Ranger provides an INI option that you can use to set the preference on UV image type. The option is located in a file called CapiOptions.ini.
This article will help you find the INI file on your operating system:
Where are the Ranger INI files located? (http://www.sbulletsupport.com/forum/index.php?topic=51.0)
Here is the option that you can change...
[Image.UV]
// COMPRESSIONTYPE
// 9 = CCITT Group 4 Ultraviolet
// 10 = CCITT Group 4 Ultraviolet Inverted
// 11 = JPEG Ultraviolet
// 12 = JPEG Ultraviolet Inverted
// The default is 10.
COMPRESSIONTYPE=10
In the following example we will set the option to 12 for "JPEG Ultraviolet Inverted".
You can set this value by calling Ranger.SetDriverOption("Image.UV", "COMPRESSIONTYPE", "12");
Ranger reads this option's value when you call Ranger.EnableOptions().
IF you want a higher resolution UV image you can set the following options. Setting "TREATSNIPPETASIMAGE=1" will overwrite the [Image.UV] settings.
[Image.UIMFRONTIMG3]
//
// COMPRESSIONTYPE
// 0 = Disabled
// 5 = Full Resolution JPEG
// 15 = Full Resolution JPEG Ultraviolet
// 16 = Full Resolution JPEG Ultraviolet Inverted
// The default is 0.
COMPRESSIONTYPE=15
//TREATSNIPPETASIMAGE
// 0 = Snippet is obtained via passthrough calls (default).
//
// 1 = COMPRESSIONTYPE will determine in
// which image buffer the snippet will be stored.
// 5 - Snippet will be stored in GS buffer
// 15-16 Snippet will be stored in UV buffer.
//The default is 0.
TREATSNIPPETASIMAGE=1