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Colour change after resampling

thokle

thokle

Messages
137
Country
germany
Hi guys,

I get some really strange colour changes after editing my bmp file in Photoshop and putting it in the resampler.

How it looks in TmfViewer:

tmf8oszx.png


How it looks in Photoshop:

pstls7k.png


What I tried so far:

-setting NullValue to 255,255,255 in the inf
-replacing the colour

If I put the raw, unedited image in the resampler, there aren't any problems. However I'd like to change the brightness and the contrast of my satellite image.

Thanks in advance!
 
What's the compression quality?

Looks like it's averaging the colour difference to reduce file size
 
Here is my inf file. Should I try 100?

[Source]
Type = MultiSource
NumberOfSources = 3

[Source1]
Type = BMP
Layer = Imagery
SourceDir = "."
SourceFile = "Nosy Iranja.bmp"
Variation = January, February, March, April, May, June, July, August, September, October, November, December
Channel_BlendMask = 2.0
Channel_LandWaterMask = 3.0
ulyMap = -13.5730880498886
ulxMap = 47.7737179398537
xDim = 2.473053113321408e-6
yDim = 2.909275452183726e-6

[Source2]
Type = BMP
Layer = None
SourceDir = "."
SourceFile = "Nosy Iranja Blendmask.bmp"
SamplingMethod = Gaussian
ulyMap = -13.5730880498886
ulxMap = 47.7737179398537
xDim = 2.473053113321408e-6
yDim = 2.909275452183726e-6

[Source3]
Type = BMP
Layer = None
SourceDir = "."
SourceFile = "Nosy Iranja Watermask.bmp"
SamplingMethod = Gaussian
ulyMap = -13.5730880498886
ulxMap = 47.7737179398537
xDim = 2.473053113321408e-6
yDim = 2.909275452183726e-6

[Destination]
DestDir = "."
DestBaseFileName = "Nosy_Iranja_Photo"
DestFileType = BGL
LOD = Auto
UseSourceDimensions = 1
CompressionQuality = 90
 
Hi there,

In my experience this happens in the vicinity of pixels that are fully saturated (=255) in one or more bands. Thus, I use the Levels or Curves tool in Photoshop to clip the max pixel value to 254 or even 250, depending on the image.

Cheers, Holger
 
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