Questions tagged [ecognition]

Object Based Image Analysis software

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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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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 (...
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165 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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0answers
109 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 ...
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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 ...
2
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43 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
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501 views

Needed help to launch SVM classification in eCognition

I would like if somebody help me to launch SVM classification in eCognition. Have you met any tutorials? I was searching through ecognition community, but there I find only basic KNN supervised ...
2
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0answers
93 views

How to convert Whitebox .dep files for use in e-Cognition?

Could you explain me how can I convert .dep files into correct files to work in e-Cognition? I’ve exported the file in .sdat and .sgrd form using Export Layer, but I lose a lot of resolution. Any ...
2
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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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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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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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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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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', ...
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306 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?
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68 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 ...
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0answers
144 views

Ecognition project can't be saved

I run a project in ecognition but always get a reminder of error when saving it. The error message is: Error while saving project file 'L:\projects\New Project.dpr'
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551 views

Random forest in ecognition

I'm using eCognition to mapping roof materials from SPOT 6 image. I have used nearest neighbour classification but the result is not so good. I'm trying to apply a random forest classifier if it is ...
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194 views

What kind of raster mosaicking to use in land cover analysis

I have to mosaic two rasters (Landsat ETM+ scenes) to one single image and then analyse its land cover. Which option to use to avoid seeing a distinct line in the place where two different scenes/...
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239 views

How to select random objects in eCognition?

I classified a Landsat image in eCognition and now I want to select random objects so that I can compare their class to ground-truth data and perform the accuracy assessment. How can I do this in ...
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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 ...
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0answers
105 views

Merging of two maps having different data in ecognition

I would like to synchronise two maps having two data (map1 for building and map2 for vegetation) into main map.I used the rule set of "working with maps".But it doesn't merges the data.I am using ...
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2k views

How to generate TTA mask for accuracy assement in eCognition?

I'm learning to use eCognition software recently. I have done the image segmentation for Worldview-2 image. Then, I have processed for classification for class names (e.g forest,built-up area, grass ...
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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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30 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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24 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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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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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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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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1answer
303 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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444 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 ...