Questions tagged [rgb]

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

Filter by
Sorted by
Tagged with
0
votes
0answers
10 views

Add Color Map to MrSID Imagery

I am trying to convert a single band (grey) MrSid image to a 3 band (RGB) GeoTiff image. Using QGIS (3.12.3-București) on Windows 7, I saved it as a GeoTiff, which now has the 3 standard bands. Each ...
0
votes
0answers
27 views

Clipping Raster with shapefile boundary using QGIS

I have quastion about Clip Raster with shapefile boundary in QGIS 3. I would like to receive 'No data' value in places out of the polygon, but as a result of cliping is 0,0,0. I can't defines a value ...
0
votes
1answer
17 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?
1
vote
0answers
58 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://...
2
votes
1answer
34 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 ...
1
vote
0answers
31 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 ...
1
vote
0answers
51 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 ...
1
vote
1answer
122 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 ...
1
vote
1answer
52 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
1answer
22 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 ...
1
vote
0answers
62 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
1answer
81 views

How to extract contours from .jp2 DEM dataset?

This will be a little long-winded but I'm including all information I consider relevant. Problem: I have received a data set from a municipality that is a 3-layer LiDAR JP2 DEM and need to extract ...
1
vote
1answer
115 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 ...
1
vote
1answer
67 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 ...
1
vote
1answer
31 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 ...
0
votes
0answers
23 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.
-1
votes
1answer
199 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
1answer
80 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 ...
0
votes
2answers
177 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 ...
0
votes
0answers
14 views

How to export specific RGB values from rasterimage

QGIS issue here. I have a rasterimage (ECW), and want to export only the stribes from the road to a new rasterfile, even better to a vector from specific RGB numbers. The ECW file is 700 MB, but when ...
1
vote
1answer
56 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 ...
2
votes
1answer
90 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 ...
1
vote
1answer
470 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,...
1
vote
0answers
138 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
0answers
74 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
0answers
28 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
1answer
104 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 ...
1
vote
0answers
33 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
1answer
124 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
0answers
80 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
1answer
96 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 ...
0
votes
1answer
57 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
1answer
201 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
1answer
75 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 ...
0
votes
0answers
43 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
2answers
170 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 ...
0
votes
0answers
449 views

How read a raster [Tiff] file to get the correct values for every band? [duplicate]

I am trying to read a raster tiff [RGBA] file with GDAL in [C++], I can load the file, get the number of channels, the size of the bands and the metadata, but when I try to extract the Band [R, G or ...
5
votes
1answer
311 views

RGB TIFF goes black when zoomed out in QGIS?

Am importing a RGB TIFF into QGIS 3.4 and when I zoom in I can see the image properly, however, when I zoom out the layer turns black (most of it) and red (a small portion). After doing some search I ...
1
vote
1answer
619 views

Get colortable from three-band RGB raster (brick) with R

I have a three band RGB Raster Geotiff. I will provide the sample data below, but I'm guessing my problem should be solvable generically. I would like to turn this three band raster into a single band ...
2
votes
1answer
175 views

ERDAS Imagine signature picker colour changing RGB numbers?

I've noticed something with the signature picker in ERDAS and I was wondering if it is a bug or a feature. When I create classes I assign a colour to make them easily readable in the classified ...
1
vote
1answer
304 views

Load a SAGA RGB composite in QGIS

I have created a RGB composite in SAGA GIS using the RGB composite tool. A one band raster is created, which can be visualised in SAGA using the option RGB coded values. When I try to import this ...
1
vote
2answers
1k views

Adding RGB values to Laspy synthetic point generation?

What is the correct way to add RGB values to points made from scratch? Laspy is working great for me so far. I want to add RGB values to synthetic points that I've generated. I am using 2 numpy ...
3
votes
1answer
408 views

Changing default color palette from RGB to CMYK in ArcMap?

Is there a way to change the default colour palette in ArcMap? Currently, for each symbol, I have to change RGB to CMYK to choose my colour (see screenshot). This is pretty annoying since all my ...
1
vote
0answers
32 views

Light normalization of Orthophotos to increase comparability

I would like to work with the RGB-values of different orthophotos. Now I noticed that the light conditions are not the same in the different orthophotos. I was wondering if there is a sound way to ...
2
votes
0answers
219 views

Converting 8-bit RGB tif to single gray-scale image

I have a tif image of soil thorium content (ppm) measured by gamma aerial spectroscopy. The original file is a 8 bit RGB image set in a rainbow-similiar pallet (blue>green>yellow>red>magenta). I have ...
2
votes
2answers
171 views

generate vector lines of planting from a raster uav image

I have a high quality drone image and I want to generate the planting line from raster. I will transform rgb to false ndvi or others index. The vector lines must go through the green areas of the ...
2
votes
0answers
54 views

Display final desired color with RGB + transparent grey hillshade

In QGIS 2.18.16, I am trying to end up with a final desired color specified in RGB (from a style branding book of a client). The map also contains a hillshade with some transparent grey over top of ...
1
vote
4answers
2k views

Splitting RGB image into separate bands using Drone (DJI Phantom imagery)

Previously I have made marine habitat maps using multiband imagery and remote sensing techniques (e.g blue, green and red bands from satellite imagery). I am now attempting the same process however ...
1
vote
0answers
167 views

Changing raster display in QGIS to look same as ArcGIS Desktop?

I have a strange problem. I have noticed that the same satelite imagery looks totally different in QGIS and ArcGIS. The problem is that I need to get the same style in QGIS. I've tried to calculate ...
2
votes
1answer
4k views

Landsat True color in QGIS [duplicate]

I have download the following Landsat 7 image LE07_L1TP_231095_20011014_20170202_01_T1. I want to open a true color RGB composition using bands 1, 2 and 3. For that, I import the Tiff files of the ...