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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How to accurately isolate Europe from a rasterised world map image
There is a World Map of Autumnal UV provided for educational purposes by Nina Jablonski (created by George Chaplin) that I want to analyse.
In particular, I want to use Python to statistically analyse ...
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Google Earth Engine SNIC Segmentation tilescale error
I am very new to Google Earth Engine and object based image analysis.
First of all, I am trying to do image segmentation using the SNIC algorithm.
This is my code and I got " Tile error: Output ...
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Apply single label image classification in Google Earth Engine
I am trying to apply single label image classification in Google Earth Engine in the context of Bragg Scattering. What I'm trying to do comes down to the following: Assign a single label (e.g. Bragg ...
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Properly configure image segmentation on QGIS (Segmentation / MeanShift)
I'm trying to perform remote sensing on georeferenced historical satellite images (taken from Google Earth), using the segmentation algorithm from OTB.
In the parameters of the Segmentation algorithm, ...
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QGIS - OTB Segmentation - Remove artifacts
I'm using the algorithms from OTB, to segment and perfom remote sensing on mangrove areas.
The idea here is to delineate mangrove cover from different satelite images and, later, compare mangrove ...
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In remote sensing and image processing what does the term "spectral domain" mean?
In remote sensing and image processing what does the term "spectral domain" mean? How could this be understood in an image segmentation context?
In an article on segmentation of satellite ...
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Keeping scale consistency with SNIC algorithm in GEE
This is more of a theoretical question about scale when using the SNIC algorithm in GEE.
I'm doing an object-based classification in GEE using the SNIC algorithm and then random forest to classify the ...
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Make each pixel value display a different color in a shapefile
[TLDR]
I am working on converting a segmentation model output into a shapefile that can be added as a layer on a map. I was hoping to find how to make each pixel value have a different color instead ...
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Create new shapefile layer per raster layer
In QGIS i have several hundreds raster tiles. For a deep learning application i would like to create segementation masks. To achieve this, my approach is to make a new shapefile, create the polygon ...
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Orfeo Toolbox on Mac
I managed to install OTB 8.0.1 in QGIS 3.22 on Mac using a comment on this community. However, the plugin is not working when I try to use "Segmentation". The process tells something like ...
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OBIA image segmentation
I am trying to conduct OBIA image segmentation in QGIS. However my raster file size is 8GB and the segmentation is incomplete. I understand QGIS can't process more than 2GB in RAM and my question is ...
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Selecting a specific land cover type based on colors in GEE
I want to select a specific land cover type in a land cover map obtained from the GEE dataset.
Because I know the corresponding hex colour code, I tried the colour code as a condition to filter the ...
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How to classify tree cover overlapping roofs in eCognition
This might be a fairly simple question, but I'm new to eCognition. I'm using Developer 10.2. For canopy that overlaps rooftops, I need to define these areas as separate objects and classify as canopy.
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Does GRASS's i.segment use all bands of data in a GeoTiff?
I'm trying to understand more about how the i.segment algorithm works. Most importantly, does it use all of the available bands in an image? The documentation notes you must specify a group. When I ...
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Orfeo Toolbox segmentation - increasing n segments
I'm checking out the parameters for Orfeo's Segmentation tool and I'd like to know how to increase the number of segments that are output in the vector output.
https://www.orfeo-toolbox.org/CookBook/...
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Object-Oriented LULC Classification in Google Earth Engine
I am testing a object-oriented LULC classification approach in Google Earth Engine, using the code available at the following link: https://code.earthengine.google.com/4032fe102252b285ec249f395d0d6d0f....
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nDSM tree detection using scipy watershed
I am trying to generate segments with single trees in a normalized surface model (nDSM). I tried using scipy.ndimage to achieve this, but the segmentation results are not precise. I would like a ...
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Image Segmentation and Classification with Google Earth Engine
I'm new to using Google Earth Engine and I obtained the following code from Medium and tried to update it with the AOI and training data for my specific area. I am trying to classify landcover for an ...
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Using GRASS i.segment in Python 3 stand alone script on Windows10
I installed GRASS GIS 7.8.1 on Windows 10 using a OSGeo4W.
I would like to use in a stand alone Python 3 script the i.segment GRASS tool.
I saw some related questions (e.g., Using GRASS GIS in Python ...
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Image Segmentation tiff files for Object Detection
I have tiff files generated fro 12 bands of sentinel-2a data. I want to label each pixel of the tiff files as belonging to copper mine or normal.
After labelling I want the image format to stay as it ...
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How to estimate overlap of certain pixel colors in a raster image and a linestring shape added on top of it?
I am trying to calculate how much of the electric feeders exist underneath tree covers. I am using NAIP infrared satellite imagery and have a shp file for a feeder circuit. Like so:
I need to find ...
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eCognition export samples as a shapefile problem
I need sample shapefile for the other project but when I try to export it, it gives me an error like domain is empty(no images object available). How can I get the samples as shapefile?
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Scene boundary issue when reducing sentinel 1 in natural values vs dB
I have written a function that smooths sentinel 1 images by reducing across clusters created from a sentinel 2 median image, and then reduces the sentinel 1 collection to the p5 value. When I run the ...
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Applying less than and greater than threshold in image segmentation in Google Earth Engine
I am trying to segment the images based on the threshold values. For instance, I want to put a threshold range between > 800 and < 1200, but with my existing code in Google Earth Engine, I can ...
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ArcGIS Pro Classify Raster Failure ERROR 002834
I am trying to run the Classify Raster tool in ArcGIS Pro 2.5 using an .ecd file generated from the ISO Classifier tool. I am using a composite of Sentinel bands run through the PCA tool and an ...
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Using thematic layer to restrict segmentation and classification in eCognition [duplicate]
This question has been asked before as Using thematic layer for segmentation in eCognition?.
However, I have not been able to resolve the issue using the answer provided.
Can someone clarify the ...
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Orfeo Toolbox error
I'm using segmentation (mean-shift) tool in Orfeo Toolbox with QGIS
I used a subset of pansharpened image from Worldview3 after orthorectification.
But, I got same error whenever I tried:
2020-07-02 ...
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Earth Engine, how to convert 0 pixel values to transparent or nodata?
I'm using the following snippet to convert canny edges to black and white to highlight boundaries. However, I want to fill the black area with transparent or NODATA, is there a way to do this in EE?
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Extract house and road using image Google Earth
where I live does not have gis data, only images from google earth, so I want to take advantage of this image to build gis data,it is local's road, river and house. I am a beginner with this job. I ...
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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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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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Pixel coordinate to world coordinates using Python
I have developed a semantic segmentation method to map certain objects in aerial imagery. Throughout this project I download pictures (4800x4800 pxs) where I know the min_x, min_y, max_x and max_y in ...
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Use edge detection to segment images
I have an RGB from which I detected the edges and I'm curious if I can use it to optimize a segmentation or as a mask to improve the segmentation to identify cultivated fields.
Could you do that? If ...
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Extracting tree stems from LiDAR point clouds using 'bottom-up' approach
Let me preface by recognizing that there are some previous questions that are related but different than mine because they are focused specifically on tree crowns rather than stems here and here.
I ...
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Creating a shapefile from a numpy array
I was following this tutorial: http://www.acgeospatial.co.uk/k-means-sentinel-2-python/ on how to generate an unsupervised classification for sentinel-2 images.
img_ds = gdal.Open('data/products/...
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Higher spectral and spatial detail for high-resolution images using ArcGIS Pro Image Segmentation
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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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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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)
...
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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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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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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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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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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 ...
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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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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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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 ...
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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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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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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 ...
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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 ...
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