def alt(bin_lid):
tmp = mkdirs(scratch(bin_lid))
csv_filename = os.path.join(tmp,bin_lid+'_alt.csv')
logging.info('listing images for %s' % bin_lid)
imagenames = [remove_extension(i) for i in list_images(bin_lid)]
logging.info('looking for existing altitude data...')
already_done = []
if os.path.exists(csv_filename):
for row in read_csv(LocalFileSource(csv_filename)):
already_done += [remove_extension(row[0])]
logging.info('found %d existing altitude records' % len(already_done))
if len(already_done) == -1:
logging.info('emptying CSV file ...')
with open(csv_filename,'w') as csv_out:
pass
pids = []
for n in range(NUM_PROCS):
pid = os.fork()
if pid == 0:
for imagename in imagenames[n::NUM_PROCS]:
if imagename not in already_done:
tif = img_as_float(read_image(imagename+'.tif'))
logging.info('[%d] START aligning %s' % (n, imagename))
x,y,m = stereo2altitude(tif)
line = '%s,%d,%d,%.2f' % (imagename,x,y,m)
logging.info('[%d] DONE aligned %s' % (n, line))
with open(csv_filename,'a') as csv_out:
print >>csv_out, line
csv_out.flush()
os._exit(0)
else:
logging.info('spawned process %d' % pid)
pids += [pid]
for pid in pids:
logging.info('waiting for process %d' % pid)
os.waitpid(pid,0)
logging.info('joined alignment process %d' % pid)
# now sort file
logging.info('sorting CSV data...')
rows = list(read_csv(LocalFileSource(csv_filename)))
rows = sorted(rows, key=lambda r: r[0])
csv_out = csv_filename # same as in
with open(csv_out,'w') as co:
for row in rows:
print >>co, ','.join([row[n] for n in range(4)])
logging.info('wrote CSV data to %s' % csv_out)
def compute_alt(cfa_LR_path):
""" given the path to a RAW 16-bit 1stereo pair, compute the altitude """
cfa_LR = img_as_float(imread(cfa_LR_path,plugin='freeimage'))
x,y,alt = stereo2altitude(cfa_LR)
return x,y,alt
def stereo2altitude(cfa_LR,config={}):
cfa_LR = read_image(cfa_LR,plugin='freeimage')
(x,y,m) = altitude.stereo2altitude(cfa_LR)
print 'altitude = (%d,%d,%.2f)' % (x,y,m) # FIXME debug
return (x,y,m)
