Python 如何将PiCloud与OpenCV结合使用

如何在picloud上使用opencv

这个简单的numpy测试有效

import cloud
import numpy as np
import time

data= np.random.rand(100,4)

t0= time.time()
job_id= cloud.call(np.dot,data,data.T)
cloud.join(job_id)
res= cloud.result(job_id)
print (time.time()-t0)
print res.shape

t0= time.time()
res= np.dot(data,data.T)
print (time.time()-t0)
print res.shape

但事实并非如此

import cv
im= cv.LoadImage("D:\\001_001.tif")

t0= time.time()
job_id= cloud.call(cv.Smooth,im,im)
cloud.join(job_id)
res= cloud.result(job_id)
print (time.time()-t0)

错误

Traceback (most recent call last):
  File "D:\test_cloud.py", line 13,
 in <module>
    cloud.join(job_id)
  File "C:\Python27\lib\site-packages\cloud\cloud.py", line 721, in join
    neededJids = filter_xrange_list(resultFilter, neededJids)
  File "C:\Python27\lib\site-packages\cloud\util\xrange_helper.py", line 167, in
 filter_xrange_list
    if func(elm):
  File "C:\Python27\lib\site-packages\cloud\cloud.py", line 719, in resultFilter

    return filterJob(jid, status) # filter out done jobs; raise exception on err
ored jobs
  File "C:\Python27\lib\site-packages\cloud\cloud.py", line 668, in filterJob
    raise CloudException(exception, jid=jid, status=status, hint=hint)
cloud.cloud.CloudException: Job 8: Fatal Python error: Segmentation fault

Current thread 0x00007f162e1d3720:
  File "/usr/local/picloud/.employee/pimployee/job_util.py", line 136 in process
_job
  File "/usr/local/picloud/.employee/job_task.py", line 74 in <module>

TIP: It looks like your program crashed. If it is not clear how to solve this, p
lease file a support ticket (https://www.picloud.com/accounts/support/).

旧的cvapi使用的是IplImages，而不是numpy数组

而不是：

import cv
im= cv.LoadImage("D:\\001_001.tif")

你应使用：

import cv2
im= cv2.imread("D:\\001_001.tif")

通常避免使用过时的cv模块，它在下一版本的opencv中不可用

import cv2
im= cv2.imread("D:\\001_001.tif")