diff --git a/doc/colorize.png b/doc/colorize.png
index 8ab5c5c..df85d43 100644
Binary files a/doc/colorize.png and b/doc/colorize.png differ
diff --git a/doc/emboss.png b/doc/emboss.png
index f5d83fa..9e66117 100644
Binary files a/doc/emboss.png and b/doc/emboss.png differ
diff --git a/doc/warp.png b/doc/warp.png
new file mode 100644
index 0000000..3154d9e
Binary files /dev/null and b/doc/warp.png differ