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conncomp.plot_bridge(): improve memory usage #1155

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merged 6 commits into from
Mar 20, 2024
Merged

conncomp.plot_bridge(): improve memory usage #1155

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fcce092
improve memory usage by avoiding creating separate mask arrays
ehavazli Mar 7, 2024
9644873
Merge branch 'insarlab:main' into master
ehavazli Mar 12, 2024
a4d23ef
mask out unused pixels
ehavazli Mar 19, 2024
b97ca06
more comments
yunjunz Mar 20, 2024
4cc04a5
Update conncomp.py
yunjunz Mar 20, 2024
254f2b5
Update conncomp.py
yunjunz Mar 20, 2024
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16 changes: 10 additions & 6 deletions src/mintpy/objects/conncomp.py
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Original file line number Diff line number Diff line change
Expand Up @@ -355,21 +355,25 @@ def unwrap_conn_comp(self, unw, radius=50, ramp_type=None, print_msg=False):


def plot_bridge(self, ax, cmap='jet', radius=50):
# label background
# background label
ax.imshow(self.labelImg, cmap=cmap, interpolation='nearest')
# bridges

for bridge in self.bridges:
# bridges
ax.plot([bridge['x0'], bridge['x1']],
[bridge['y0'], bridge['y1']], 'w-', lw=1)

# endpoint window
if radius > 0:
aoi_mask0, aoi_mask1 = self.get_bridge_endpoint_aoi_mask(bridge, radius=radius)
label_mask0 = self.labelImg == bridge['label0']
label_mask1 = self.labelImg == bridge['label1']
mask0 = np.ma.masked_where(~(aoi_mask0*label_mask0), np.zeros(self.labelImg.shape))
mask1 = np.ma.masked_where(~(aoi_mask1*label_mask1), np.zeros(self.labelImg.shape))
ax.imshow(mask0, cmap='gray', alpha=0.3, vmin=0, vmax=1)
ax.imshow(mask1, cmap='gray', alpha=0.3, vmin=0, vmax=1)
# Note by Emre Mar 2024: overlay bridge regions directly using plot() function,
# instead of using np.ma.masked_where() with imshow(),
# to save memory while calling this func in a loop (https://github.com/insarlab/MintPy/pull/1155)
ax.plot(np.nonzero(aoi_mask0*label_mask0)[1], np.nonzero(aoi_mask0*label_mask0)[0], 'gray', alpha=0.3)
ax.plot(np.nonzero(aoi_mask1*label_mask1)[1], np.nonzero(aoi_mask1*label_mask1)[0], 'gray', alpha=0.3)

# reference pixel
ax.plot(self.refX, self.refY, 'ks', ms=2)
return ax
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