Questions tagged [image-classification]
Image classification refers to the task of extracting information classes from a multiband raster image.
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Inspecting Segment Attributes with Training Data using ArcGIS Pro
I'm using ArcGIS Pro to undertake object-based image analysis. I'd like to take this to the next level by doing some deeper statistical analysis on my segmented rasters to analyse how different ...
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63 views
Image Segmentation and Classification with Google Earth Engine
I'm new to using Google Earth Engine and I obtained the following code from Medium and tried to update it with the AOI and training data for my specific area. I am trying to classify landcover for an ...
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QGIS: Error [24]: The following signature does not match the band set. MC_ID: 1 C_ID: 1
I have run my classification map in QGIS using the semi-automatic classification plugin or SCP.
I want to use the same ROIs for different sentinel imageries. But I faced an error
Error [24]: The ...
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1answer
60 views
Validate a supervised classification in Google Earth Engine using ground truth data
I ran a supervised classification in Google Earth Engine (GEE) using the following script.
// add an image, bounds, filter data and sort by cloud cover
var limitiNapoli = 'PathToMyasset'
var image =...
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“User memory limit exceeded” during Random Forest classification in GEE
I succeeded in an initial attempt at using Random Forest classification on my input image (an exported mosaic covering ~ 2,797 km2). I used 30 trees, classified based on 4 bands, and passed a training ...
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17 views
GEE index image segmentation and classification
I have a code for performing an index calculation on chosen images and in chosen AOI. The next step I want to do is segment it by pixel value and classify them into 3 groups. I mean a range of pixel ...
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1answer
117 views
Applying Otsu thresholding method to raster in QGIS
How can I apply Otsu’s threshold method to a Raster in QGIS for reduction of a gray level image to a binary image?
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2answers
177 views
Computing Excess Green Vegetation Index (ExG) in QGIS [duplicate]
I have to process the image for Sugarcane row detection and extraction.
Sample image is accessible from the link: https://github.com/AndresHerrera/croprows_generator_pa_v2/tree/master/droneimages
I ...
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25 views
Memory issue loading raster into numpy array
I am trying to open a historical imagery tiff dataset into a numpy array so I can do some image processing on it afterwards. However, it gives me 'unspecified error' when trying to run the (very) ...
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1answer
74 views
Normalising image bands in google earth engine before classification [closed]
I have an image that has four bands. Three of them are derived from Sentinel-2 to give NDVI, NDBI and SAVI. The fourth band is derived from a Sentinel 1 SAR image collection. The Sentinel 2 bands have ...
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51 views
Maximum Likelihood Classification not working correctly in ArcMap
I am trying to classify the 3 bands RGB image in ArcMap 10.8. I have prepared some training samples, and performed the MLC. The result is returning 3 classes instead of all 6 classes that the training ...
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38 views
How to programmatically identify landmarks (cemeteries) in Google Maps satellite data?
I'm searching Google Maps satellite view for cemeteries that are not listed in common repositories of cemeteries. I've spent a lot of time cruising around satellite mode searching for small ...
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Running Train Random Trees Classifier which classifies by probability and not discrete classes using ArcMap
I have a a series of points which values' are a binary of a feature being present or not-present and a multiband raster of various landscape varables.
Is there a way to use random trees classification ...
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30 views
Preparing training data for crop species classification from drone images
I have high resolution multispectral (R,G,B,NIR,RE bands) images of a field taken from MicaSense RedEdge mounted on a drone. There are various species of crops planted. I want to classify the crops or ...
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1answer
32 views
Why are my forest areas orange and non-forest areas green in Google Earth Engine?
I'm doing GEARS' 3rd lab tutorial on Remote Sensing in Google Earth Engine.
I calculated the NDVI of an area in Batchellor, Australia. The result is a black and white image so I added a color palette. ...
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36 views
Accuracy assessment of RFclassificatiton in dzetsaka plugin QGIS
I tried random forest classification on dzetsaka plugin in QGIS to discriminate different plant species using sentinell(10m) and planet(3m) image. Classification is performed but i am confused about ...
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45 views
Classification Wizard: Object-Based Supervised Classification - should the segmented image create a segmented classified product?
My goal is to use the values of my 12-band input mosaic, the segmented image I've already created from the 12-band, and create a classified object based image. I'm using the Classification Wizard in ...
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1answer
146 views
Install Orfeo Plugin in QGIS - Plugin is not already in QGIS core
I am brand new to QGIS (coming from ArcGIS), and am needing to install the Orfeo toolbox to do some image classification. I found a nice tutorial here with an overview on how to install it: https://...
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54 views
Input image does not match with signature file in supervised classification
I have a issue in supervised classification on ERDAS IMAGINE. When ever I performed supervised classification it gives a warning message. It says:
iInput image does not match signature's image ...
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283 views
ArcGIS Pro Classify Raster Failure ERROR 002834
I am trying to run the Classify Raster tool in ArcGIS Pro 2.5 using an .ecd file generated from the ISO Classifier tool. I am using a composite of Sentinel bands run through the PCA tool and an ...
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1answer
28 views
Can the ArcGIS Pro deep learning tools detect objects in non-nadir imagery?
I have been asked to look into developing a deep learning tool to identify objects from 360 degree panoramas. Can this be done using the deep learning tools in ArcGIS Pro? I suppose there are two ...
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1answer
193 views
Errors when uploading image to Earth Engine directly from the Cloud Storage bucket
I wanted to upload the image to Earth Engine directly from the Cloud Storage bucket with the earthengine command but encountering some errors
!earthengine upload image --asset_id={OUTPUT_ASSET_ID} --...
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40 views
Graphical interface to fine-tune input parameters (arguments) for SNIC segmentation in GEE
For SNIC segmentation in GEE, I want to have a graphical interface (e.g., slider) to adjust input parameters (arguments). I have attached screen shot and request to technical guidance (sample code) ...
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46 views
Interactively select parameters for snic segmentation in GEE
Which functions/methods/ in GEE , one can use to play with or interactively choose snic segmentation parameters i.e., compactness,size,etc . I have tried ui.slider, linked map but need a code to ...
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234 views
Script error: Git protocol error - Google Earth Engine [closed]
I am doing supervised image classification in Google Earth Engine. For that, I am labeling points on the map to create a dataset. I have labelled around 2.9k points. Now when I am labeling more points ...
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1answer
84 views
Extracting NDVI for Landcover Classes in Google Earth Engine
I am working on a project where I have created a supervised classification of an image which contains four land cover classes. I have reduced the classification to a frequency histogram that displays ...
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1answer
477 views
Looking for a deep learning platform for image recognition, preferably in QGIS [closed]
As part of a project I am working on, I am collecting an image training dataset consisting of various images of agricultural fields (details spared for confidentiality). The end goal of the project is ...
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1answer
54 views
Processing and classifying satellite images using Python [closed]
I wish to process and classify Sentinel2-L2A images using solely Python (Google Colab). Is it possible to do such a thing, and if so, what libraries should I use?
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2answers
52 views
Unsupervised pixel classification in ArcGIS Pro 2.4.0: ISO cluster will not let me classify image into three classes
I am using ArcGIS Pro 2.4.0, and am attempting to classify a field into a schema with three categories: Leaves, Shadows, and Soil. Here is a sample of the original RGB image:
Through supervised ...
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64 views
Why is my bands showing black after atmospheric correction using SCP plugin(DOS1) in QGIS or DOS in Erdas?
I am classifying Landsat TM and Landsat ETM (level 1) scenes for my study area as part of my research(LU/LC). The scenes are in a single tile and span 5 different timelines. I have done the ...
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46 views
Problem exporting a large classified image in Earth Engine
I am trying to export a GeoTIFF image but it doesn't work. https://code.earthengine.google.com/fe534ace7f3fc4fdfd155ded24155525
When I export the large classified image to Google Drive, I don't get ...
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1answer
53 views
Techniques to map small water bodies in desert
Techniques to map small water bodies in desert
I have task to map water bodies in a desert. I used landsat 8 and calculated three indices called NDMI, Tasseled Cap Wetness, & AWEIsh. I am ...
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1answer
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What should be the spatial resolution of the classification output if I am using all the bands of Sentinel-2 sensor?
Sentinel-2 sensor have 10 m, 20 m and 60 m pixel resolution depending upon the wavelength band. If I use all the available bands in my classification, what should be the resolution of the output ...
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1answer
188 views
Classification error “Layer error: Property 'class' of feature '00000000000000000000_0' is missing”
I am trying perform a Random Forest classification using an uploaded shapefile of polygons with only one class = 0. Get error Cover crop classification: Layer error: Property 'class' of feature '...
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88 views
Google Earth Engine SNIC: Why is changing the compactness parameter not altering the segments?
I'm using Google Earth Engine's SNIC algorithm for an OBIA classification.
When trying to play around with the segmentation parameters to get nice segments, I noticed that altering the compactness ...
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44 views
select waters pixels in GEE as magic wand tool
I am interested to map small water bodies in a desert . I used Gond method described in an article entitled "An Assessment of Surface Water Detection Methods for Water Resource Management in the ...
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1answer
86 views
Unsupervised classification “Error: Image.sample: Computed value is too large.”
I am trying to do an unsupervised classification for a small area in Barcelona. I uploaded an RGB image of 0.25cm of spatial resolution and I derived some indexes from it. Then, I added all the ...
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1answer
220 views
No Data was found error after applying a MaxEnt classifier (GEE)
I am trying to redo this tutorial: https://developers.google.com/earth-engine/classification, using the MaxEnt classifier with my data.
Code: https://code.earthengine.google.com/...
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Need assistance in project regarding Change Detection
My task initially was to classify the area into land-use classes like forest, sparse vegetation, agriculture, river, etc
I had done that by clustering the whole area and then reclassing it.
I had to ...
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1answer
44 views
Unable to export Testing and Training data as TFRecord using Google Earth Engine
While trying to export training (about 700 points) and testing data (about 300 points) as TFRecord, I am getting the following error:
User memory limit has exceeded
The code I have written, is ...
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45 views
Running complex ML model highest resolution tiles
I was thinking of using Google Earth Engine to run a relatively complex ML model (tensorflow based), on high resolution tiles (RGB). About 0.5m/px input would be the best. I need to process entire ...
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1answer
79 views
What is an appropriate scale and numPixels for unsupervised classification in google earth engine
I am trying to do an unsupervised classification based on a sentinel-2 composite. However, I am running quickly into time out and maximum memory problems. I am sure that it has to do with the scale ...
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44 views
Is panchromatic usable for supervised classification schemes in R or QGIS?
I am using Worldview-2 and Worldview-3 panchromatic images from 2019. I am looking at discrete topographical features which are easily delineated as polygon ROIs. However, I only have this ...
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1answer
77 views
How to chessboard segment landsat pixel edges in python?
Does anyone know how to do a chessboard segmentation (in the same way that ecognition does) that will select all the edges of a Landsat pixel in python/a Jupyter notebook? Given that I can use the ...
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Encoding categorical variable for random forest with sklearn
I have a random forest model that works pretty well, taking a bunch of vanilla remote sensing raster data as input. I think it could be improved with addition of some information that I currently have ...
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Validation SVM classification on Google Earth Engine
Can someone please help me to write the code for the Validation of the classified images resulted from a fusion between Landsat and Corona images.
The code below but I keep getting errors about the ...
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When creating a confusion matrix, can you have more ground-truth points than the recommended 10-times the number of classes you have?
Using ArcGIS Pro, I classified a field of grain sorghum (supervises, pixel-based support vector machine) using 5 classes: Soil, Shadows, Leaves, Heads, and Ground targets (this was a UAS study). The ...
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389 views
gtk.css:2:33: Failed to import in Grass GIS
When first I run GRASS GIS 7.6.0, there is an error message :
(gis_set.py:4772): Gtk-WARNING **: 16:05:43.648: Theme parsing error:
gtk.css:2:33: Failed to import: Error opening file
/home/mega/....
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1answer
549 views
Implementing proportional stratified random sample in R
I've completed a landcover classification on an Landsat Image and would like to start an accuracy assessment. I'd like a stratified random sample that has a sample number that varies based on each ...
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1answer
126 views
How to randomly stratify sampling within landcover classes?
I'm working on an accuracy assessment of a classified landsat image and I'd like input on the best possible way to generate random points across both the classified image and a ground truth image I ...
