Questions tagged [ecognition]
Object Based Image Analysis software
87
questions
1
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0answers
9 views
Calculating own index in ecognition
I calculated two layers in ecognition. The Lee Sigma edge detection dark and bright. Now I want to make a summation of the dark and bright edges. How can I do this?
I then further want to use its to ...
0
votes
0answers
20 views
Can't open an already existing project on Ecognition
I worked on my home computer and saved some processing through an Ecognition project, but it looks like I just can't open it on my office computer and get the following error message (attached).
How ...
1
vote
0answers
22 views
How to Interpret eCognition Best Classification Result [closed]
I am learning eCognition using the trial version. Having completed an object-based classification, I wanted to view the accuracy. I can't though find any straight-forward guidance on how to interpret ...
0
votes
0answers
15 views
Exporting Statistics of Selected Samples from eCognition to .CSV
I manually selected samples that I had used in the classification algorithm and would now like to develop a rule set based on the multispectral values of these samples. Is there any way to export the ...
1
vote
0answers
42 views
Exporting results of supervised classification using Ecognition
I am trying to export the result of the classification. I set the parameters as below. However, when I open the shapefile in QGIS, there's no category called "class name". Thus, I can't ...
1
vote
0answers
162 views
eCognition export samples as a shapefile problem
I need sample shapefile for the other project but when I try to export it, it gives me an error like domain is empty(no images object available). How can I get the samples as shapefile?
1
vote
1answer
197 views
Using thematic layer to restrict segmentation and classification in eCognition [duplicate]
This question has been asked before as Using thematic layer for segmentation in eCognition?.
However, I have not been able to resolve the issue using the answer provided.
Can someone clarify the ...
0
votes
0answers
147 views
How to redesign confusion matrices from Ecognition with python and seaborn?
I am using eCognition manual classification as a baseline for performance comparison with other 3D classification methods. For each method, I am creating confusion matrices in python with sklearn and ...
1
vote
1answer
36 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. ...
0
votes
1answer
282 views
Create training samples for eCognition [closed]
Most of the tutorial videos, they simply add those training samples. Looking at the attribute table they seems like, they in some specific format. Like all the training samples belonging to perticular ...
0
votes
1answer
192 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 ...
0
votes
1answer
144 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 ...
0
votes
1answer
50 views
How to stretch data in Cognition
I was learning eCoginition by tutorial, but still, not familiar with some advanced funcionality, such as stretching raster data.
As you can see, the values are condensed in a small portion of the ...
0
votes
1answer
27 views
Targeted Region of Interest Classification in eCognition
Is there a method of targeting only specific areas for classification in eCognition? Say, maybe using pixel coordinate constraints?
1
vote
1answer
45 views
Leaving Image Objects that are Uncertain to be a Particular Class as 'Unclassified' in eCognition
In classification of the imagery, is there a way of leaving certain image objects unclassified? Say for example, if the classifier is uncertain what class to classify the image object as, does ...
4
votes
0answers
66 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 ...
2
votes
0answers
82 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 (...
1
vote
0answers
46 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
vote
0answers
110 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 ...
1
vote
0answers
25 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
90 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
666 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
1k 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
373 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
202 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
125 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
0answers
159 views
Extract building footprints using a Normalized Digital Surface Model on eCognition [closed]
I have created a normalized Digital Surface Model (nDSM) by subtracting DEM from DSM. I have set a threshold value of 2 meters in order to eliminate objects such as shrubs, cars etc. Is there any ...
2
votes
1answer
289 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
581 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
334 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
510 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
votes
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
401 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
933 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
298 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
89 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
263 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
629 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
240 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
771 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
503 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
vote
0answers
353 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
4answers
623 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
51 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 ...
3
votes
0answers
226 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
78 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
611 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
967 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
1k 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 ...
