46
J.Jensen
EN VI
~l$t¥' I Sp.,.;v.l Tool. I Rc.cw iOGb I ~ TrltM f ~t."" I ~
250
200
i
!
o :
.1 sp.ctra l Profile
1 S. c1ral Profile
Fig 3.3. ENVI's graphical user interface allows complex operations to be applied to hyperspectral data. Here, the cursor is located on a clay capped waste unit on the Savannah River Site. The
three bands used to make the color composite (shown here in black and white) are depicted as
bars in the spectral profile plot. The spectral reflectance curve at the cursor location is displayed
in the spectral profile plot. This dataset consisted of 88 bands of lOx 10m TRWIS hyperspectral
data
CPUs can address more RAM than 32-bit machines, etc. Figure 3.1 depicts individual workstations with 64 to 128 MB of RAM and a server with 256 MB of
RAM. One can never have too much RAM for image processing applications.
Fortunately, RAM prices continue to decline.
3.1.4 Operating System and Software Compilers
The operating system is the master control program that runs the computer. It is
the first program loaded into memory (RAM) when the computer is turned on, and
its main part, called the kernel, resides in memory at all times (Freedman, 1995).
The operating system sets the standards for the image processing application programs that are executed by it. All programs must 'talk to' the operating system.
The difference between an operating system and a network operating system is its
multi-user capability. DOS, Windows 98, and Macintosh OS are single-user operating systems designed for one person at a desktop computer. Windows NT and
UNIX are network operating systems because they are designed to manage multiple user requests at the same time and handle the related security. The operating
system provides the user interface and controls multi-tasking. It handles the input
and output to the disk and all peripheral devices such as printers, plotters, and
color displays.
A compiler is the software that translates a high-level programming language
such as C or FORTRAN into machine language. A compiler usually generates
assembly language first and then translates the assembly language into machine
J.Jensen
EN VI
~l$t¥' I Sp.,.;v.l Tool. I Rc.cw iOGb I ~ TrltM f ~t."" I ~
250
200
i
!
o :
.1 sp.ctra l Profile
1 S. c1ral Profile
Fig 3.3. ENVI's graphical user interface allows complex operations to be applied to hyperspectral data. Here, the cursor is located on a clay capped waste unit on the Savannah River Site. The
three bands used to make the color composite (shown here in black and white) are depicted as
bars in the spectral profile plot. The spectral reflectance curve at the cursor location is displayed
in the spectral profile plot. This dataset consisted of 88 bands of lOx 10m TRWIS hyperspectral
data
CPUs can address more RAM than 32-bit machines, etc. Figure 3.1 depicts individual workstations with 64 to 128 MB of RAM and a server with 256 MB of
RAM. One can never have too much RAM for image processing applications.
Fortunately, RAM prices continue to decline.
3.1.4 Operating System and Software Compilers
The operating system is the master control program that runs the computer. It is
the first program loaded into memory (RAM) when the computer is turned on, and
its main part, called the kernel, resides in memory at all times (Freedman, 1995).
The operating system sets the standards for the image processing application programs that are executed by it. All programs must 'talk to' the operating system.
The difference between an operating system and a network operating system is its
multi-user capability. DOS, Windows 98, and Macintosh OS are single-user operating systems designed for one person at a desktop computer. Windows NT and
UNIX are network operating systems because they are designed to manage multiple user requests at the same time and handle the related security. The operating
system provides the user interface and controls multi-tasking. It handles the input
and output to the disk and all peripheral devices such as printers, plotters, and
color displays.
A compiler is the software that translates a high-level programming language
such as C or FORTRAN into machine language. A compiler usually generates
assembly language first and then translates the assembly language into machine