.TH LERP 9.1
.SH NAME
lerp \- linear combinations of images
.SH SYNOPSIS
.B fb/lerp
.I file fraction ...
[
.I file
]
.SH DESCRIPTION
.I Lerp
computes a linear combination of a number of input images.
Each input file name is followed by a floating-point
fraction by which to scale its pixel values.
The fraction after the last image may be omitted, in which case one minus the sum
of the other fractions is used.
The result image is written to standard output.
.PP
Nothing prevents the fractions from being smaller than zero or larger than one.
Output pixel values that fall below zero or above 255 are clamped.
.SH "SEE ALSO
.IR picfile (9.6)
