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

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5
votes
1answer
979 views

How to force RGB in a raster in QGIS?

I have rasters in 1 band 64bits float that represent real data values and for which I can set min and max using the stretch to min and max option in QGIS. I would like to convert these rasters to RGB ...
3
votes
1answer
103 views

Merge RGB band using python

I need to merge the RGB bands of three TIFF images. I'm trying to use a PIL library (Python Imaging Library), but this execution error happens: Traceback (most recent call last): File ...
1
vote
1answer
66 views

How to determine the bands from an aerial image?

I received a set of aerial images taken with a Canon camera, I don´t know which kind of lens it has, or if it has been modified. After performing split image algorithm in Qgis, I get four new files: ...
0
votes
1answer
22 views

How can I create a raster of a color spectrum out of a RGB?

I try to select a colorspectrum out of a RGB-Layer. For example, I have a RGB-picture (tif) of a carpark with red,green and blue cars. How do I select or create a new raster/layer with only the red ...
2
votes
0answers
47 views

How to match the colors of different RGB mosaic rasters?

I am beginner in QGIS. I want to classify many RGB rasters (see picture) but their colors don´t match. As you can see, the green polygon shows the same land cover class (meadow) but in each tile the ...
1
vote
0answers
70 views

GDAL - replacing rgb value (0,0,0) with (nodata,nodata,nodata)

I have a set of rasters in which I want to replace any rgb value of (0,0,0) with (nodata,nodata,nodata) I've tried using gdal_translate -a_nodata "0,0,0" in.tif out.tif But this seems to convert ...
1
vote
0answers
215 views

Extracting color values from layer to build index using ArcPy/ArcMap?

My university wants the maps we create to become more standardized and so we're changing all the colors on our base vector map. The new standard needs to be indexed and I have the task of creating ...
1
vote
0answers
49 views

What can POLYCOLOR mean and is there a way to convert to RGB?

It is not for the first time I found in the tables of some data column called POLYCOLOR. Is there any way to figure out what that means and is it somehow convertible to RGB values? If I get it right ...
0
votes
0answers
18 views

DEM to RGB-GeoTIFF (land-/waterarea colored separate)

I want to create a colored basemap out of a ETOPO dataset. Is there a way to color the land (masked by a landpolygon) and water area separate and combine them later. The result should be one GeoTIFF ...
0
votes
0answers
10 views

How to divide bitmap into differnet layers by RGB color code in MapInfo

I have got bmp file with 7 colors. How to get from this bitmap 7 different vector layers depending on RGB color code? For example first layer is water space with blue color, second is buildings with ...
0
votes
0answers
44 views

Converting RGB to Colormap in ArcMap?

I am using ArcGIS 10.3.1 for Desktop and I have an RGB image. The two dominant bands are red and green thus the scale of the image goes from red[low]-yellow[intermediate]-green[high]. I would like ...
0
votes
0answers
43 views

Achieving consistent RGB Composite Settings using ArcPy?

Does anyone know if there is an arcpy tool so that when I bring in raster imagery (Specifically Landsat) into ArcMap it will automatically adjust the settings of the RGB composite? I know under ...
0
votes
0answers
52 views

How to transform ENVI Hdr to PNG using GDAL?

I am trying to transform a ENVI Hdr image into a PNG (or other RGB image format) in order to visualize this image. I am selecting the three default bands (55, 41, and 12). I am using GDAL by using ...
0
votes
0answers
486 views

Raster to polygon with RGB composite using Arcgis

I am trying to convert an RGB composite to a shapefile to use with. The raster to polygon function returns with three shapefiles with "grid_code" of the value of each of these three channels. I am ...
0
votes
0answers
128 views

How to change area inside mask to different RGB Value in ECW Format with FME

I have 3 Band RGB ECW Raster files and would like to change all the RGB values within the masked area to 0,0,0. I am using the SpatialFilter to set the masking area and thought that I could use the ...