Questions tagged [image-segmentation]
Image segmentation is the process of dividing an image into multiple regions (clusters or sets of pixels), based on some criterion.
121 questions
0 votes
1 answer
111 views
Percentage of area overlaped / covered by features of another layer [closed]
I'm working with PostGIS. I have two vector layers : A first polygonal layer resulting from vectorization work using photointerpretation of the aerial imagery (in blue in the attached screenshot ...
- 1,106
2 votes
0 answers
52 views
Limit a raster processing to a subset/region/mask area in QGIS
I'm working in a QGIS environment (graphical interface). Specifically, I'm using a QGIS modeler. The processing toolbar provides access to QGIS, Grass, Saga, and Orfeo toolbox tools algo. My goal is ...
- 1,106
0 votes
1 answer
34 views
Why do the grid results obtained after using SNIC segmentation only have three values when exported?
I have designated a very small area and used the following code to spatially segment the sentinel image, and exported the segmented grid.Why are there only three values (-32768,0,32768) in the ...
0 votes
1 answer
26 views
Segmentation : How to skip/not Modelize Shadows?
With OTB via QGIS, I'm able to generate some interesting segmentations, particularly using the Generic Region Merging tool. The input image is the 20 cms aerial Ortho Infrared Color (green, red, and ...
- 1,106
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21 views
Orfeo toolbox : how to perform one clustering (kmeans) segmentation?
Is it possible with Orfeo to perform a clustering segmentation base method ? As far as i understood, with orfeo, we can perform several methods : region, edge, threshold (Mean shift), Connected ...
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52 views
Training samples not get saved
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 ...
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0 answers
53 views
Vector smoothing (polygons): topology/geometry problems
I performed a raster segmentation from a Spot6 satellite image with OTB. I polygonized/vectorized this raster segmentation in order to get a vector file. To limit the pixelation of this cover, I was ...
- 1,106
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42 views
QGIS/OTB : Permissions Error message (LargeScaleMeanShift segmentation)
With QGIS 3.34 and OTB 9, I have just tried to run one LargeScaleMeanShift segmentation. But I get this following error message : The problem seems deal with permissions. It would be possible to edit/...
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0 votes
1 answer
45 views
Orfeo tool box : Alternative to GRM segmentation module for big images?
With the orfeo GRM segmentation module, i obtain interesting results for small images/area , for instance for one input ortho image (3 bands) . Please see result below : i would like to get this kind ...
- 1,106
2 votes
1 answer
84 views
Post-processing segmentation for smoother crop type polygons
I have an image with 8 bands and I have applied k-means or DB-Scan to group the pixels into categories (files can be found at the link https://drive.google.com/drive/folders/...
- 942
0 votes
1 answer
49 views
Segmentation : how to add texture criterion ? (not only colour/spectral variable)
My goal is to generate a relevant segmentation that would delimit the main physionomic units (homogenous areas). Up to now, I have done several tests with qgis and orfeotoolbox 9 with the OTB Generic ...
- 1,106
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30 views
Moving samples between classes in eCognition 9.01
I’m currently using eCognition 9.01 and have encountered an issue with transferring samples between classes. Here’s the situation: I collected samples for a class called Ck and wanted to duplicate ...
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1 vote
1 answer
57 views
Segmentation label/ masks for GIS data
I'm trying to create segmentation labels/masks using a terrain GIS dataset to locate some objects (like trees). For the labels of trees, do I need to convert the geographical coordinates to pixel ...
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0 votes
0 answers
231 views
Google Earth Engine SNIC segmentation reproject method
I am trying to do SNIC segmentation and then classification in Google Earth engine. My problem is that every time I change the zoom scale, it gives me a new result with a recalculation. For this I ...
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0 answers
35 views
Extract images of sand dunes migration from 1st January 2021 to 20th December 2023 through Landsat9
I'm seeking to extract images depicting the migration of sand dunes between January 1, 2021, and December 20, 2023, utilizing Landsat 9 data. While attempting to retrieve this information using the ...
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