WARNING! Rabbit Hole ahead!!!
No buttons. No GUI. I'd suggest starting with OpenEV to get familiar with it. The routine you would use is gdal_translate. The format is as follows: The usage format would be gdal_translate <source file [alpha.img]> <destination file [alph.tif]>. Multiple source and destination files could be used. For a large amount of files I would write a batch file that would call the file names.
C:\Program Files (x86)\FWTools2.4.7>gdal_translate
Usage: gdal_translate [--help-general]
[-ot {Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/
CInt16/CInt32/CFloat32/CFloat64}] [-strict]
[-of format] [-b band] [-expand {gray|rgb|rgba}]
[-outsize xsize[%] ysize[%]]
[-unscale] [-scale [src_min src_max [dst_min dst_max]]]
[-srcwin xoff yoff xsize ysize] [-projwin ulx uly lrx lry]
[-a_srs srs_def] [-a_ullr ulx uly lrx lry] [-a_nodata value]
[-gcp pixel line easting northing [elevation]]*
[-mo "META-TAG=VALUE"]* [-q] [-sds]
[-co "NAME=VALUE"]*
src_dataset dst_dataset
GDAL 1.7.0b2, FWTools 2.4.7, released 2010/01/19
The following format drivers are configured and support output:
VRT: Virtual Raster
GTiff: GeoTIFF
NITF: National Imagery Transmission Format
HFA: Erdas Imagine Images (.img)
ELAS: ELAS
AAIGrid: Arc/Info ASCII Grid
DTED: DTED Elevation Raster
PNG: Portable Network Graphics
JPEG: JPEG JFIF
MEM: In Memory Raster
GIF: Graphics Interchange Format (.gif)
XPM: X11 PixMap Format
BMP: MS Windows Device Independent Bitmap
PCIDSK: PCIDSK Database File
PCRaster: PCRaster Raster File
ILWIS: ILWIS Raster Map
SGI: SGI Image File Format 1.0
SRTMHGT: SRTMHGT File Format
Leveller: Leveller heightfield
Terragen: Terragen heightfield
GMT: GMT NetCDF Grid Format
netCDF: Network Common Data Format
HDF4Image: HDF4 Dataset
ERS: ERMapper .ers Labelled
ECW: ERMapper Compressed Wavelets
JP2ECW: ERMapper JPEG2000
FIT: FIT Image
RMF: Raster Matrix Format
RST: Idrisi Raster A.1
INGR: Intergraph Raster
GSAG: Golden Software ASCII Grid (.grd)
GSBG: Golden Software Binary Grid (.grd)
R: R Object Data Store
PNM: Portable Pixmap Format (netpbm)
ENVI: ENVI .hdr Labelled
EHdr: ESRI .hdr Labelled
PAux: PCI .aux Labelled
MFF: Vexcel MFF Raster
MFF2: Vexcel MFF2 (HKV) Raster
BT: VTP .bt (Binary Terrain) 1.3 Format
IDA: Image Data and Analysis
USGSDEM: USGS Optional ASCII DEM (and CDED)
ADRG: ARC Digitized Raster Graphics
BLX: Magellan topo (.blx)
Rasterlite: Rasterlite
SAGA: SAGA GIS Binary Grid (.sdat)
Allen Jessup
CAD Manager - Designer
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