Author: Hakan Ardo <[email protected]>
Branch: extradoc
Changeset: r3892:ecee1e7f08e1
Date: 2011-08-26 09:01 +0200
http://bitbucket.org/pypy/extradoc/changeset/ecee1e7f08e1/
Log: local max
diff --git a/talk/iwtc11/benchmarks/image/numpy_compare.py
b/talk/iwtc11/benchmarks/image/numpy_compare.py
--- a/talk/iwtc11/benchmarks/image/numpy_compare.py
+++ b/talk/iwtc11/benchmarks/image/numpy_compare.py
@@ -212,6 +212,39 @@
######################################################################
+def range2d(a, b):
+ for y in range(a, b):
+ for x in range(a, b):
+ yield x, y
+
+def local_max(img): # pypy: 4.72 fps, cpython: 0.31 fps
+ s = 3
+ out = img.new()
+ for x, y in img.pixels(border=s):
+ for dx, dy in range2d(-s, s+1):
+ if img[x+dx, y+dy] > img[x, y]:
+ break
+ else:
+ out[x, y] = 255
+ return out
+
+def local_edge(img): # pypy: 10.25 fps, cpython: 0.25 fps (including
sobel_magnitude)
+ out = img.new()
+ for x, y in img.pixels(border=1):
+ n = len([1 for dx, dy in range2d(-1, 2) if img[x+dx, y+dy] > img[x,
y]])
+ if n <= 3 and img[x,y] > 20:
+ out[x, y] = 255
+ return out
+
+# Haar detector
+# Tracing linesegments
+# Subpixel edge-detection
+# Distance-transform
+# Subpixel correlation/edge-detection
+
+######################################################################
+
+
def mplayer(Image, fn='tv://', options=''):
f = os.popen('mplayer -really-quiet -noframedrop ' + options + ' '
'-vo yuv4mpeg:file=/dev/stdout 2>/dev/null </dev/null ' + fn)
@@ -266,6 +299,8 @@
#view(sobel_magnitude_numpy(img))
#view(magnify(img))
#view(magnify_numpy(img))
+ #view(local_max(img))
+ view(local_edge(sobel_magnitude(img)))
print 1.0 / (time() - start), 'fps, ', (fcnt-2) / (time() - start0),
'average fps'
start = time()
if fcnt==2:
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