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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19 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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0answers
14 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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1answer
44 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
38 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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17 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
63 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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22 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
49 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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0answers
83 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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0answers
111 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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0answers
23 views
Non-visibility of .ECD file in ArcMap using Random Trees Classifier
I have been using the Random Trees (RT) algorithm in ArcMap 10.6 for classifying some Landsat raster imagery. I have the training data file which I input into the Train RT Classifier to produce the ....
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0answers
228 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
96 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
288 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
82 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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0answers
107 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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0answers
522 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
124 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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0answers
313 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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2answers
111 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
73 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 ...
2
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0answers
181 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
3k 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
164 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
261 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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0answers
59 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
148 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 ...
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1answer
730 views
Image segmentation
I am performing a segmentation on an NDVI using the OTB mean shift segmentation on QGIS 2.18.
The size of the image is about 15000*15000 with one band only and 8-bit. Since I do not want to use ...
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1answer
95 views
Big size shapefile
After a segmentation process I have obtained a huge shapefile that contains approximately 3 million entities.
The problem is that no process can be obtained on such a huge data using arcgis, qgis or ...
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2answers
271 views
QGIS Orfeo toolbox segmentation error “\otbcli_Segmentation” is not recognized
I have an old aerial image that I am trying to use Orfeo Toolbox's Segmentation tool in QGIS on. The image is grey-scale. I don't know if this is a problem or not, but I am experimenting at this point,...
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1answer
469 views
Image segmentation to locate trees [closed]
has anyone a suggestion which segmentation-tool is best suited for this task.
I'm looking for a fast tool to do this approx 1km²/day the faster the better of course.
I've tried Orfeo's "meanshift" ...
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1answer
122 views
How to perform segmentation in GRASS?
I have an aerial photo which consists of 2 files (.jp2, j2w) and i want to perform a segmentation.
To be exact, i can't upload the 2 files with r.in.gdal because it says that the data file cannot be ...
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1answer
683 views
Separate overlapping line shapes (or circle shapes) in raster data
I have a classifier that creates a (raster) segmentation mask that looks like this (after converting Raster to Polygon):
Now I'm wondering, whether there is a method to extract actual objects from ...
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2answers
650 views
“Object based Image Segmentation” and some options are absent in SAGA
Although I have the latest version of SAGA, "Object based Image Segmentation" and some options do not appear when I click on "Geoprocessing>Imagery> Segmentation>? " Why are they absent?
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1answer
2k views
Image segmentation in open-source software
For an analysis of several multilayer raster files I want to perform some kind of image segmentation (multi-resolution, ...) to extract polygon object of similar raster properties. I know that Trimble'...
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1answer
100 views
Why is a single road sometimes split into separate layers?
I'm using data from the Transportation section of the National Map (US). They provide three layers for roads: Trans_RoadSegment, Trans_RoadSegment2, and Trans_RoadSegment3. I seem to recall this ...
3
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1answer
345 views
SAGA 2.2.5 Problem Object Based Image Segmentation
Every time I use the Object Based Image Segmentation with Landsat 8 data I get a segmentated image which looks like a spider's web. The image contains no 0 values. Anyone has a idea how to fix this?
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0answers
363 views
Right Orfeo Toolbox Segmentation input
I made this tutorial. I used Landsat 8 bands (1-7), which I atmospheric corrected with DOS and converted to 8-bit. After that I layer stacked the pre processed band (1-7), clipped a little part with a ...
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0answers
597 views
Segmentation boundaries image in eCognition [closed]
I need to save the segmentation result (boundaries image) as a raster file using eCognition.
Anybody can give me some directions about this?
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4answers
1k views
Identifying individual trees and segmenting crowns from LiDAR CHM data?
I have a classified LiDAR point cloud for an area of 250*250 square meter, with 1 meter resolution. It has a 5 lakhs points with an average point density of 9 (means around 9 points within a pixel).
...
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1answer
312 views
Understanding SAGA Watershed Segmentation in QGIS: Error 1?
I am trying to run a watershed segmentation using the SAGA plugin in QGIS. Unfortunately, every time I have tried to run this on a specific file QGIS freezes. The log output reports the following:
...
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2answers
617 views
Devide heatmap into meaningful clusters
I created a heatmap containing population density data. Now I want to figure out the hotspots of this heat map. In other words: Where are the biggest population densities in my map?
My first thought:
...
6
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1answer
677 views
Segmentation of a big raster
I'm trying to convert one raster into a SpatialPolygons. I've got a big raster (12 millions pixels) with a lot of zeros, and some negative values (representing some depression in a DEM). I would like ...
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1answer
693 views
How to do segmentation of full raster image using OrfeoToolBox
I want to do segmentation of raster image using OTB segmentation(mean-shift). But it is generating the ouput for only selected region or part of the raster image. So if i want to do the segmentation ...
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1answer
126 views
Is there any comprehensive book or online instruction on image segmentation techniques? [closed]
I'm looking for a source to learn theoretical basis of image segmentation techniques thoroughly.
The desirable book, or other kinds of source you may know, should cover the techniques that are more ...
3
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1answer
1k views
Measurement of accuracy for image segmentation of land cover image in python
I have a land cover image and I segmented it using K-means clustering algorithm. Now I want to calculate the accuracy of my segmentation. How do I do that?
I have read about dice similarity co-...
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1answer
1k views
extraction of regions from segmented image in python
I have a land cover image and I segmented it. Since the images are large in size, I am uploading only a part of them. here is the original image's part :
here is the corresponding segmented image:
...
8
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2answers
15k views
image segmentation of RGB image by K means clustering in python
I want to segment RGB images for land cover using k means clustering in such a fashion that the different regions of the image are marked by different colors and if possible boundaries are created ...
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5answers
5k views
Extracting tree crown areas from remote sensing data (visual images and LiDAR)
I am looking for a method to process a remote sensing image and extract the crown areas of the individual trees from the image.
I have both visual wavelength areal imagery, and lidar data from the ...
11
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1answer
2k views
Multispectral image segmentation for natural-resources applications using R
R has the capacity for image segmentation, although all of the examples I have come across utilize a single band for the segmentation (example). I am interested in combining R's capacity for random ...
