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[英]How do I wrap a C-library including its header into a python program using CFFI?
[英]How do i flush memory in a Python program with C-library?
Python程序功能是使用网络摄像头查找最亮的光线,并将X,Y坐标发送到arduino程序。 这是用相机跟随太阳。
问题是内存增加,直到程序冻结。 我试过使用后去掉所有变量。 但是它仍然使用过多的内存。
操作系统:Windows 7
我如何找到并阻止泄漏?
这是python代码:
import cv
import traceback
import serial
try:
cv.NamedWindow("CameraFeed", 1)
capture = cv.CaptureFromCAM(0)
cv.NamedWindow("Altered", 1)
except:
cv.DestroyWindow("CameraFeed")
cv.DestroyWindow("Altered")
traceback.print_exc()
ser = serial.Serial("COM15",9600)
def repeat():
imga = cv.QueryFrame(capture)
img = cv.CreateImage(cv.GetSize(imga),8,3)
cv.Smooth(imga, img, cv.CV_BLUR, 3)
thresholded_img = cv.CreateImage(cv.GetSize(img), 8, 1)
del(img)
minv = cv.Scalar(250,250,250, 0)
maxv = cv.Scalar(255,255,255, 0)
cv.InRangeS(imga, minv, maxv, thresholded_img)
del(minv)
del(maxv)
#determine the objects moments and check that the area is large
#enough to be our object
moments = cv.Moments(cv.GetMat(thresholded_img,1), 0)
area = cv.GetCentralMoment(moments, 0, 0)
#there can be noise in the video so ignore objects with small areas
if(area > 10000):
#determine the x and y coordinates of the center of the object
#we are tracking by dividing the 1, 0 and 0, 1 moments by the area
x = cv.GetSpatialMoment(moments, 1, 0)/area
y = cv.GetSpatialMoment(moments, 0, 1)/area
del(moments)
del(area)
#print 'x: ' + str(x) + ' y: ' + str(y) + ' area: ' + str(area)
#create an overlay to mark the center of the tracked object
overlay = cv.CreateImage(cv.GetSize(imga), 8, 3)
cv.Circle(imga, (int(x), int(y)), 5, (255, 0, 0), 20)
cv.Add(imga, overlay, imga)
del(overlay)
#add the thresholded image back to the img so we can see what was
#left after it was applied
cv.Merge(thresholded_img, None, None, None, imga)
print 'X: ',x
print 'Y: ',y
print ' '
if x < 300:
print "left"
if x > 340:
print "Right"
if y < 210:
print "Up"
if y > 250:
print "Down"
ser.write('%03i%03i\r\n'% (int(x),int(y)))
else:
ser.write('%03i%03i\r\n'% (320,240))
cv.ShowImage("CameraFeed", thresholded_img)
cv.ShowImage("Altered", imga)
del(imga)
del(thresholded_img)
try:
while True:
repeat()
if cv.WaitKey(10) == 13:
break
except:
cv.DestroyWindow("CameraFeed")
cv.DestroyWindow("Altered")
ser.close()
traceback.print_exc()
cv.DestroyWindow("CameraFeed")
cv.DestroyWindow("Altered")
ser.close()
del(serial)
exit()
这是GetMat的已知错误-> http://code.opencv.org/issues/1579
该代码看起来正确( 示例如何执行 )。 不必删除变量; 当repeat()
返回时,它们都将被删除。
我的猜测是您使用的OpenCV版本中存在一个错误。 尝试其他版本。 如果该行为发生在最新版本中而不是较旧版本中,请考虑报告该错误。
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