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Avoid temporary array allocations

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Johannes Schönberger
2013-12-09 07:52:08 +01:00
parent d8b343e430
commit 8ae8548dfd
1 changed files with 4 additions and 1 deletions
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skimage/feature/template.py
+4 -1
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@@ -139,7 +139,10 @@ def match_template(image, template, pad_input=False, mode='constant',
nom = xcorr - image_window_sum * (template.sum() / template_volume)
denom = image_window_sum2 - image_window_sum**2 / template_volume
denom = image_window_sum2
np.multiply(image_window_sum, image_window_sum, out=image_window_sum)
np.divide(image_window_sum, template_volume, out=image_window_sum)
denom -= image_window_sum
denom *= template_ssd
np.maximum(denom, 0, out=denom) # sqrt of negative number not allowed
np.sqrt(denom, out=denom)