ue相机与Windows上的python

ueyeueye.pyx: cannot find cimported module 'stdlib'
ueyeueye.pyx: cannot find cimported module 'python_cobject'
Compiling ueyeueye.pyx because it changed.
Compiling ueyeueyeh.pyx because it changed.
[1/2] Cythonizing ueyeueye.pyx

cam = cv2.VideoCapture(0)

width = cam.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)     
height = cam.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT) 
exposure = cam.get(cv2.cv.CV_CAP_PROP_EXPOSURE) 
print width,height,exposure # prints 640 480 -4.0
hr = cam.set(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT,768)
wr = cam.set(cv2.cv.CV_CAP_PROP_FRAME_WIDTH,1024) 
print "Setting resolution ",hr,wr  # prints  True True
cam.set(cv2.cv.CV_CAP_PROP_EXPOSURE,0)  # or any other value,same for gain

width = cam.get(cv2.cv.CV_CAP_PROP_FRAME_WIDTH)    
height = cam.get(cv2.cv.CV_CAP_PROP_FRAME_HEIGHT) 
exposure = cam.get(cv2.cv.CV_CAP_PROP_EXPOSURE) 
print width,exposure # 1024.0 768.0 -4.0

ret,buff = cam.read() 
cam.release()

from SimpleCV import Camera
cam = Camera(0)
img = cam.getImage() # img is a 480 x 640 pixel image

我最近有一个类似的项目,发现了一些对我有用的解决方案.我也使用python 2.7(32位)和Windows 7.我敢肯定还有其他多种方法来控制相机,但我找到的两种方法是(1)使用c API与c API,或(2)使用pythonnet(即clr)和dotNet库.每种方法都需要从单独的dll文件中导入和调用函数.我最终更喜欢ctypes方法,因为它更容易编译成可执行文件,但这两种方法同样适用于控制相机.

1.使用python ctypes的uEye API：

可以使用ctypes在python中调用uEye API dll中的函数.使用ctypes有点麻烦,因为在python和c之间传递变量需要不断地转换数据类型,但它有效.

import ctypes
import numpy as np

uEyeDll = ctypes.cdll.LoadLibrary("ueye_api.dll") #include full path or copy dll into same folder as .py script


#connect camera
cam = ctypes.c_uint32(0)
hWnd = ctypes.c_voidp()
msg=uEyeDll.is_InitCamera(ctypes.byref(cam),hWnd)
ErrChk=uEyeDll.is_EnableAutoExit (cam,ctypes.c_uint(1))
if ~ErrChk:
    print (' Camera Connected')
IS_CM_SENSOR_RAW8  =ctypes.c_int(11)
nRet = uEyeDll.is_SetColorMode(cam,IS_CM_SENSOR_RAW8)
IS_SET_TRIGGER_SOFTWARE = ctypes.c_uint(0x1000)
nRet = uEyeDll.is_SetExternalTrigger(cam,IS_SET_TRIGGER_SOFTWARE)


#allocate memory
width_py = 1600
height_py = 1200
pixels_py =8

width = ctypes.c_int(width_py) #convert python values into c++ integers
height = ctypes.c_int(height_py) 
bitspixel=ctypes.c_int(pixels_py)
pcImgMem = ctypes.c_char_p() #create placeholder for image memory
pid=ctypes.c_int()

ErrChk=uEyeDll.is_AllocImageMem(cam,width,bitspixel,ctypes.byref(pcImgMem),ctypes.byref(pid))
if ~ErrChk:
    print (' Success')
else:
    print (' Memory allocation failed,no camera with value' +str(cam.value))


# Get image data    
uEyeDll.is_SetImageMem(cam,pcImgMem,pid)
ImageData = np.ones((height_py,width_py),dtype=np.uint8)

#put these lines inside a while loop to return continous images to the array "ImageData"  
uEyeDll.is_FreezeVideo (cam,ctypes.c_int(0x0000))  #IS_DONT_WAIT  = 0x0000,or IS_GET_LIVE = 0x8000
uEyeDll.is_CopyImageMem (cam,pid,ImageData.ctypes.data)

2.使用pythonnet& uEye .NET界面

从.NET dll调用函数的语法比使用ctypes更简单,但由于某些原因,安装pythonnet(clr)包对我来说很难.以下是使用.NET函数获取摄像机图像的示例：

import numpy as np
import clr
import sys
import System
from System import Array,Double,IntPtr,Random
print System.Environment.Version
from CLR.System.Reflection import Assembly
from System.Collections.Generic import Dictionary
from System.Runtime.InteropServices import Marshal

true =bool(1)
false=bool(0)

#import .NET dll using clr (pythonnet)
sys.path.append(r"C:Program FilesIDSuEyeDevelopDotNet")  # path of dll
clr.AddReference ('uEyeDotNet') # the dll
import uEye 

# initialize camera 

cam = uEye.Camera()
CAM_ID=1;

msg=cam.Init(CAM_ID)

print 'InitMessage ='+ str(msg)

# Change Camera settings
gain =1  #% gain
exposure = 0.2 #ms
ColorMode=cam.PixelFormat.Set(uEye.Defines.ColorMode.SensorRaw8)
errChk=cam.Trigger.Set(uEye.Defines.TriggerMode.Software)
errChk=cam.Gain.Hardware.GetSupported(1,1,1)
errChk,gainFactor=cam.Gain.Hardware.ConvertScaledToFactor.Master(gain,1)
errChk=cam.Gain.Hardware.Factor.SetMaster(gainFactor)
errChk2,gain=cam.Gain.Hardware.Factor.GetMaster(gain)
errChk2,gainout=cam.Gain.Hardware.Scaled.GetMaster(1)
cam.Timing.Exposure.Set(1)
errChk,exposure_out=cam.Timing.Exposure.Get(exposure)

#allocate image memory
ErrChk,memout=cam.Memory.Allocate(1600,1200,8,true,1)
[ErrChk,Width,Height,Bits,Pitch] = cam.Memory.Inquire(memout,1);

# image aquisition
for n in range(1000):

    ErrChk=cam.Acquisition.Freeze(true)
    outarray = System.Array[System.Byte](())
    [ErrChk,tmp] = cam.Memory.CopyToArray(memout,outarray)

    #'Copy .Net Array using Marshal.Copy
    imageData = np.empty(len(tmp),dtype=np.uint8)
    Marshal.Copy(tmp,IntPtr.__overloads__[int](imageData.__array_interface__['data'][0]),len(tmp))