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[phd-thesis.git] / intro / img / Makefile

diff --git a/intro/img/Makefile b/intro/img/Makefile
index 2447e28..74e9bd3 100644 (file)
--- a/intro/img/Makefile
+++ b/intro/img/Makefile
@@ -1,2 +1,4 @@
 %g.jpg: %.jpg
        convert $< -set colorspace Gray -separate -average $@
+%g.png: %.png
+       convert $< -set colorspace Gray -separate -average $@