Questions tagged [rgb]

An image encoding scheme with three bands, one for each primary color.

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2 answers
55 views

FME unwanted conversion of RGB to palette in PNG writer

I have a pile of TIFF images (aerial photography) that I want to convert to PNG. Band interpretation of my source TIFF files is allways RGB, cp. gdalinfo: C:\OSGeo4W>gdalinfo -mm -stats s:\ER-GIS-...
1 vote
0 answers
35 views

How to generate/export a RGB raster layered over a hillshade raster based on visualisation palette in R

I have defined my own colour palette, and written my raster as a GeoTIFF with the colour palette saved into the image using the code below. col_rmp <- c('#0180FF', '#0101FF', '#01FFFF', '#01FF01', '...
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Pansharpening: why does my pansharpend image show false color?

I pansharpened RGB with panchromatic image by using GDAL tool in the QGIS. But, it shows false color even though I changed the order of the band. Why can I not see the true image? I attached a photo ...
2 votes
1 answer
60 views

QGIS: reprojecting .tif from EPSG:3857 to EPSG:4326 - Output Darkened

I'm using QGIS to re-reference a batch of satImages from one CRS to another. I've got it to run and complete, that's fine. However, looking at the images pre-processing they are bright and vivid in ...
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0 answers
163 views

Converting raster to DEM using QGIS

I have a .jpeg file with three channels, and would like to convert this to a DEM to generate contours lines to export as a vector. I've added a screenshot below of the image in qgis, and a profile ...
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3 votes
1 answer
44 views

Saving orthomosaic .tiff data with symbolization changes using QGIS [duplicate]

I changed the symbolization of my .tiff data such that the NDVI band (Band 1 (Gray)) is represented with 4 colors (RGB derived). Is there a way I can save the .tiff including the symbology changes? ...
3 votes
1 answer
51 views

Are RGB values encoded/recorded in raw LAS/pointcloud data?

RGB info in the pointcloud: Is this always from a post-processing step (e.g. using imagery overlay techniques to do so) or does it in some cases come from the machine/sensor which recorded the LAS?
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134 views

Why is 3 band RGB Image true colour?

“If you can't explain it to a 6-year-old, you don't understand it yourself,” said Albert Einstein. After working with GIS-Systems for a long time, I have found that sometimes the most basic questions ...
1 vote
1 answer
56 views

Resample layer but keep RGB bands (QGIS)

I have an orthophoto from a drone with a spatial resolution of 0.02m and would like to reduce the resolution to 1m. The simplest way of doing this is using the export>save as>and manually fill ...
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1 vote
0 answers
69 views

Correcting color of soil and water using QGIS

RGB single band image merged together result as shown in photo. After I merged them, I found out the blue color part is actually soil, but show up in blue instead of brown or actual soil color. How do ...
0 votes
1 answer
71 views

Create false color images on Earth Engine

I want to calculate some band ratio images on e.g. Aster imagary and display them as false color image. For example I compute band ratio images on Aster as follow: var BR1 = AsterImageMosaic.select('...
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2 votes
1 answer
71 views

Adding RGB attributes to voxel

How can I add the RGB attributes to a voxel object? The idea is to give RGB to the colorargument inside the plot function in lidR. And still have the attribute Z as the legend in the RGLwindow. The ...
0 votes
0 answers
42 views

What is the difference? : in xdg-open in linux and QGIS in window

I made a rgb raster image with using GDAL script in the Linux (Centos7) environment. When I open the rgb image with xdg-open, it's too dark, but when I open it in the QGIS, it is clear and more ...
1 vote
0 answers
47 views

Linear fit in GEE, why is the ouput plotted as an RGB image and what do the max and min values signify?

I am currently reading up on the linearFit() and linearRegression() in GEE. I was looking at the developer guide for these functions, which I think I understood correctly, except for the way in which ...
1 vote
1 answer
297 views

Classification of drone imagery (RGB) with SCP

How can I work on the classification in orthophotos (generated by Metashape from a DJI Phantom drone) when I cannot input the orthopoto into the band set? SCP does not find the raster of the ...
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0 votes
2 answers
2k views

Downloading RGB Sentinel-2 with Google Earth Engine and Python

I am fairly new to the Google Earth Engine platform, and I want to create a dataset for my machine learning project using the aforesaid platform. As far I have this code for downloading a single ...
0 votes
1 answer
525 views

Vegetation indices extraction from RGB images

I have been working on the project to classify crops as health or unhealthy. For this task I have taken the open source dataset from the the website https://www.sensefly.com/education/datasets . It ...
0 votes
1 answer
167 views

QGIS: multiple mosaics bands to 1 Visual RGB

I have UAV raster converted with Pix4D mapper in transparents mosaics blue, green, red, nir, pir. Which tool can I use to translate into a visual RGB image?
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1 vote
0 answers
400 views

Produce RGB image of satellite image mosaic or merge images with negative dimensions

I am new to image processing with python and would like some help with a particular problem. I am trying to create a mosaic of raster satellite images using the code extracted from this link https://...
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4 votes
1 answer
61 views

Plot RGB values for each feature seperately

I want to plot each rgb value for its respective feature of the layer via pyqgis. Atm I struggle to properly implement it for each layer individually. With my current code below, all features get the ...
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1 vote
0 answers
37 views

While exporting GeoTIFF doubles in size [duplicate]

I was given an RGB GeoTIFF orthomosaic image that is just over 10GB. I pulled it into QGIS and tried clipping it to get under 10GB (to use in another program that only allows up to 10GB). Though when ...
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2 votes
0 answers
579 views

Python gdal.translate doesn't write the output file

I am very new with gdal and python in general, therefore pardon my simple question. I have a geotiff (single band, black and white) that I want to change from grayscale to RGBA (becasue I want to use ...
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1 vote
1 answer
2k views

How to export a RGB image from Google Earth Engine?

I have a natural color of Hawaii Main Island to export, but when I exported it, it only showed a grayscale information in QGIS, but I know that this is not a QGIS problem, it's from GEE. This was the ...
2 votes
1 answer
548 views

How to export/generate a RGB/stack raster based on raster visualization palette in R

I have this data: r <-raster(volcano) And the plot generated: plot(r) How to generate or export a raster with this color palette (or any other) with spatial reference?A RGB/stack raster. For ...
1 vote
1 answer
31 views

Does geospatial server software exist which can support dynamically generated imagery as a WMS?

Here's the situation: Input: A bunch of data (NetCDF) that contains seperate variables/arrays for R/G/B channels. Desired output: Web service (e.g. WMS) that can serve simulated true-color imagery ...
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1 vote
0 answers
176 views

r raster:: extract band (integer) values from raster buffer without taking the mean

I want to extract values from my RGB raster, which are in the buffer(zones) of my 14 station points data. So far the values are extracted with the raster::extract by taking the mean of some values ...
1 vote
1 answer
194 views

Extracting contours from .jp2 DEM dataset

Problem: I have received a data set from a municipality that is a 3-layer LiDAR JP2 DEM and need to extract ground contours at 1 m intervals for a specified area (more below). Programs available: ...
1 vote
1 answer
418 views

Converting (Corine) land cover palette to RGB within Google Earth Engine

I'd like to export a Corine Land Cover (CLC) Map (i.e. an image from ee.ImageCollection("COPERNICUS/CORINE/V20/100m")) from Google Earth Engine go my Google Drive, forgoing the need to any external ...
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1 vote
1 answer
289 views

Zonal histogram from 3 band RGB soil raster

I have soil map with 3 RGB bands and I need a zonal histogram for polygons from this raster (how many pixels of each soil the polygon contains). First I tried to sieve the raster and then get zonal ...
2 votes
1 answer
82 views

Why do RGB values seem very high for my multispectral orthomosaic imagery?

I am using ArcGIS Pro (2.4.2) to analyze a 5-band multispectral image captured with a Matrice 200 (UAV). All image processing has been done with Agisoft Metashape, which includes calibrating spectral ...
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0 answers
78 views

Convert 1-band .nc file to GeoTiff with RGB

How can I convert 1-band .nc file to GeoTiff with RGB? I have tried using gdal translate but it won't let me apply color interp of RGB to the .nc as it has 1 band.
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-1 votes
1 answer
743 views

QGIS - RGB multiband to HSB(HSV?) multiband

I need to calculate the following index on parts of a drone image (RGB multiband) DGCI = [(Hue - 60)/60 + (1 - Saturation) + (1 - Brightness)]/3 Is HSB the same as HSV? How do I convert my entire ....
2 votes
1 answer
410 views

Downloading only one band in Google Earth Engine without the RGB bands

I have calculted the NDVI of specific plot and download it in order to run analysis in QGIS. The image on GEE had only one band: the calculted NDVI, but whenever I open it on QGIS I have 4 bands: NDVI ...
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0 votes
2 answers
814 views

Exporting RGB values using ArcGIS Desktop?

I am working in ArcGIS 10.6 Desktop. I have several polygon shapefiles where the symbology is set to unique values. The amount of distinct values per shapefile is between 10 and 40. I assigned special ...
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1 vote
1 answer
146 views

Stack 3 layers and display them as one in GEE

I have used this code https://www.gears-lab.com/intro_rs_lab8/ in order to learn and practice my SAR-1 skills. I have created an almost similar code, but few things are not clear to me regard this ...
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3 votes
1 answer
663 views

Detecting and deleting alpha mark in QGIS

I got a couple of 4 band images, band 1-3 is RGB and band 4 is NIR. In the properties it says nothing about an alpha mark, does that mean that none of them is marked as alpha channel or how do I ...
2 votes
1 answer
2k views

Plot RGB using rasterio

When plotting and RGB image using rasterio, I have seen that it is necessary to normalize the values first (0-1) and the use show. I am using the following code for that: def norm(band): band_min,...
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1 vote
0 answers
411 views

Converting uint16 RGB&NIR geotiff image to a uint8 RGB geotiff?

I am trying to convert a uint16 geotiff image with 4 bands (RGB&NIR) with LZW compression to a uint8 geotiff image with 3 bands (RGB) without compression. Here is what I have tried: ...
0 votes
0 answers
205 views

Determining average RGB values of raster layer image inside selected polygon

I have a layer which contains a number of polygons(around 10,000). My work is to check the imagery layer colour inside of that polygon and write a colour in the 'Ceiling_ID' field based on its average ...
0 votes
0 answers
33 views

Seeking high resolution real-color (RGB imagery) dataset?

Specifically interested in the the South Florida region, USA. The aim is to pull up high quality aerials to detect manholes and wellheads from space! These things can typically be half a foot to a ...
1 vote
1 answer
325 views

Can't view RGB image exported to Google Drive from Google Earth Engine

I am trying to export a clipped satellite image from Google Earth Engine's Code Editor. I am able to see the image correctly within code editor, but am unable to open the exported image in Google ...
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1 vote
0 answers
104 views

Hiding NoData values of a raster in MapServer

In a MapServer NoData value pixels can be hide by using the following code inlcusion in a mapfile: `PROCESSING 'BANDS=3,2,1'` Now I have raster with multiple combinations of NoData Values other than ...
1 vote
1 answer
222 views

Using NDVI along with regular RGB and NIR bands for image classification

Is it plausible to use NDVI along with other regular bands for image classification related data processing? Recently, I came across a comment that RED and NIR band might interfere with NDVI or vice ...
0 votes
0 answers
289 views

Adding RGB values from a .txt file to a .las file using laspy

I have a text file that has XYZ and RGB values in it. To convert it to .las format i use lfile = laspy.file.File(r"D:\las\tolas.las", mode='w',header=LasHeader(x_scale=0.01,y_scale=0.01,z_scale=0.01))...
1 vote
1 answer
163 views

Exporting RGB values from raster to file that can be processed in Excel using ArcGIS Desktop?

I have a 3 band raster file with RGB values (the Black Marble night time imagery from NASA). I want to get these values out and into excel so that I can plot them and hopefully see some sort of ...
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0 votes
1 answer
156 views

Displaying composite raster in colors other than RGB in ArcMap?

I have a composite raster file with three bands in ArcMap 10.1. I am trying to display them in colors different than standard RGB. For example, I want band one to be blue, band two be brown and band ...
1 vote
1 answer
391 views

Problem creating a GeoTIFF with RGB splitting image - R

I've like to split a RGB raster in multiple pieces and save each image in GeoTiff format, but in the file name I need the count of points (pts) inside each piece. My code runs perfectly when I used a ...
1 vote
1 answer
316 views

QGIS 3 - Polygon symbology RGB based on different columns

I want to symbolize several values from one layer using R, G, and B values. So, column 1 would be the blue aspect, from 0-255 based on min and max values, column 2 would be green, and column 3 would ...
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0 votes
0 answers
105 views

No data values after raster export (force RGB)

I have a problem when I export a raster (DEM here after). I use the same parameters as the original with "Use renderer" and "Force RGB". But the RGB contains no data values. And obviously, I don't ...
2 votes
2 answers
406 views

Commandline tool to change RGB value of GeoTIFF

I would like to change the rgb-value of raster-tiffs from 0,0,0 to 1,1,1. Is there a commandline-tool that can change the rgb-values of GeoTIFF files? At the moment I use irfanview to change the ...