Also produce a scaled down version of the logo.

doc/logo/Makefile

@@ -4,6 +4,7 @@ logo: green_orange_snake.png snake_logo.svg
 	inkscape --export-png=scikits_image_logo.png --export-dpi=100 \
 		     --export-area-drawing --export-background-opacity=1 \
 			 snake_logo.svg
+	python shrink_logo.py
 
 green_orange_snake.png:
 	python scikits_image_logo.py --no-plot

doc/logo/shrink_logo.py

@@ -0,0 +1,16 @@
+from scikits.image import io, transform
+
+s = 0.7
+
+img = io.imread('scikits_image_logo.png')
+h, w, c = img.shape
+
+print "\nScaling down logo by %.1fx..." % s
+
+img = transform.homography(img, [[s, 0, 0],
+                                 [0, s, 0],
+                                 [0, 0, 1]],
+                           output_shape=(int(h*s), int(w*s), 4),
+                           order=3)
+
+io.imsave('scikits_image_logo_small.png', img)