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Resampler BGLs lower res than source file

C

ciae985

Messages
35
Country
australia
I've been running SDK Resampler at 100% compression quality but the resulting BGLs , whilst still quite nice, have lost a noticeable ammount of resolution and clarity from the source bmp images.

I have tried increase the resolution sliders in FSX and find the image is already displaying at max res.

Is this normal ?

Are there any other parameters that can help produce a faithful reproduction of the original ?

Rob
 
It's best to resample your data in GIS software to the LOD settings as defined in the SDK's before running them through the resample tool.

The ideal would be to resize in Photoshop to the final resolution but that can be a more painstaking process.

I found that resampling my ortho's in Global Mapper to 1.2m from 1m before rendering in resample.exe led to much brighter and crisper images in sim.

resample.exe isn't real good at image interpolation.
 
I'm using SBuilder X
Sample of INF :
Type = BMP
Layer = Imagery
SourceDir = "."
SourceFile = "L16X121327X121338Y75882Y75896.BMP"
Variation = Day
Channel_BlendMask = 3.0
NullValue = 255,255,255
SamplingMethod = Gaussian
ulyMap = -27.3180945277778
ulxMap = 153.234558111111
xDim = 1.07288321036051E-05
yDim = 9.53070023148224E-06


[Destination]
DestDir = "."
DestBaseFileName = "PhotoMudIsland2"
DestFileType = BGL
LOD = Auto
UseSourceDimensions = 1
CompressionQuality = 100

SBuilder indicated that the source images were LOD16.

I've been attempting to put a source and compiled image side by side to post but all got a bit hard.

Although doing this exercise , I can can see there is not great loss is resolution - I guess you have to expect somne "loss" in resampling - maybe I'm being too picky.

Probably need a better source material to go further.

Thanks for your replys

Rob
 
Hey is that Mud Island off Brissie?

Hmm, yeah the best results will happen if you can resample the imagery to LOD16 in an external program such as photoshop or global mapper. If an image isn't set to the correct LOD then resample will render it and resize the image, and resample.exe doens't do a good job of that at all.

In fact you can remove gaussian from your .inf file as that is applying a gaussian blur to the image. You're best to get the source image clear and as close to FS LOD settings before running it through resample. If not resample will blur the image, and cause the image contrast and brightness to be all over the place.

I'll see if I can find a 30 trial serial # for you for GM.
 
Last edited:
Yes Filmworks - it is indeed Mud Is off Brisbane, Australia.

Some JPEG attached. I've also down Green Island , St Helena , FIshermans IS , YBBN and Wynnum/Manly. If you're reasonably local I'll burn a CD for you.

Just relooking at the INF file is appears I am at LOD 15 not LOD 16 as SBuilder was suggesting.

I changed "Gaussian" sampling to "Dither" and got about a 10% improvement - BGL file size increased by about this ammount.

Whats the best way to get source closest to FS LOD - do those programs you mentioned give you an indication of degrees per pixel ? I have PaintShop Pro X2- I'll read the help files.

Anyway - your suggestions have definately helped - I'm pretty close to the source image after changing the sampling method.

Thanks

Rob
 
Looks like the attachments are allowed - approx 200k each.
There's always email .

Also I correct what I said about Sbuilder - it displays QMID not LOD so all is good.
 
Hey Rob,

I'm local but in the Philippines right now, am planning on being back in Brissie within the next few months.

If you want I can set up an FTP site for you and I'd be happy to process the images for you and shoot them back to you.

Feel free to email me at fsdreamscapes at yahoo dot com.

Do the images you have include georeferencing tags?

Cheers,
Dean
 
just remove the CompressionQuality = xxx line. Resample.exe then wont apply compression...the resultant bgls will be very big though of course.
 
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