Questions tagged [ecognition]

Object Based Image Analysis software

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1answer
244 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 ...
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0answers
516 views

Setting region grow threshold by layer value difference using eCognition?

I'm trying to use the "grow region"-algorithm in eCognition Developer 9 on an yet almost unclassified 1x1 (=pixel resolution) chessboard segmentation. I classified nothing but my "seed points" by a ...
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0answers
140 views

Getting objects (maximum) diamater in eCognition?

i'm trying to model some tree crowns in in eCognition Developer 9. I already do have some objects which are more or less of a circular shape but slightly irregular (because of overlapping in the ...
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0answers
35 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 (...
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1answer
309 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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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 ...
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0answers
28 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 ...
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2answers
915 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.
9
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1answer
2k views

Ditch Extraction using LIDAR DTM (1m resolution)

I'm trying to extract ditches using the LIDAR DTM using the software eCognition but I am actually having a hard time since the paper where I based my workflow entitled "Ditches’ network extraction and ...
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0answers
42 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 ...
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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?
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31 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
16 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 ...
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0answers
15 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 ...
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0answers
61 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. ...
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3answers
310 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 ...
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0answers
210 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', ...
2
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1answer
198 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
553 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-...
1
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1answer
327 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 ...
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1answer
627 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 ...
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1answer
373 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?
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1answer
832 views

Using shapefiles as a reference for accuracy assessment in ecognition

I classified my project and got an ESRI shapefile with points in it. Those points are hand made samples with the right class assigned to them. Now I need to use those samples to check my own ...
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1answer
626 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 ...
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1answer
618 views

Saving samples in eCognition

In eCognition developer is it possible to save samples that I have selected for nearest neighbor classification with the workspace or project? Every time I close and reopen my project I have to re ...
2
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0answers
133 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 ...
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1answer
606 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?
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0answers
97 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 ...
9
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4answers
2k views

How to distinguish buildings from vegetation in LIDAR data?

In order to extract the vegetation mask in ecognition, with object base analysis, with creation of the rule sets, the buildings were also classified! Any idea how to extract building from vegetation? ...
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1answer
218 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 ...
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1answer
327 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 ...
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1answer
788 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 ...
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2answers
212 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 ...
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1answer
232 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 ...
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1answer
379 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 ...
2
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2answers
569 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 ...
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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 ...
2
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0answers
75 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 ...
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1answer
2k views

Shapefile created in QGIS does not fit in eCognition project

I have various shapefiles - some created by others, some created by my self. They should all have the same size of the underlying Raster file. The shapefiles have been created on top of a Raster file ...
0
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1answer
437 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 ...
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0answers
396 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 ...
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0answers
267 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
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1answer
386 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 ...
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0answers
361 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?
2
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0answers
40 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 ...
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1answer
145 views

Comparing unclassified super-objects with classified sub-objects

I have two shapefiles exported from ecognition. The first shapefile contains the land cover classification and the second one contains unclassified superobjects of the first shapefile. I want to ...
2
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0answers
184 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
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1answer
651 views

How to link two different images in eCognition

I'd like to link two different images in eCognition to find the same pixels on both images. The images have same projection (geog lat/long). How can I do this?
9
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6answers
2k views

How to programmatically check if the number of shapes = number of table records?

I have a handful of approximately 1000 shapefiles that are corrupted (see attached error message). The shapefiles were generated from eCognition Developer 8. There is a script tool that seems to ...
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0answers
64 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 ...