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.

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TreeSeg Documentation [closed]

EDIT: Found it --> https://treeseg.readthedocs.io/en/latest/ I have downloaded the TreeSeg repo found here --> https://github.com/apburt/treeseg developed by Andrew Burt. The issue I am running into ...
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27 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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Extract house and road using image Google Earth

where I live does not have gis data, only images from google earth, so I want to take advantage of this image to build gis data,it is local's road, river and house. I am a beginner with this job. I ...
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18 views

How to preprocess Bing Singleband Satellite image for eliminating different exposure tiles problem

I have used around 200 sqkm high resolution single band colour Bing image for object based image analysis on ecognition developer. But due to different tile based exposure made it worse to classify. ...
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Superpixel segmented image boundary into SpatialPolygons format

I have an image mask segmented through superpixels algorithm like this. I want to just extract its boundary and save it as a shapefile SpatialPolygons for using spatstat. Can anyone help on how to go ...
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32 views

How to run multi level segmentation for LULC in process tree, eCognition software

Can we run the eCognition multi level (level 1 ,level 2,...) segmentation and classification in the same process tree? I want different outputs to show for each levels in a process tree. I'm in the ...
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1answer
562 views

Pixel coordinate to world coordinates using Python

I have developed a semantic segmentation method to map certain objects in aerial imagery. Throughout this project I download pictures (4800x4800 pxs) where I know the min_x, min_y, max_x and max_y in ...
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42 views

Use edge detection to segment images

I have an RGB from which I detected the edges and I'm curious if I can use it to optimize a segmentation or as a mask to improve the segmentation to identify cultivated fields. Could you do that? If ...
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68 views

Extracting tree stems from LiDAR point clouds using 'bottom-up' approach

Let me preface by recognizing that there are some previous questions that are related but different than mine because they are focused specifically on tree crowns rather than stems here and here. I ...
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1answer
109 views

Creating a shapefile from a numpy array

I was following this tutorial: http://www.acgeospatial.co.uk/k-means-sentinel-2-python/ on how to generate an unsupervised classification for sentinel-2 images. img_ds = gdal.Open('data/products/...
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1answer
61 views

ArcGIS Pro 2.4.0 Image Segmentation - Higher spectral and spatial detail for high-resolution images?

I was watching a video regarding image segmentation in ArcGIS Pro 2.4.0. It was an ESRI event (2018), so the presenters were ESRI employees. Here's the video I am referring to: https://www.youtube.com/...
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38 views

Could not create GDALDataset

I'm doing several segmentation tests between satellite and drone images with rsgislib. On the satellite images I had no problem but when I try the drone images the following error appears after the ...
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249 views

Extracting the least area image around a Shapely polygon, with rotation allowed

I have a Shapely polygon polygon_geom = shapely.wkt.loads(feat['wkt']) such as: I can map it onto an image polygon_pts = np.array(list(polygon_geom.exterior.coords)) plt.imshow(img_array_pre) ...
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165 views

Object-based Classification in Orfeo ToolBox

I have a multispectral camera with 5 bands (r, g, b, red edge, NIR) and I would like to classify plants object based with Orfeo ToolBox. I am flying with the drone close to the plants and have an ...
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111 views

SNIC Algorithm and Classification using the clusters in Google Earth Engine [closed]

I have run the SNIC algorithm in GEE and want to classify the clusters into two classes. I have 2 specific doubts. Not able to compute cluster statistics like std dev( Layer is null). Not able to run ...
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22 views

arcpy.sa.SegmentMeanShift() Creates segments with values outside of the range of original raster (stretched?)

I'm using arcpy.sa.SegmentMeanShift() to produce a segmented raster in ArcGIS 10.7.1. The segments in the output raster have values outside the range of values (1 to 248) in the input raster (-22 to ...
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399 views

Is Google Earth Engine SNIC Segmentation algorithm inconsistent?

I have been using GEE for about a month now and I ran into some issue I am trying to use OBIA classification based on this presentation by Sai Cheemalapati, EEAI 2019. The main problem is when I ...
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43 views

Segmentation in OTB gives blank rectangle as output

I am trying to segment a raster image to get a vector output. I am using OTB 6.6.1 in QGIS 3.4. In the segmentation window, I selected the input raster which is a 3 band (true colour) sentinel 2 image ...
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32 views

Selecting certain segments when creating training set for classification in ArcGIS?

I am trying to classify an RGB image in ArcGIS 10.7. When I try to use the 'select segment' option to create a training set I am allowed to pick only certain segments to add to my training set. For ...
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GRASS GIS Segmentation issue on UAV image

I tried i.segment to perform segmentation on a part of UAV orthophoto image, but this always results in stripe-like rectangle segments which I do not expect. Could anyone figure out what happens? ...
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342 views

KeyError: “The name 'ImageTensor:0' refers to a Tensor which does not exist. The operation, 'ImageTensor', does not exist in the graph.”

I'm trying to use ArcGIS Pro 2.3 and this tutorial (https://medium.com/geoai/high-resolution-land-cover-mapping-using-deep-learning-7126fee571dd) to use the function "Classify Pixels Using Deep ...
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1answer
128 views

Batch changing of Raster Bands of Multiple Rasters in ArcGIS Desktop?

I have a ton of rasters in my ArcGIS project, each with 4 bands. At the moment, I am changing the raster bands, one by one, for each file: Red becomes Band 2 Green becomes Band 1 And I am setting ...
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38 views

Does contrast stretching help image segmentation and classification?

I am trying to identify and classify marine litter from drone RGB images at beaches. Due to the small size of litter and only having RGB images available, my supervisor recommended to carry out ...
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61 views

How to pixelwise annotation with QGIS

I need to create masks with QGIS of hedgerows for satellite images (raster) segmentation. I tried with the SCP plugin but I can't use growing algorithm because I only want to keep hedgerows, not ...
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24 views

NoData cells appeared in segemented raster

I am trying to classify an aerial image of a dike into grass and weeds. I used an aerial RGB image of 10 cm resolution being a TIF file. This aerial image is cleaned and contains no gaps. Only outside ...
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237 views

GLCM measure in an object-based classification?

I am trying to classify agricultural fields with randomForest model. I will conduct an object-based classification. To do so, in the code by Ned Horning, I provide the boundaries in a shapefile. The ...
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1answer
196 views

How to extract 1 band image (Boundaries) in Google Earth Engine Code Editor

I am quite new in remote sensing and trying to get boundaries of fields to build a prediction model in R. I tried Canny and Hough algorithms but the results are not satisfying. Lastly, I tried the ...
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34 views

Stacking lidar-derived height raster as ancillary data for segmentation in ENVI?

I get a a black and white image after following these steps. Does anyone know why I'm not getting a color aerial image beneath the mask? My setup consists of these steps: I mosaicked several NAIP ...
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1answer
426 views

Google Engine - Segmentation

From the Google Engine scripts, Is it available any Segmentation tool like the ArcMap "Segmentation Mean Shift" from ArcMap? I´m looking for crop-fields limit detection. I tried the SNIC one ...
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1answer
67 views

OTB Orfeo ToolBox - TrainImagesClassifier ERROR ITK

When i use in QGIS 3.6 TrainImagesClassifier i obtain an error on vector file class :
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1answer
87 views

Selecting segments from segmented layer using ArcMap?

Is there a way to select the segments from a segmented layer in ArcMap? I've created a segmented layer by running Segment Mean Shift, but I can't seem to find a way to select or isolate the segments....
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145 views

Extract water areas from aerial photogrammetry DEM in QGIS

We are working with peatland restoration sites providing aerial photogrammetry of the restoration progress. We want to differentiate between areas water and bare peat which can look very similar in ...
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1answer
160 views

Orfeo mshift segmentation asks for condition

I'm trying to run a segmentation using the mean shift. I leave all the parameters as default, but when I run it, it says "Wrong or missing parameter value: Condition". Condition is not a parameter for ...
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566 views

Classifying image using image segmentation in google earth engine

I am trying to classify a Landsat 8 image in google earth engine. I have to classify them object based, since I am building on an earlier research where they have used object based classification. ...
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1answer
192 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
438 views

Using thematic layer for segmentation in eCognition?

I have a thematic layer, i want to perform segmentation and classification only within the thematic layer,not in a whole image. how can i do it? I tried to segment the image after viewing the thematic ...
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1answer
652 views

How to use a variable inside .expression() as conditional statements criteria in google earth engine?

I am trying to automate a segmentation process in google earth engine. I have some parameters calculated outside of the .expression() function and needed to be used in defining different criteria ...
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2answers
128 views

Post process OBIS for Canopy Dedection

I have high resolution UAV-Images (4x4cm) in RGB and would like to detect individual tree canopy's. I was using Object Based Image Segmentation (OBIS) from SAGA to classify the images by homogeneous ...
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153 views

Performing Object Based Image Analysis with NAIP?

I use NAIP imagery (primarily in QGIS/GRASS) for agricultural analysis. I want to separate out objects such as grain silos, farms, buildings, &c. using segmentation and classification. Is this ...
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1k views

Image Segmentation and Object-based Classification in Google Earth Engine [closed]

I have tested three methods to segment my image collection: (https://code.earthengine.google.com/699f04706c114260068275acd2605644) var l8sr = ee.ImageCollection('LANDSAT/LC08/C01/T1_SR'); function ...
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2answers
218 views

Automatic split a mosaic of satellite images into pieces

I have a mosaic of satellite images, but for the analysis, I need to define the boundaries of each part. Does anyone know how to do it in an automatic way? I need to get the red boundaries like on the ...
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405 views

Select border region from segmented image

I have several thousand aerial photographs which have been scanned in and orthorectified, but the image borders and fiducial markers remain on the image. I am looking to identify these parts of the ...
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1answer
168 views

Multi-Spectral High Resolution Satellite images for flood events

I'm searching for multi-spectral high resolution satellite images for flood events. I found a database of flood events from this link with dates and approxiamte locations (polygons) and I used the ...
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1answer
158 views

Segmentation vs raster_to_polygon

So, I am looking into raster segmentation methods and I started having a few doubts about what I know abouth their technicalities. I was wandering if there is a way to connect raster-to-polygon ...
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198 views

split lines into segments without creating new layer in QGIS

How to split line objects into segments/multiple objects based on either polygons or lines without creating a new layer? The problem is clarified in the picture below. I need the green line to be ...
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1answer
6k views

Performing object based image classification in Google Earth Engine?

I am trying to perform an image segmentation using Google Earth Engine. I have performed OBIA in the past using python and scikit-image (skimage.segmentation.felzenszwalb) , but not sure how to do ...
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1answer
244 views

Duplicate Layers in eCognition

I am attempting to use eCognition Developer to segment and classify 5-band UAS imagery. When I go to create a new project in eCog and input my imagery (individually selecting the five .tif files), it ...
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2answers
355 views

First time using i.segment.uspo in GRASS

I am using the module i.segment.uspo in GRASS for the first time and I wanted to know if anyone here haws experience with that add-on in GRASS so I can get some hints on how to use it more efficiently,...
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70 views

Extracting Roads and Trails from SPOT Imagery

Is it possible to extract Roads and Trails vectors from SPOT Raster Tiff Image? Actually I have tried SPRING software to extract road vectors from this raster. Yes, It gives good result, But ...
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2answers
166 views

Unsupervised Vector Classification in QGIS

I am trying to mimic a vector classification process in QGIS that can be done using the ArcGIS Business Analyst Segmentation Module in ArcMap. My current best solution is to rasterize each of the ...