify this image for various biotope types exist in that region. We have already an existing classification as a ...
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i.cluster command with GRASS GIS

I am trying to do an unsupervised classification using GRASS GIS software. I have hyperspectral photo and now analyzing vegetation indices. Here is what I did: Created 2000+ raster photos with ...
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2answers
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Performing deep learning land cover classification using R?

I am really new to Deep Learning and, unfortunately, I can't find example codes on land cover classification other than this one where the author wrote a script in R for a large dataset. The main ...
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1answer
493 views

How do I manually edit raster layers on QGIS 3.0?

Main question: How do I manually edit raster layers on QGIS 3.0? Some context: I georeferenced Google Earth high resolution downloads on to QGIS, and was looking to do image classification for a ...
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Exporting classification error matrix Google Earth Engine

I did a supervised classification of land cover and I need to export the Validation error matrix to .csv file. When using 'Export.table.toDrive' an error message 'Invalid argument: 'collection' must ...
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1answer
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Can mosaic dataset be used as input to ArcGIS Pro's Image Classification Wizard?

I am currently not licensed for the Image Analyst or Spatial Analyst extensions of ArcGIS Pro. However, I am contemplating trialling/purchasing Spatial Analyst to perform image classification on a ...
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Jpeg Image Classification

I want to perform Image Classification(JPEG Image). I loaded the image in QGIS. Everytime i perform an action, i get a screen pop-up of Co-ordinate Reference System(CRS). How should that be handled? ...
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1answer
162 views

Beginning Image Classification? [closed]

I'm a beginner with remote sensing and have the task of creating a land use/land cover map of a region in India from IRS imagery. I've never performed an image classification before, although I do ...
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Appropriate resolution of images for image classification? [duplicate]

I am attempting to perform image classification on some maps that I have in PNG format. This classification is failing due to there being too many many pixels in the training samples (I appear to be ...