Questions tagged [image-segmentation]
Image segmentation is the process of dividing an image into multiple regions (clusters or sets of pixels), based on some criterion.
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questions
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20 views
ArcGIS Pro 2.4.0 Image Segmentation - Higher spectral and spatial detail for high-resolution images?
I was watching a video regarding image segmentation in ArcGIS Pro 2.4.0. It was an ESRI event (2018), so the presenters were ESRI employees. Here's the video I am referring to: https://www.youtube.com/...
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18 views
Could not create GDALDataset
I'm doing several segmentation tests between satellite and drone images with rsgislib. On the satellite images I had no problem but when I try the drone images the following error appears after the ...
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1answer
73 views
Extracting the least area image around a Shapely polygon, with rotation allowed
I have a Shapely polygon
polygon_geom = shapely.wkt.loads(feat['wkt'])
such as:
I can map it onto an image
polygon_pts = np.array(list(polygon_geom.exterior.coords))
plt.imshow(img_array_pre)
...
1
vote
1answer
54 views
Object-based Classification in Orfeo ToolBox
I have a multispectral camera with 5 bands (r, g, b, red edge, NIR) and I would like to classify plants object based with Orfeo ToolBox. I am flying with the drone close to the plants and have an ...
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0answers
37 views
SNIC Algorithm and Classification using the clusters in Google Earth Engine [closed]
I have run the SNIC algorithm in GEE and want to classify the clusters into two classes.
I have 2 specific doubts.
Not able to compute cluster statistics like std dev( Layer is null).
Not able to run ...
0
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1answer
20 views
arcpy.sa.SegmentMeanShift() Creates segments with values outside of the range of original raster (stretched?)
I'm using arcpy.sa.SegmentMeanShift() to produce a segmented raster in ArcGIS 10.7.1.
The segments in the output raster have values outside the range of values (1 to 248) in the input raster (-22 to ...
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1answer
161 views
Is Google Earth Engine SNIC Segmentation algorithm inconsistent?
I have been using GEE for about a month now and I ran into some issue
I am trying to use OBIA classification based on this presentation by Sai Cheemalapati, EEAI 2019.
The main problem is when I ...
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0answers
36 views
Segmentation in OTB gives blank rectangle as output
I am trying to segment a raster image to get a vector output. I am using OTB 6.6.1 in QGIS 3.4. In the segmentation window, I selected the input raster which is a 3 band (true colour) sentinel 2 image ...
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0answers
26 views
Selecting certain segments when creating training set for classification in ArcGIS?
I am trying to classify an RGB image in ArcGIS 10.7.
When I try to use the 'select segment' option to create a training set I am allowed to pick only certain segments to add to my training set. For ...
3
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0answers
50 views
GRASS GIS Segmentation issue on UAV image
I tried i.segment to perform segmentation on a part of UAV orthophoto image, but this always results in stripe-like rectangle segments which I do not expect. Could anyone figure out what happens?
...
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210 views
KeyError: “The name 'ImageTensor:0' refers to a Tensor which does not exist. The operation, 'ImageTensor', does not exist in the graph.”
I'm trying to use ArcGIS Pro 2.3 and this tutorial (https://medium.com/geoai/high-resolution-land-cover-mapping-using-deep-learning-7126fee571dd) to use the function "Classify Pixels Using Deep ...
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vote
1answer
92 views
Batch changing of Raster Bands of Multiple Rasters in ArcGIS Desktop?
I have a ton of rasters in my ArcGIS project, each with 4 bands.
At the moment, I am changing the raster bands, one by one, for each file:
Red becomes Band 2
Green becomes Band 1
And I am setting ...
1
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0answers
30 views
Does contrast stretching help image segmentation and classification?
I am trying to identify and classify marine litter from drone RGB images at beaches. Due to the small size of litter and only having RGB images available, my supervisor recommended to carry out ...
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0answers
40 views
How to pixelwise annotation with QGIS
I need to create masks with QGIS of hedgerows for satellite images (raster) segmentation.
I tried with the SCP plugin but I can't use growing algorithm because I only want to keep hedgerows, not ...
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0answers
21 views
NoData cells appeared in segemented raster
I am trying to classify an aerial image of a dike into grass and weeds. I used an aerial RGB image of 10 cm resolution being a TIF file. This aerial image is cleaned and contains no gaps. Only outside ...
0
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1answer
139 views
GLCM measure in an object-based classification?
I am trying to classify agricultural fields with randomForest model. I will conduct an object-based classification. To do so, in the code by Ned Horning, I provide the boundaries in a shapefile. The ...
1
vote
1answer
126 views
How to extract 1 band image (Boundaries) in Google Earth Engine Code Editor
I am quite new in remote sensing and trying to get boundaries of fields to build a prediction model in R. I tried Canny and Hough algorithms but the results are not satisfying. Lastly, I tried the ...
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0answers
29 views
Stacking lidar-derived height raster as ancillary data for segmentation in ENVI?
I get a a black and white image after following these steps. Does anyone know why I'm not getting a color aerial image beneath the mask?
My setup consists of these steps:
I mosaicked several NAIP ...
1
vote
1answer
281 views
Google Engine - Segmentation
From the Google Engine scripts,
Is it available any Segmentation tool like the ArcMap "Segmentation Mean Shift" from ArcMap? I´m looking for crop-fields limit detection.
I tried the SNIC one ...
0
votes
1answer
50 views
OTB Orfeo ToolBox - TrainImagesClassifier ERROR ITK
When i use in QGIS 3.6 TrainImagesClassifier i obtain an error on vector file class :
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vote
1answer
75 views
Selecting segments from segmented layer using ArcMap?
Is there a way to select the segments from a segmented layer in ArcMap?
I've created a segmented layer by running Segment Mean Shift, but I can't seem to find a way to select or isolate the segments....
3
votes
0answers
126 views
Extract water areas from aerial photogrammetry DEM in QGIS
We are working with peatland restoration sites providing aerial photogrammetry of the restoration progress. We want to differentiate between areas water and bare peat which can look very similar in ...
3
votes
1answer
145 views
Orfeo mshift segmentation asks for condition
I'm trying to run a segmentation using the mean shift. I leave all the parameters as default, but when I run it, it says "Wrong or missing parameter value: Condition".
Condition is not a parameter for ...
2
votes
0answers
426 views
Classifying image using image segmentation in google earth engine
I am trying to classify a Landsat 8 image in google earth engine. I have to classify them object based, since I am building on an earlier research where they have used object based classification.
...
0
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1answer
144 views
Incorporating NDVI and texture metrics in OBIA-Supervised Image Classification
Anyone knows step-by-step tutorials for incorporating NDVI and texture metrics in land cover classification with ArcMap?
I've been doing supervised classification of Sentinel-2 with the assistance ...
1
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1answer
356 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 ...
2
votes
1answer
524 views
How to use a variable inside .expression() as conditional statements criteria in google earth engine?
I am trying to automate a segmentation process in google earth engine.
I have some parameters calculated outside of the .expression() function and needed to be used in defining different criteria ...
0
votes
2answers
113 views
Post process OBIS for Canopy Dedection
I have high resolution UAV-Images (4x4cm) in RGB and would like to detect individual tree canopy's. I was using Object Based Image Segmentation (OBIS) from SAGA to classify the images by homogeneous ...
0
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0answers
134 views
Performing Object Based Image Analysis with NAIP?
I use NAIP imagery (primarily in QGIS/GRASS) for agricultural analysis. I want to separate out objects such as grain silos, farms, buildings, &c. using segmentation and classification.
Is this ...
3
votes
0answers
820 views
Image Segmentation and Object-based Classification in Google Earth Engine [closed]
I have tested three methods to segment my image collection:
(https://code.earthengine.google.com/699f04706c114260068275acd2605644)
var l8sr = ee.ImageCollection('LANDSAT/LC08/C01/T1_SR');
function ...
4
votes
2answers
188 views
Automatic split a mosaic of satellite images into pieces
I have a mosaic of satellite images, but for the analysis, I need to define the boundaries of each part. Does anyone know how to do it in an automatic way?
I need to get the red boundaries like on the ...
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0answers
377 views
Select border region from segmented image
I have several thousand aerial photographs which have been scanned in and orthorectified, but the image borders and fiducial markers remain on the image. I am looking to identify these parts of the ...
0
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2answers
153 views
Multi-Spectral High Resolution Satellite images for flood events
I'm searching for multi-spectral high resolution satellite images for flood events.
I found a database of flood events from this link with dates and approxiamte locations (polygons) and I used the ...
1
vote
1answer
127 views
Segmentation vs raster_to_polygon
So, I am looking into raster segmentation methods and I started having a few doubts about what I know abouth their technicalities.
I was wandering if there is a way to connect raster-to-polygon ...
2
votes
0answers
193 views
split lines into segments without creating new layer in QGIS
How to split line objects into segments/multiple objects based on either polygons or lines without creating a new layer? The problem is clarified in the picture below. I need the green line to be ...
4
votes
1answer
5k views
Performing object based image classification in Google Earth Engine?
I am trying to perform an image segmentation using Google Earth Engine. I have performed OBIA in the past using python and scikit-image (skimage.segmentation.felzenszwalb) , but not sure how to do ...
2
votes
1answer
228 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
320 views
First time using i.segment.uspo in GRASS
I am using the module i.segment.uspo in GRASS for the first time and I wanted to know if anyone here haws experience with that add-on in GRASS so I can get some hints on how to use it more efficiently,...
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0answers
68 views
Extracting Roads and Trails from SPOT Imagery
Is it possible to extract Roads and Trails vectors from SPOT Raster Tiff Image? Actually I have tried SPRING software to extract road vectors from this raster. Yes, It gives good result, But ...
2
votes
2answers
158 views
Unsupervised Vector Classification in QGIS
I am trying to mimic a vector classification process in QGIS that can be done using the ArcGIS Business Analyst Segmentation Module in ArcMap.
My current best solution is to rasterize each of the ...
1
vote
1answer
796 views
Image segmentation
I am performing a segmentation on an NDVI using the OTB mean shift segmentation on QGIS 2.18.
The size of the image is about 15000*15000 with one band only and 8-bit. Since I do not want to use ...
1
vote
1answer
107 views
Big size shapefile
After a segmentation process I have obtained a huge shapefile that contains approximately 3 million entities.
The problem is that no process can be obtained on such a huge data using arcgis, qgis or ...
1
vote
2answers
303 views
QGIS Orfeo toolbox segmentation error “\otbcli_Segmentation” is not recognized
I have an old aerial image that I am trying to use Orfeo Toolbox's Segmentation tool in QGIS on. The image is grey-scale. I don't know if this is a problem or not, but I am experimenting at this point,...
1
vote
1answer
558 views
Image segmentation to locate trees [closed]
has anyone a suggestion which segmentation-tool is best suited for this task.
I'm looking for a fast tool to do this approx 1km²/day the faster the better of course.
I've tried Orfeo's "meanshift" ...
1
vote
1answer
128 views
How to perform segmentation in GRASS?
I have an aerial photo which consists of 2 files (.jp2, j2w) and i want to perform a segmentation.
To be exact, i can't upload the 2 files with r.in.gdal because it says that the data file cannot be ...
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1answer
816 views
Separate overlapping line shapes (or circle shapes) in raster data
I have a classifier that creates a (raster) segmentation mask that looks like this (after converting Raster to Polygon):
Now I'm wondering, whether there is a method to extract actual objects from ...
3
votes
2answers
742 views
“Object based Image Segmentation” and some options are absent in SAGA
Although I have the latest version of SAGA, "Object based Image Segmentation" and some options do not appear when I click on "Geoprocessing>Imagery> Segmentation>? " Why are they absent?
3
votes
1answer
3k views
Image segmentation in open-source software
For an analysis of several multilayer raster files I want to perform some kind of image segmentation (multi-resolution, ...) to extract polygon object of similar raster properties. I know that Trimble'...
4
votes
1answer
110 views
Why is a single road sometimes split into separate layers?
I'm using data from the Transportation section of the National Map (US). They provide three layers for roads: Trans_RoadSegment, Trans_RoadSegment2, and Trans_RoadSegment3. I seem to recall this ...
3
votes
1answer
366 views
SAGA 2.2.5 Problem Object Based Image Segmentation
Every time I use the Object Based Image Segmentation with Landsat 8 data I get a segmentated image which looks like a spider's web. The image contains no 0 values. Anyone has a idea how to fix this?
