I am using GDAL (gdal_merge) to put together some landsat photos using the proper bands. When I open the GeoTIFF that is created using gdal_merge (in Windows), the GeoTIFF is super dark. Now, when I open the same GeoTIFF in ArcMap, it's nice and bright and realistic looking. I was wondering if there was a function in GDAL that would allow me to do what ArcMap is doing. I have tried using PIL (in python) to enhance the brightness, contrast, and color - and I have had some success, but certainly it's not as nice as what ArcMap is doing.
Does anyone have any ideas? Just in case you are wondering, the gdal_merge command is as follows
gdal_merge.py -separate -ps 16 16 -co PHOTOMETRIC=RGB -o "merged_new.tif" "LC08_L1TP_046029_20180717_20180717_01_RT_b4.tif" "LC08_L1TP_046029_20180717_20180717_01_RT_b3.tif" "LC08_L1TP_046029_20180717_20180717_01_RT_b2.tif"
But I don't think the gdal_merge command is an issue, as I am opening the result of gdal_merge with arcmap and it looks nice.