海康工业相机Python调用实现拍照

条件：Python+海康官方的mvs文件下的development/samples下的python文件夹

注意：相机连接后不要用官方app打开相机，不然python代码检测不到设备，代码在pycharm会提示报错，亲测能跑并能截取到图片

# -- coding: utf-8 --import sys
import copy
import msvcrtfrom ctypes import *
import timesys.path.append("../MvImport")
from MvCameraControl_class import *if __name__ == "__main__":deviceList = MV_CC_DEVICE_INFO_LIST()tlayerType = MV_GIGE_DEVICE | MV_USB_DEVICE# ch:枚举设备 | en:Enum deviceret = MvCamera.MV_CC_EnumDevices(tlayerType, deviceList)if ret != 0:print ("enum devices fail! ret[0x%x]" % ret)sys.exit()if deviceList.nDeviceNum == 0:print ("find no device!")sys.exit()print ("find %d devices!" % deviceList.nDeviceNum)for i in range(0, deviceList.nDeviceNum):mvcc_dev_info = cast(deviceList.pDeviceInfo[i], POINTER(MV_CC_DEVICE_INFO)).contentsif mvcc_dev_info.nTLayerType == MV_GIGE_DEVICE:print ("\ngige device: [%d]" % i)strModeName = ""for per in mvcc_dev_info.SpecialInfo.stGigEInfo.chModelName:strModeName = strModeName + chr(per)print ("device model name: %s" % strModeName)nip1 = ((mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0xff000000) >> 24)nip2 = ((mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0x00ff0000) >> 16)nip3 = ((mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0x0000ff00) >> 8)nip4 = (mvcc_dev_info.SpecialInfo.stGigEInfo.nCurrentIp & 0x000000ff)print ("current ip: %d.%d.%d.%d\n" % (nip1, nip2, nip3, nip4))elif mvcc_dev_info.nTLayerType == MV_USB_DEVICE:print ("\nu3v device: [%d]" % i)strModeName = ""for per in mvcc_dev_info.SpecialInfo.stUsb3VInfo.chModelName:if per == 0:breakstrModeName = strModeName + chr(per)print ("device model name: %s" % strModeName)strSerialNumber = ""for per in mvcc_dev_info.SpecialInfo.stUsb3VInfo.chSerialNumber:if per == 0:breakstrSerialNumber = strSerialNumber + chr(per)print ("user serial number: %s" % strSerialNumber)nConnectionNum = input("please input the number of the device to connect:")if int(nConnectionNum) >= deviceList.nDeviceNum:print ("intput error!")sys.exit()# ch:创建相机实例 | en:Creat Camera Objectcam = MvCamera()# ch:选择设备并创建句柄 | en:Select device and create handlestDeviceList = cast(deviceList.pDeviceInfo[int(nConnectionNum)], POINTER(MV_CC_DEVICE_INFO)).contentsret = cam.MV_CC_CreateHandle(stDeviceList)if ret != 0:print ("create handle fail! ret[0x%x]" % ret)sys.exit()# ch:打开设备 | en:Open deviceret = cam.MV_CC_OpenDevice(MV_ACCESS_Exclusive, 0)if ret != 0:print ("open device fail! ret[0x%x]" % ret)sys.exit()# ch:探测网络最f佳包大小(只对GigE相机有效) | en:Detection network optimal package size(It only works for the GigE camera)if stDeviceList.nTLayerType == MV_GIGE_DEVICE:nPacketSize = cam.MV_CC_GetOptimalPacketSize()if int(nPacketSize) > 0:ret = cam.MV_CC_SetIntValue("GevSCPSPacketSize",nPacketSize)if ret != 0:print ("Warning: Set Packet Size fail! ret[0x%x]" % ret)else:print ("Warning: Get Packet Size fail! ret[0x%x]" % nPacketSize)# ch:设置触发模式为off | en:Set trigger mode as offret = cam.MV_CC_SetEnumValue("TriggerMode", MV_TRIGGER_MODE_OFF)if ret != 0:print ("set trigger mode fail! ret[0x%x]" % ret)sys.exit()# ch:获取数据包大小 | en:Get payload sizestParam =  MVCC_INTVALUE()memset(byref(stParam), 0, sizeof(MVCC_INTVALUE))ret = cam.MV_CC_GetIntValue("PayloadSize", stParam)if ret != 0:print ("get payload size fail! ret[0x%x]" % ret)sys.exit()nPayloadSize = stParam.nCurValue# ch:开始取流 | en:Start grab imagestart_time = time.time()ret = cam.MV_CC_StartGrabbing()if ret != 0:print ("start grabbing fail! ret[0x%x]" % ret)sys.exit()stDeviceList = MV_FRAME_OUT_INFO_EX()memset(byref(stDeviceList), 0, sizeof(stDeviceList))data_buf = (c_ubyte * nPayloadSize)()ret = cam.MV_CC_GetOneFrameTimeout(byref(data_buf), nPayloadSize, stDeviceList, 1000)if ret == 0:# Stop = time()# print(Stop - start)print ("get one frame: Width[%d], Height[%d], nFrameNum[%d]"  % (stDeviceList.nWidth, stDeviceList.nHeight, stDeviceList.nFrameNum))stConvertParam = MV_SAVE_IMAGE_PARAM_EX()stConvertParam.nWidth = stDeviceList.nWidthstConvertParam.nHeight = stDeviceList.nHeightstConvertParam.pData = data_bufstConvertParam.nDataLen = stDeviceList.nFrameLenstConvertParam.enPixelType = stDeviceList.enPixelType# MV_Image_Undefined  = 0, //未定义#   MV_Image_Bmp        = 1, //BMP图片#   MV_Image_Jpeg       = 2, //JPEG图片#   MV_Image_Png        = 3, //PNG图片，暂不支持#   MV_Image_Tif        = 4, //TIF图片，暂不支持# jpg参数# stConvertParam.nJpgQuality   = 99  # 压缩质量选择范围[50-99]# file_path = "save.jpg"# stConvertParam.enImageType = MV_Image_Jpeg# bmpsize = nPayloadSizefile_path = "save.bmp"stConvertParam.enImageType = MV_Image_Bmpbmpsize = stDeviceList.nWidth * stDeviceList.nHeight * 3 + 54stConvertParam.nBufferSize = bmpsizebmp_buf = (c_ubyte * bmpsize)()stConvertParam.pImageBuffer = bmp_bufret = cam.MV_CC_SaveImageEx2(stConvertParam)if ret != 0:print ("save file executed failed0:! ret[0x%x]" % ret)del data_bufsys.exit()end_time = time.time()print (start_time - end_time)# print(stop - start)file_open = open(file_path.encode('ascii'), 'wb+')try:img_buff = (c_ubyte * stConvertParam.nImageLen)()cdll.msvcrt.memcpy(byref(img_buff), stConvertParam.pImageBuffer, stConvertParam.nImageLen)file_open.write(img_buff, )print (img_buff)except:raise Exception("save file executed failed1::%s" % e.message)finally:file_open.close()else:print ("get one frame fail, ret[0x%x]" % ret)# ch:停止取流 | en:Stop grab imageret = cam.MV_CC_StopGrabbing()if ret != 0:print ("stop grabbing fail! ret[0x%x]" % ret)del data_bufsys.exit()# ch:关闭设备 | Close deviceret = cam.MV_CC_CloseDevice()if ret != 0:print ("close deivce fail! ret[0x%x]" % ret)del data_bufsys.exit()# ch:销毁句柄 | Destroy handleret = cam.MV_CC_DestroyHandle()if ret != 0:print ("destroy handle fail! ret[0x%x]" % ret)del data_bufsys.exit()del data_buf

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海康工业相机Python调用实现拍照

条件：Python+海康官方的mvs文件下的development/samples下的python文件夹

注意：相机连接后不要用官方app打开相机，不然python代码检测不到设备，代码在pycharm会提示报错，亲测能跑并能截取到图片

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