Questions tagged [rgb]

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

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14 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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0answers
14 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 ...
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1answer
25 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 ...
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15 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))...
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1answer
36 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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1answer
23 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 ...
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1answer
53 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 ...
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1answer
26 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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0answers
18 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 ...
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2answers
38 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 ...
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0answers
20 views

RGB image file to Y'CbCr and other Luma+Chroma Representations

is it possible using QGIS on windows to convert an RGB image file to Y'CbCr and other Luma+Chroma Representations format. I've seen various formulas for this written in MATLAB and R. I am looking to ...
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89 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 ...
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37 views

GeoTIFF pixel value interpretation

I'm currently working with a GeoTIFF file of a RapidEye image, which I'm reading in using GDAL. When I read in the RGB bands (which I believe are the 1-3 bands), I get values uint16 values that doesn'...
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1answer
173 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 ...
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1answer
338 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 ...
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1answer
62 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 ...
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1answer
126 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 ...
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2answers
438 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 ...
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1answer
229 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 ...
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0answers
29 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 ...
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0answers
126 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 ...
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2answers
115 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 ...
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0answers
50 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 ...
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4answers
1k 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 ...
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0answers
148 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 ...
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1answer
2k 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 ...
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3answers
546 views

Why does my rainbow airplane stripes appearing on Sentinel 2 image?

I have downloaded a Sentinel-2 scene and there are some interesting rainbow like stripes trailing an airplane. This is an rgb image but the stripes are also visible on the other bands. You can tell it ...
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1answer
78 views

Is it possible for Orfeo toolbox to do auto object identification on a 3band RGB raster image?

My intention of using Orfeo Toolbox is to find all the open air basketball courts on a raster image with 3 bands RGB. Does OTB require a multi spectral band image or is 3 band image good enough to ...
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1answer
223 views

What's the default histogram manipulation of QGIS for displaying RGB images?

When you open an RGB geotiff (e.g. bands 4-3-2 of Sentinel-2) as raster dataset in QGIS - what histogram manipulation is applied by default? Of course I can look at the min-/max-values, but I'd like ...
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1answer
53 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 ...
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2answers
1k 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, ...
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3answers
3k views

Raw Sentinel 2 jp2 to RGB geotiff

I'm looking for a way to merge Sentinel 2 jp2 band files(B02, B03, B04) and fix RGB colors. All should be done with bash or python script. For my example I work on these images. Ideally the solution ...
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0answers
383 views

Plot RGB raster on basemap in R

I want to plot my RGB raster on a basemap in R. So far I have a RasterStack object and I have downloaded the basemap with ggmap. I can plot them individually but not together. stack_rrs <- stack(...
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0answers
232 views

Reprojecting xyz rgb file in QGIS?

I am trying to reproject an XYZ RGB point cloud file that I got from a drone mapping software. It is now in WGS84 and I want it in euref32(UTM) or just a local metric system so i can import it Into an ...
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0answers
150 views

ENVI shows colors of different RGB code the same in a bitmap image wrongly?

As you see in this picture which I've captured in MATLAB, there are two colors. Red with the RGB code (255,0,0) Brown with the RGB code (138,139,1) I've tried to show the same picture in ENVI, ...
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1answer
154 views

PyQGIS: apply a graduated renderer with RGB

I'm trying to apply a graduated renderer on a point layer. I found this code here (the first in the solution) and slightly modified it to my project. It seem's to work beautifully (in the layer ...
2
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1answer
5k views

How to create an rgb GeoTIFF file raster from bands using the GDAL python module?

I'm trying to create a new raster from three bands (rgb). I got the script mostly from here. I can create a single band raster with no problems, but I'm having trouble inputting a tree band numpy ...
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0answers
108 views

How to clip a RGBA raster with another single band raster using QGIS or GDAL

I have a RGBA raster and I would like to set all the data over the continents to transparent. I have a single band raster where land is equal to 0 and ocean is equal to 1. Normally if I had a single ...
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1answer
451 views

Export RGB data (from a tiff image) in excel format

I have a tiff file having 3 bands R, G, B. I used the following program in R to obtain the pixel values for each band separately. r<- raster("lena.tiff", band = 1) writeRaster(r, filename = "...
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0answers
130 views

Add RGB values from CPT file to Int16 GeoTIFF using Python and Gdal

I want to add color, using RGB values stored in a CPT file, to a black and white Int16 GeoTIFF file using Python. I tried to use SetColorEntry(), but when I add the ColorTable to the RasterBand, I ...
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0answers
482 views

Plotting shapefiles with Pyshp in Python omits some shapes

I want to plot a cloropleth map of Scotland with Pyshp, but only a fraction of the shapes are plotted. The shapefile of Scotland has 32 shapes, and it is available here. The values dictating the ...
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0answers
495 views

Pansharpen Landsat 7 RGB using gdal_pansharpen.py

Is it possible to pansharpen Landsat 7 RGB band combination (without NIR) to have approximately the same intensities as the original RGB image with gdal_pansharpen.py (weighted Brovey algorithm)? What ...
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1answer
341 views

QGIS PCT to RGB Attribute Error [closed]

I want to run this script, but it always gives me this error message: Traceback (most recent call last): File "C:\PROGRA~1\QGIS21~1.1\bin\pct2rgb.py", line 121, in ct_size = ct.GetCount() ...
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1answer
1k views

Using RGB values stored in field of feature class to apply colour component for ArcGIS Pro symbology?

Symbolizing using RGB values from Excel in ArcGIS Desktop? and Symbolizing vector features using RGB values stored in three fields using ArcPy? are questions that distil to whether it is possible to ...
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1answer
3k views

get rgb images from sentinel-2 using gdal

i have some troubles to get RGB true colors image from sentinel satellite bands wich produce this to me it looks not natural at all also i have tried gdal to do the merge with : gdal_merge -o ...
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1answer
2k views

Displaying LiDAR data with RGB values in ArcGIS Desktop?

I have been able to display LiDAR data with RGB values out of aerial photos with SAFE FME and also POTREE. Is there any way to do this with ArcGIS 10.3?
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2answers
1k views

Extracting RGB values from aerial photo and assigning to LAS file with FME?

I need to extract the RGB Values from imagery and assign to a .las file in order to display 3d landscape with "real" colours. I have an unlicenced LAStools, FME 2017 and ArcGIS 10.3.1 at hand. I ...
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1answer
89 views

Creating composite band

I have land cover rasta data for the years 2000, 2010 and 2014. I would like to get the NDVI for each of the year. I have to generate the RGB first. I have tried the following things: 1. layer -> ...
4
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2answers
320 views

How to reduce number of raster bands of a RGB picture?

For my Master Thesis in Ecology I want to calculate an NDVI Index. The tricky part is, that I don't have sattelite pictures with bands and so on, but RGB pictures. The pictures where taken with a ...
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1answer
366 views

Applying symbology to raster layer in ArcPy without using symbology layer (layer file)?

I have a raster layer with 3 unique values (1,2,3) and I want to apply a unique color to each using RGB values or hex codes, without the use of a symbology layer (layer file). Is it possible to ...