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Geographic Information Systems

Questions tagged [ecognition]

Object Based Image Analysis software

73 questions
info Newest Frequent Votes Active Unanswered
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6 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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14 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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8 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
12 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
52 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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1answer
171 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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26 views

Class Statistics in eCognition

I have created three thematic classes using eCognition. I created these classes from a multiband raster with 5 bands. Class 1 was created to include all values between value x and value y in band 1....
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1answer
385 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
161 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
102 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
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0answers
79 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
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1answer
146 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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3answers
231 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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1answer
166 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
239 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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2answers
700 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.
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1answer
286 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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2answers
423 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-...
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2answers
183 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
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0answers
67 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
208 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
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1answer
360 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
186 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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1answer
516 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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1answer
853 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 ...
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0answers
330 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
228 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
317 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
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0answers
38 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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0answers
160 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 ...
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0answers
305 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
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0answers
59 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
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1answer
305 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
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1answer
480 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
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1answer
690 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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1answer
346 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
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1answer
533 views

Exporting classified image from eCognition Essentials Trial license?

How do I export a classified image from the eCognition (Objected based) Essentials Trial?
2
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2answers
496 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
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1answer
609 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 ...
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1answer
854 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 ...
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0answers
570 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?
3
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1answer
674 views

Erode pixel areas in QGIS

I try to resize Pixel segments exported from eCognition. The goal is to erode the segments for one pixel of the boarder. So for example if the segment is 30px x 30px the result should be a new area ...
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0answers
117 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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0answers
389 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 ...
1
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0answers
436 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 ...
1
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1answer
762 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 ...
1
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1answer
163 views

Where to see smallest size of segmented object in eCognition?

I used ecognition to conduct segmentation, and I'm wondering where I can see the segmentation result, like the smallest size of object segmented.
0
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1answer
384 views

Fractal Net Evolution Approach (FNEA) Citation

I've been looking for some original source to cite for FNEA (Fractal Net Evolution Approach), instead of just citing eCognition. Does anyone know of a paper on the origin of FNEA? My searches just ...
1
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0answers
177 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/...
3
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2answers
3k views

How to perform an accuracy assessment in eCognition?

How to do accuracy assessment of classified images in ecognition? I have done the image segmentation for Worldview-2 image. Then, I have processed for classification for class names (e.g road,...

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