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The field of raster image processing

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4 views

Pansharpen landsat mosaic in Google Earth Engine

Does anyone have a good way to pansharpen an entire mosaic of landsat 8 images? I would use the Panchromatic band (band 8). I have found tutorials on how to pansharpen a single image, but not for a ...
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0answers
50 views

Get information about current coordinates and rgb values in openCV window

I have started to learn OpenCV python library for remote sensing data processing. And when I open window by: cv2.imshow I can't know x,y coordinate and RGB values in current mouse position. How to ...
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1answer
24 views

Colorize radar imagery so it looks like optical imagery

Here is an imagery from a radar satellite Is it possible to colorize a radar image, so it looks like and enables the same kinds of analysis as for an image captured from an optical satellite (simple ...
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1answer
53 views

conditional statements for raster in R - land surface temperature

Im trying to calculate Land surface temperature estimating with Landsat 8 images, but i got stuck in one place and i cant move on. I m following split window algorithm. I calculated NDVI and I have ...
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1answer
29 views

Satellite image in ArcGIS darker than usual

This is one image from 2013 in some área. This is another image from 2014 in the same área, but darker. why? How can I display it like in 2013. Both are Landsat 8 images.
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1answer
114 views

Retrieving exif tags from GeoTiff with GDAL?

I work on toolkit that automatically classifies data from a bunch of aerial cameras. Each camera uses geotagging to store position and time metadata in EXIF tags. When I use GDAL (I use version 2.0....
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1answer
22 views

I can apply tasseled Cap transformation in surface reflectance (not ToA)?

I can not understand if I should adjust the Tasseled Cap index with the surface reflectance values or the Top of Atmosphere
3
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0answers
37 views

Processing drone Images of body of water?

I took some pictures of a body of a body of water using a multi-spectral sensor attached to drone. When trying to process the image using Pix4D, more than 50% of pictures were unable to calibrated. ...
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0answers
59 views

How to compare 2 NDVI images using python?

I want to compare NDVI of 2 images(TIF) of the same area of interest using python. My end result is to get the region on the image where NDVI is decreased(to depict crop damage). Problem: Images have ...
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0answers
16 views

ArcGIS imagery analysis difference raster errors

I have two DEM rasters from the USGS NED dataset. One is from 2013 and one is from 2017, the extents should, and appear to, be 100% identical. I ran the difference function on the ArcGIS Imagery ...
3
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1answer
48 views

ArcMap Image Analysis Window - functionality is grayed out

In ArcMap's Image Analysis Window, none of the tools are available even though I have a raster selected in the window. I do not have Editor turned on. I can't identify why the Processing tools are ...
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1answer
54 views

Is image registration necessary among temporal Landsat images?

I am working on a project comparing each pixel every 4 years for the same AOI from Landsat Images (1986-2017). It involves with Landsat 5, 7 and 8 images. Do I need to perform image registration as ...
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1answer
116 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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0answers
18 views

Image interpolation from original earth coordinate matrix to a new earth coordinate matrix

I have a geographical image covering a certain locations in New York State. Each pixels corresponds to a locations which its latitude and longitude can be obtained (Or you can say that each pixels ...
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1answer
23 views

radiometric calibration tool not working

I am trying to processes Landsat image using ENVI 5.3 cracked version and when am trying Radiometric calibration tool it does not working it display "Radiometric calibration failed; )>: am trying ...
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2answers
86 views

Why such a large difference between overlapping LiDAR DEM values?

Background: Using Arc Desktop 10.5.1, I have been tasked with mosaicking two adjacent LiDAR rasters (I'll call them A and B). They were flown, processed and supplied under contract by different ...
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1answer
149 views

R: Display single band raster in true color

I have a static image of a Bing maps tile (Mercator EPSG: 3857) with satellite overlay in PNG format. I read the PNG as a raster and georeferenced it in R by setting the corner coordinates using the ...
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2answers
115 views

SCP QGIS sentinel 2 authorization error

I am using Qgis 2.18.16, when i tried to download sentinel 2 via SCP interface, I am getting following error
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0answers
66 views

How to add metadata such as geokeydirectory, geoasciiparams, modelpixelscale and modeltiepoint to a compressed tiff image?

I have resized my original tiff file (1.5gb) to a tiff file (170mb). But there was no geo reference points in the resized image which was present in my original tiff file. I have attached the ...
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1answer
144 views

Wrong extent when importing geotiff into R

I am trying to import a geotiff of 8-band satellite imagery into R using raster. g <- raster('16SEP22191919-M1BS-057310833010_01_P001.tif' ) When I call the object it displays the extent as the ...
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1answer
52 views

Seeking software to pick up rectangular shape of basketball courts?

Is there any software/plugins for remote sensing or object orientated classification for my 3 band aerial image? I want the program to be able to pick up open air basketball courts or badminton courts ...
2
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2answers
328 views

Creating visually standardized RGB images from Sentinel-2 data

I want to create "visually appealing" RGB images from Sentinel-2 L1C data in a standardized manner. Obviously, this starts with extracting the bands 4, 3, and 2, which correspond to the Red, Green, ...
2
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1answer
140 views

Channel swap when reading created image with Gdal

I use a function on python (3.5) to create GTIFF with GDAL: def array2raster2(fname, matriz, geot, proj): drv = gdal.GetDriverByName("GTiff") dst_ds = drv.Create(fname, matriz.shape[1], ...
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1answer
41 views

Mosaicking two mosaics in ArcMap

I am trying to mosaic together two smaller mosaics with two Landsat scenes each in ArcMap 10.2 but have come across an issue. As background, I am mosaicking the scenes this way since each of the ...
4
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1answer
101 views

Is preproccessing a Landsat scene necessary for image classification?

I am classifying Landsat TM scenes for the entire Chesapeake Bay as part of my Master's research. Scenes have been collected from 1986 to 2016 in 5 year increments for my area of interest. I recently ...
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0answers
312 views

SAR processing in R? [closed]

Anyone know if a package for processing SAR data in R exists? Such as doing calibration, terrain correction, classification on e.g. Sentinel 1 data?
2
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1answer
44 views

GRASS m.nviz.image render artifacts

I'm trying to render images of a dome lit from multiple angles in GRASS using the m.nviz.image render plugin. Whilst the DEM displays nicely in the map display, I'm getting weird fractal patterns ...
2
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2answers
273 views

Missing Landsat TM scenes for the year 2005?

I have searched Landsat TM images (path/row 149/37) for the year 2005 (1st Jan to 31 December 2005) on Glovis, Earth Explorer, Landsat Look and University of Maryland archive to work with. However, no ...
2
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1answer
90 views

Using satellite images for manual delineation - is pre-processing required?

I'm new to using satellite images. I'm using Landsat images from USGS (Level 1 data), so terrain-corrected. I want to manually delineate different forest classes using false color composites. Do ...
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1answer
226 views

Pixel value of Sentinel 2A L1C download

As I can read in many posts, it is necessary to convert Sentinel 2 L1C pixel values from Digital Count to TOA reflectance by dividing with the scaling factor. However when I open my image in SNAP, ...
2
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1answer
530 views

Filter Image Collection by Multiple WRS Path/Rows in Google Earth Engine?

How can I filter an image collection in Google Earth Engine by multiple WRS paths/rows? This is an example of a filter using one path.row: var sr2011 = ee.ImageCollection('LANDSAT/LT5_SR') ....
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0answers
44 views

Adjusting Spatial Accuracy of Ortho Imagery in ArcGIS Desktop?

I have about 35 square miles of orthorectified, high resolution, aerial imagery that is broken down into 620 individual tiff files. I have created a mosaic dataset of the imagery and I am working ...
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2answers
506 views

completing satellite imagery tiles when data coverage is less than 100%

I want to join several images (>=2) into one "best" image. Best is defined on low cloud cover and high data coverage. An example using free Sentinel satelite data follows. See http://sentinel-s2-...
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1answer
217 views

Find maximum of large (size) multiple rasters

I have several large rasters (300MB - 1GB), each raster has been reclassified with numpy array and GDAL blocks. I now need to create an output file with only the maximum value per pixel used in the ...
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1answer
67 views

How to convert NoData values to other values for raster data?

I have a NDVI map from MODIS data for my AOI. When classified, i noticed that few of the pixels appear in " white" color and show no value. How do i classify these pixels and attache an appropriate / ...
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1answer
81 views

Classifying concrete material through greyscale in ArcGIS Desktop?

I get greyscale image successfully , but I have some query about pixel value classification, because concrete have cement,fine and coarse aggregate. How can I classify this material through greyscale? ...
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2answers
440 views

Calculate NDVI image from R and NIR channels and rescale it to 0-255

I have images of plants taken in Red(R) and Near End Infrared(NIR) field, I calculate the NDVI image per pixel using the below formula, NDVI = (R-NIR)/(R+NIR) , for all pixels, I get a range ...
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0answers
56 views

Make Chessboard stack Image

I am learning some literature of works and came across a beautiful representation of image in chessboard form. That misaligned is not my current concern. We are group of bachelor students and are ...
7
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0answers
215 views

Executing bidirectional dijkstra on TIFF image?

Can anyone indicate an example of how to do this? Link, tutorial etc... I started a discussion here about how to load a TIFF image like a graph nicely answered by @sehe. But, in this post the image is ...
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0answers
170 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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1answer
66 views

Detection of avalanche debris based on their distinctive shape

I want to detect avalanche debris of a known avalanche using Sentinel-2 optical imagery. I've calculated the Normalized Difference Snow Index and from there I've extracted all the values above 0.4 ...
3
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0answers
486 views

Using WATERSHED to delineate tree crowns in ArcGIS Desktop? [closed]

I'm trying to delineate and count trees from a DSM/DTM generated from a UAV survey. It's from a citrus grove where trees are growing in different spacing. I have developed a workflow that works for ...
5
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2answers
331 views

Calibrating Landsat Level-1 Precision and Terrain (L1TP) corrected data?

My study will involve Landsat OLI, ETM+ and TM scenes for forest biomass change assessment (Time Series Analysis) using different vegetation indices and textures. According to the official site https:/...
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1answer
186 views

Calculating band depth image for M3 data

I am working with chandrayaan M3 hyper spectral data. I need to create a band depth image for identifying mineral abundances. How do i calculate the continuum reflectance value for producing a band ...
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1answer
190 views

Preparing an integrated band depth image

How do i prepare an integrated band depth image? If i have to prepare an 1 micrometer integrated band depth image (sum of 0.79 and 1.3 band depth micrometer bands), do i just average all bands from ...
0
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1answer
126 views

Why is ArcPy script looping through bands slow?

I am working on a single tiff with over 20k bands, each representing daily temperature, and I'll be extracting and preforming simple raster math on roughly 3500 of the bands. The problem I'm running ...
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0answers
301 views

What causes this rainbow image artifact in Google Maps satellite imagery?

I discovered this "rainbow" over the Yellowstone River in Google Maps: View the site in Google Maps: https://goo.gl/maps/y6xETmY859M2 You can see a distinct red, yellow, and blue streak hovering ...
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0answers
247 views

How to save an image stretch/enhancement in ENVI?

I am using ENVI 5.3.1 and viewing a georeferenced satellite image with a linear 1% histogram stretch applied to the entire image. When exporting the image with the current histogram stretch using File-...
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1answer
70 views

R Script for Computing Image Means and Raster Value Subtractions

I have a very specific script I am trying to make which computes image flatfields. Basically, I am computing a Master Dark Frame (MD) by averaging a set of Dark Photos. I have a set of light photos ...
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2answers
2k views

Supervised image classification in QGIS

Is it possible to do supervised image classification in QGIS? I require it for the estimation of cover management factor (C factor) in USLE