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-rw-r--r--doc/filters.texi2
1 files changed, 2 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi
index 44d41a87cf..a8d5fb1b4e 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -19105,6 +19105,8 @@ Nearest neighbour.
@item line
@item linear
Bilinear interpolation.
+@item lagrange9
+Lagrange9 interpolation.
@item cube
@item cubic
Bicubic interpolation.