Question

我对raspberry pi和python都很新。我已经编写了一个分析图像的代码，但我不断发生致命的python错误:( pygame parachute）Segmentation Fault。它通常发生在我的程序中15分钟到一个小时之间。从我所读到的，这通常是某种内存超越问题。我还没有找到能够解决我问题的具体答案。这是我的代码。请帮忙。有没有人对如何修复或调试这个问题有任何建议？

var utcPickedDate = $scope.pickedDate.toUTCString(); //"Thu, 09 Feb 2017 21:33:16 GMT"

我不知道其中的大部分内容，但是如果我在（gdb）中运行程序并进行回溯，我会得到这个......

import cv2
from SimpleCV import Image, Camera
import time
import os
import RPi.GPIO as GPIO

T = 1
z = 0

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(31, GPIO.OUT)
GPIO.setup(32, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

GPIO.output(31,GPIO.HIGH)
cam = Camera(prop_set={'width':320, 'height':240})
while(T):

    w = [0 in range(9)]

    if(GPIO.input(32)):
       start = 80
       pixel = 0
       end = 225
       time.sleep(0.32)
       img = cam.getImage()
       img.save('original.jpg')
       edges = cv2.imread('original.jpg')

       edges = cv2.Canny(edges,90,210)
       print("hola")
       for y in range (100,160):
           i = 0
           first = 0
           temp = 0
           last = 0
           for x in range (start, end):
               pixel = edges[y,x]

               if (pixel >=120 and first == 0):
                   first = x


               if (pixel >=120 and first != 0 and last < x):
                   last = x

           if last != 0:
               temp = last - first
               for x in range(start, end):
                   if ((x <= last) and (x >=first)):
                       edges[y,x] = 140;

       while(GPIO.input(32)):
           pass

今天我发现，如果我所做的只是导入SimpleCV，图像和相机，然后打开相机并进入无限循环，我仍然会出现分段错误

(gdb) bt
#0  0x000835f4 in PyEval_EvalFrameEx ()
#1  0x00081ca4 in PyEval_EvalCodeEx ()
#2  0x000c37c4 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

如果我使用pygame拍摄照片并进行回溯，我会收到更多信息的分段错误

(gdb) bt
#0 0x00087024 in PyEval_EvalFrameEx ()
#1 0x000840cc in PyEval_EvalFrameEx ()
#2 0x000a4520 in ?? ()

我找到了gdb的新功能。我输入信息主题，我得到......

#0  0x0006de50 in PyErr_Format ()
#1  0x70952ee0 in v412_read_frame () from /usr/lib/python2.7/dist-packages/pygame/_camera.so
#2  0x7094ede0 in camera_get_image () from /usr/lib/python2.7/dist-packages/pygame/_camera.so
#3  0x0008360c in PyEval_EvalFrameEx ()
#4  0x00081ca4 in PyEval_EvalCodeEx ()
#5  0x000c37c4 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

然后，如果我输入列表，我会得到这个

 Id   Target ID         Frame
 2    Thread 0x72df9460 (LWP 601) "python2.7" 0x76e3ab80 in poll ()at ../sysdeps/unix/syscall-template.S:81
*1    Thread 0x76ff6000 (LWP 600) "python2.7" 0x0006de50 in PyErr_Format ()

我相信星号意味着这是结束程序的线程，但我不确定。有谁知道从这里做什么？

Answer 1

这在技术上不是一个答案，而是更多的解决方法。我完全放弃了SimpleCV。我不知道SimpleCV，pygame中是否有错误，或者它是否只是我的头脑。我发现如果我使用pygame来拍照并每分钟重新初始化它，我就不会遇到分段错误。

import cv2
import numpy as np
import pygame
import pygame.camera

import time
import os
import RPi.GPIO as GPIO

T = 1
z = 0
buff = 0
flag = 0


pygame.camera.init()
pygame.camera.list_cameras()
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BOARD)
GPIO.setup(31, GPIO.OUT)
GPIO.setup(32, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

GPIO.output(31,GPIO.HIGH)

while(T):

    w = [0 in range(9)]
    if (flag == 0):
        print("Ready")
        flag = 1


    if (z == 0):
        z+=1
        camera = pygame.camera.Camera("/dev/video0",(320,240))
        camera.start()        

    if(GPIO.input(32) and (z>=1)):

       start = 80
       pixel = 0
       end = 225


       time.sleep(0.32)
       for buff in range(0,5):
           img = camera.get_image()

       pygame.image.save(img, "original.jpg")

       edges = cv2.imread("pic.jpg")

       edges = cv2.Canny(edges,90,210)
       np.edges = edges

       for y in range (100,160):
           i = 0
           first = 0
           temp = 0
           last = 0
           for x in range (start, end):
               pixel = np.edges[y,x]

               if (pixel >=120 and first == 0):
                   first = x


               if (pixel >=120 and first != 0 and last < x):
                   last = x

           if last != 0:
               temp = last - first
               for x in range(start, end):
                   if ((x <= last) and (x >=first)):
                       edges[y,x] = 140;

       z=0;
       camera.stop()

       while(GPIO.input(32)):
           pass

使用此代码，只要您每分钟至少拍摄一张照片，它就不会分段。我曾经一次测试了大约25个小时，另一个测试了12个小时。如果您不需要经常拍照，可以在下次需要时停止相机并重新初始化。我希望这会对某人有所帮助，因为这对我来说是个问题，持续数周。

致命的python错误:( pygame parachute）分段错误

1 个答案: