Questions tagged [ecognition]

Object Based Image Analysis software

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20 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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0answers
9 views

Accuracy Assessment-ecognition

When I did the accuracy assessment using classification stability or best classification result method in ecognition I got the output mean and std dev values in integer form not the decimal form . ...
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1answer
302 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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3answers
468 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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5answers
884 views

Extract DEM and DTM information from LIDAR image using E-Cognition

I´m trying to extract DEM and DTM from a LIDAR file. Currently, I rasterize the image but don´t know which algorithm I need to apply to obtain the DEM and DTM information in different models to be ...
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1answer
61 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 ...
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1answer
34 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
51 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 ...
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1answer
21 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 ...
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1answer
16 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?
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1answer
14 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 ...
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0answers
28 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 ...
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0answers
23 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 ...
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0answers
20 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
19 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 ...
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0answers
20 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 ...
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0answers
55 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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1answer
949 views

Seeking software programs to run supervised classification on image segmented into objects? [closed]

I am trying to run a supervised MLC classification on a multispectral remotely sensed image, however, I want the image to be classified using a shapefile of segmented image objects (as opposed to the ...
2
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0answers
551 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
149 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 ...
2
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0answers
57 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
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1answer
459 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
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0answers
37 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
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.
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
71 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
18 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
78 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
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3answers
422 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 ...
1
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0answers
219 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
246 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
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2answers
695 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
405 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 ...
1
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1answer
863 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 ...
1
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1answer
926 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 ...
0
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1answer
753 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 ...
0
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1answer
680 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
163 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 ...
1
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1answer
700 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?
2
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0answers
108 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
3k 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? ...
0
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1answer
264 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
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1answer
358 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
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1answer
930 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
254 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 ...
1
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1answer
243 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 ...
1
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1answer
434 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
749 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 ...
1
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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
79 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 ...