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+.TH BLIND-SET-SATURATION 1 blind
+.SH NAME
+blind-set-saturation - Multiply the saturation of a video
+.SH SYNOPSIS
+.B blind-set-saturation
+[-w]
+.I saturation-stream
+.SH DESCRIPTION
+.B blind-set-saturation
+reads a video from stdin and a mask video from
+.IR saturation-stream .
+The video is printed to stdout, with the saturation
+of each pixel multiplied by the product of the
+luminosity and the alpha value of the corresponding
+pixel and frame in the mask video.
+.P
+If stdin is longer than
+.IR saturation-stream ,
+the remainder or stdin is printed without any changes.
+If stdin is shorter than
+.IR saturation-stream ,
+the remainder of
+.I saturation-stream
+is ignored but may be partially read.
+.SH OPTIONS
+.TP
+.B -w
+Instead of using CIE Standard Illuminant D65 as the
+whitepoint, use the X and Z from each pixel in
+.I saturation-stream
+for the whitepoint.
+.SH AUTHORS
+Mattias Andree
+.RI < maandree@kth.se >