Object Based Image Analysis software

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Hydrocarbon Index in eCognition

I would like to use the Hydrocarbon-Index from Kühn, Oppermann, Hörig in eCognition. Formula for Envi: HI=2(float(b3-b1))/3+b1-b2 So I imported a Hyperion Dataset and try to create an arithmetic ...
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18 views

Segmentation boundaries image in eCognition

I need to save the segmentation result (boundaries image) as a raster file using eCognition. Anybody can give me some directions about this? Thanks, Jaime
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1answer
37 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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19 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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50 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 ...
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54 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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63 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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35 views

Multiple selections with eCognition

Is it possible to create multiple selections with the polygon tool within eCognition? Along the lines of: use poly tool, select an area, press down a hot key and select another area which adds to the ...
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1answer
67 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.
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1answer
74 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 ...
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12 views

Image mixing keyboard shortcut in eCognition?

I'm new to eCognition. Is it possible to map a couple of keyboard shortcut to the layer mixing slider (that appears in the bottom left of the viewport), one for +10% and another at -10% transparency? ...
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42 views

How to move samples in eCognition

I loaded a point shapefile in eCognition as a thematic layer. The objects that would fall on these points would be classified as samples. I want to move a sample in an another object in eCognition ...
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68 views

How to use shapefile as reference data in ecognition?

I have classified one forest type and like to compare this with shape file containing ground truth data of forest types. I would like to create a errormatrix in ecognition.
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95 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 ...
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70 views

eCognition to ArcMap?

So I have aerial photos that I have analysed in e Cognition, I now need to import them to ArcMap to finish my analysis however when I do the the image is in a completely different area. They have the ...
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80 views

eCognition - how can I produce samples from a shp

I'm looking how to use, in eCognition, some GPS points taken in my study area in order to produce automatically samples for the classes I've produced. I know that I can manually select samples but is ...
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85 views

What is the most correct way to perform accuracy assessment of the detection of only one type of materials from satellite data?

The error matrix is the most commonly used method for accuracy assessment that provides appropriate accuracy measures to compare different classification techniques. However, this kind of accuracy ...
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2answers
739 views

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 ...
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3answers
207 views

Estimating vegetation composition from digital images

I am running a Master's project researching Greater prairie-chicken nest and brood survival. Some of my intended covariates include local vegetation measures using digital imagery. I would like to use ...
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1answer
197 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 ...
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98 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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57 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 ...
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3answers
270 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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74 views

get an 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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188 views

eCognition: set region grow treshold by layer value difference

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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112 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 2nd one contains unclassified superobjects of the 1st shapefile. I want to compute ...
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2answers
363 views

How to filter by Selected Objects in eCognition?

I was wondering if there is any options in eCognition Developer to filter by selected objects. Suppose if I select some objects with polygon selection tool and want to use 'assign class'. In the ...
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3answers
579 views

How to generalize training data for a random forest classifier?

I am working with a random forest classifier in eCognition (new with eCognition 9.0). The image shows 8 NAIP tiles I am attempting to classify using approximately 100 training points. The training ...
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633 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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54 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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1answer
496 views

What software programs can run a supervised classification on an image segmented into objects?

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 ...
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1answer
575 views

How can I define hierarchical levels in eCognition

I'd like to define classes with 2 levels. Firstly I'm gonna classify some broad classes such as forest, grassland in a level 1. Furthermore, I'd like to classify these classes into some sub-classes ...
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1answer
862 views

Shapfile 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 ...
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1answer
273 views

Relational operation in eCognition

Is there anyone who has a experience with relational operation in eCognition. I'd like to ask 2 questions related to eCognition. 1. How can I classify the pixel values between 0.23 and 0.46 as a class ...
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1answer
335 views

How to link 2 different images in eCognition

I'd like to link 2 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? Thank you so much
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1answer
206 views

How to do separability analysis in eCognition?

Can I use eCognition to check which bands are more helpful to separate individual classes and to get output result? If so, how can I do this?
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6answers
1k 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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688 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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2answers
539 views

How to know what spectrum image layers are in eCognition?

I'm learning to use eCognition (8.1) and my teacher has provided me with some example tif files to segment and classify. The tif files have multiple layers, each of which are supposed to represent a ...
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1answer
67 views

Fixed Scale / Fixed Zoom in eCognition

I'm wondering if there is any option in eCognition Developer / Architect were I can control Zoom or Scale Factors. It's necessary for my work that I use the same scale for all processing steps.
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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? ...