Questions tagged [ecognition]
Object Based Image Analysis software
82
questions
0
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0answers
6 views
Random Forest Classifer parameters in eCognition
I am using Random Forest Classifer in eCognition for land use land cover clasification using Sentinel Imagery.
I don't have much idea on RF Classifier. I am looking for some explanation and ...
0
votes
0answers
13 views
How to use a shapefile to Object based classification on eCognition?
Let me ask you a question about object-based classification with eCognitoin's Developer license.
With the esstentials license, after the segmentation, a shape file to be used as teacher data was read ...
0
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0answers
17 views
eCognition Accuracy Assesment Tool problem
I'm narrowing down a vegetation RF classification in eCognition along a river course, it's going very well but I've run into a problem with my Accuracy Assessment. The gist of it is that my class sums ...
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0answers
14 views
Removing Last Permanent Image Layer in eCognition
In eCognition Developer I have a string of algorithms to remove my image layers before reloading them, but every now and then I receive a message saying:
Cannot remove last permanent image layer
...
4
votes
0answers
52 views
Same LiDAR data but different results in ArcMap and eCognition
I have generated raster layers based on LiDAR Number of Returns in both ArcMap and eCognition but the results are quite different.
I ArcMap I used LAS point to Statistics to Raster Tool, in the ...
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0answers
19 views
Generating LiDAR First returns in eCognition
I'm trying to rasterize a LiDAR point cloud in eCognition 9.3.2.
I want to create a raster layer by using LiDAR first returns, but I cannot find First returns option in Rasterizer Settings-Point ...
2
votes
0answers
45 views
Extracting object volume in eCognition?
I am a beginner in eCognition and am working on trying to extract volume for certain classified objects. When I extract volume with the ruleset given in the program it is the same value as the area (...
0
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0answers
12 views
Integrating block shapefile into segmentation level in eCognition? [duplicate]
I am trying to perform an object based hierarchical network classification of an urban scene in eCognition. To make the classification better I thought adding the building blocks shapefile in the ...
1
vote
0answers
32 views
How can you identify loam/clay settlements with Sentinel-2 Images when using eCognition?
I am doing my thesis research about analyzing settlements in Mali with Sentinel2 images with the use of the program eCognition (object-based). We have trouble with determining the settlements because ...
1
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0answers
59 views
eCognition- is there an 'undo'
I'm using eCognition developer trial, and when developing a ruleset in the process tree sometimes I make an error. However, just deleting that line of code (after extracting) doesn't undo that line in ...
0
votes
0answers
7 views
Creating a landuse file from classification done in eCognition
I used eCognition to classify the landuse of a river basin over several years. How can I make the results into one that can be used for HEC-GeoHMS?
0
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0answers
40 views
eCognition multiple layer import
I am currently working with a Geotiff file, which contains 60 different layers. Now I want to create a few classifications, but the attempt to import them into eCognition fails with the error message:
...
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0answers
19 views
Is there a way to reuse the samples chosen for NN classification for an another image?
I recently carried out the classification of a UAV multi-band orthoimage using NN method in eCognition. I have another orthoimage from the same mission for a neighbouring area. I would like to apply ...
1
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0answers
17 views
Quantifying level of urbanization of catchment over time?
I am studying the impact of urbanization on the discharge levels of a river during flooding events. For this, I need to determine the catchment's percent urbanized area through land classification ...
1
vote
0answers
71 views
LiDAR first and lastreturns eCognition [closed]
Recently I downloaded the new version of eCognition Developer. I remember that before when processing LiDAR data by using algorithms it is pretty easy to generate LiDAR first and last returns.
...
1
vote
1answer
375 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 ...
1
vote
1answer
742 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 ...
0
votes
1answer
272 views
Polygon Selection in Manual Editing (eCognition)
eCognition software allows manual editing on segments with the options such as"polygon selection, line selection, rectangle selection and cut object manually". In my study, polygon selection option ...
2
votes
0answers
149 views
Set a rule for grow region in eCognition
I am using the grow region algorithm in eCognition sofrware in order to merge my candidate class.
I want to set the rule : two candidated objects are merged only if the length/width ratio of the ...
2
votes
0answers
103 views
Dissolve by Class in eCognition?
I have a lot of numbered classes in my eCognition project (version 9.0.1), which contains approx. 2 Mio. segments. All segments have been assigned to a class and now I want to merge them (basically do ...
2
votes
1answer
232 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 ...
1
vote
3answers
371 views
The raster or shapefile exported from Ecognition does not align with the original raster when I open it in QGIS
The raster or shapefile exported from Ecognition does not align with the original raster when I open it in QGIS.
I'm using Ecognition to classify a raster, but when I export the shapefile and open it ...
0
votes
1answer
243 views
Using a template matching correlation image to extract lines
I need to measure the length of the rows which are visible in the images. I have used template matching with a portion of the row as the template.
Along a row, there will be matches which are ...
1
vote
1answer
376 views
How to make subset from satellite images without getting empty border?
I have Landsat 5-8 images, and after creating subset for the area of interest there is an empty border on the image as black part. How to remove it or how to create subset without it? Here is the view ...
0
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2answers
1k views
How to add a shapefile in eCognition?
I added the shapefile from thematic layers but I am not able to view the imported shapefile in the project window on the image.
1
vote
1answer
346 views
Performing object based image analysis of Landsat scene in eCognition Developer?
I am completely brand new to eCognition Developer and want to test out Object Based Image Analysis (OBIA) on a Landsat scene of one portion of the Chesapeake Bay. I have been unable to find any online ...
1
vote
2answers
619 views
Using texture in eCognition?
I would like to explore the possibility of using texture in an ecognition algorithm for classifying vegetation. Though, it seems to be based on sub-objects I am not sure how to actually create the sub-...
0
votes
2answers
238 views
LANDSAT 8 Road Extraction
I have 80 LANDSAT 8 Images. I can able to create composite image using Arcgis and then Pansharpen it to produce 15m multi-spectral image as a input for classification process. My requirement is to ...
2
votes
0answers
78 views
Black and white aerial image classification with ecognition fails to execute
I am trying to classify an image in ecognition, it gives a good number of well shaped polygons, but when I try to execute the classification, it only shows one class; I've done the same process for ...
1
vote
1answer
238 views
identification of Forest cover area by using eCognition Software
How to find forest cover area by using eCognition software?
I'm trying to find vegetation by using NDVI in the ruleset but it takes vegetation too with the forest.
Can I use any other filter along ...
0
votes
1answer
483 views
How do I delete a class in Ecognition?
I have used the software Ecognition to create a land cover & land change map. I used the class Barren in two images. However, I do not want to use the class Barren anymore. I have reclassified the ...
1
vote
0answers
215 views
ecognition- template matching result export
I am doing template matching for tree detection purpose using ecognition software. When I export the point layer result from ecognition into QGIS using the 'export the existing vector layer function', ...
1
vote
1answer
659 views
Thematic layer in ecognition
I want to assign class by thematic layer in ecognition. I have digitized road edges and I want to classify the roads in my 'road class' using the shapefile (polyline) of my roads. How do I do this?
1
vote
1answer
1k views
How to use thematic layer for supervised classification in eCognition
I'm classifying vegetation in eCognition. From ArcMap I already have a shapefile with training polygons that I would like to use for this but so far I was only able to insert this as a thematic layer ...
0
votes
0answers
426 views
Copy class in higher level in eCognition
I use eCognition to do classification. I do segmentation and I class it in level-1. Then I do segmentation in level-2. How to copy class from level-1 and paste the class in level-2 ?
There is 'Copy ...
1
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0answers
285 views
How to perform accuracy assessment in eCognition?
I have already done the classification using Nearest neighbourhood, and how do I continue to complete AC with TAA?
1
vote
1answer
407 views
How to define projection of a raster file in ecognition?
I have a raster file with no spatial reference. How can I define a projection for the image in ecognition software for classification purposes?
2
votes
0answers
42 views
eCognition - prevent rounding of raster values?
I have a WorldView2 image, which I would like to segment and classify in eCognition. The image has been pre-processed to Top of the Atmosphere Reflectance, therefore hasvalues between 0-1.
The ...
2
votes
0answers
199 views
Change Detection using Vector files [closed]
I have two shapefiles showing LULC of the same area for two different years; 1990 and 2015. Number of Polygons in two files are different but the number of class in both are same.
Is there any way ...
1
vote
0answers
401 views
import training samples on ecognition [closed]
How can I import these shapefile as training samples for each land use class hitachy in ecognition software? After importing step, how can I category land use classes?
1
vote
0answers
65 views
Corrupted Image Layer of DPR File (eCognition Project)
I just started working with eCognition a few months ago and it is my first time to encounter a problem.
I was on the refinement stage (and almost done manual brushing objects) when I found out that ...
1
vote
1answer
439 views
Interpolating LiDAR: same steps but different results?
I'm new to eCognition, and today I tried to use LiDAR data in the program.
First, I converted LiDAR to new image layers: 1) Elevation (first return) and 2) Number of Returns (all returns). I got ...
0
votes
1answer
703 views
Exporting training samples object statistics in eCognition
I have training samples collected for my four sites. I need to run CART for feature selection off eCognition. The only way I know is to recollect samples using manual classification which is not ...
1
vote
1answer
852 views
Merging in eCognition
I know how to merge two polygons in ArcGis, I have tried to merge two unclassified polygons as one in eCognition for a while now and nothing is working. still remains two separate polygons. Can ...
1
vote
1answer
403 views
Automatic Land Cover Classification Method in eCognition?
I'm exploring several methods of classifying multi spectral data in eCognition.
The classification will be fairly high level; I'm not trying to find individual species but want to identify areas of ...
0
votes
1answer
653 views
Exporting classified image from eCognition Essentials Trial license?
How do I export a classified image from the eCognition (Objected based) Essentials Trial?
2
votes
2answers
647 views
Nearest Neighbour Classification in eCognition
I have a few papers and youtube videos explaining how to conduct the NN classification in eCognition but it isnt giving me any output.
I think the confusion is arising when trying to define the ...
0
votes
1answer
757 views
Export Thematic Raster Files algorithm in eCognition not resulting in Raster output
I am trying to export a classification from eCognition in raster format and have tried both the Export Thematic Raster Files and Export Classification View algorithms and get a generic File as an ...
-1
votes
1answer
1k views
How to interpret accuracy assessment results for classified data?
eCognition has the ability to perform an accuracy assessment for classified data by using an error matrix based on a TTA mask. The image shows the results of the accuracy assessment.
Is there a ...
1
vote
0answers
677 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?
