scale

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Name

scale - linear scaling of pixel values

Syntax

 #include <xite/arithmetic.h>

 int scale( IBAND input, IBAND output,
    double Scale, double offset );

Description

scale scales the input band into the output band: 

 output(x,y) = Scale*input(x,y) + offset

Only the largest rectangle common to the two bands is scaled.

Accepts all pixeltypes except the sub-byte types. input and output must have the same pixeltype, otherwise use convertBiff.

If the result is outside the domain of the actual pixeltype, the nearest possible value is returned.

Identical arguments for input and output are allowed.

Return value

 0 => ok
 1 => bad or different pixel types

See also

convertBand(3)

Author

Tor Lønnestad, BLAB, Ifi, UiO

Id

$Id: scale.c,v 1.36 1997/05/27 12:36:42 svein Exp $