def startup(self):
"""Handle the startup of the camera.
Raises
------
CameraNotFound
Raises this exception if there is an issue with the camera.
"""
self.goodFrames = 0
self.badFrames = 0
self.totalFrames = 0
self.vimba = pv.Vimba()
self.vimba.startup()
time.sleep(0.2)
cameraIds = self.vimba.camera_ids()
try:
self.cameraPtr = self.vimba.camera(cameraIds[self.cameraIndex])
except IndexError:
raise CameraNotFound('Camera not found ... check power or connection!')
self.cameraPtr.open()
#self.cameraPtr.GevSCPSPacketSize = 1500
try:
currentSbps = self.cameraPtr.StreamBytesPerSecond
self.cameraPtr.StreamBytesPerSecond = self.STREAM_BYTES_PER_SECOND
except pv.VimbaException:
message = f'Issue with ethernet cable ... StreamBytesPerSecond: {currentSbps}'
message += f' instead of {self.STREAM_BYTES_PER_SECOND}'
raise CameraNotFound(message)
self.height = self.cameraPtr.HeightMax
self.width = self.cameraPtr.WidthMax
self.frameShape = (self.height, self.width)
self.cameraPtr.Height = self.height
self.cameraPtr.Width = self.width
self.cameraPtr.OffsetX = 0
self.cameraPtr.OffsetY = 0
self.cameraPtr.GainAuto = 'Off'
self.cameraPtr.GainRaw = 0
self.cameraPtr.ExposureAuto = 'Off'
self.cameraPtr.TriggerSource = 'Freerun'
self.cameraPtr.PixelFormat = 'Mono12'
self.cameraPtr.ExposureTimeAbs = self.roiExposureTime
self.cameraPtr.arm('Continuous', self.convertFrame)
This demonstration assumes you have already installed Pymba and followed the installation instructions there:
https://github.com/morefigs/pymba
MoviePy is used to save the frames to a video file for later viewing, while the frame's mean intensity is
printed in real time. MoviePy can be installed from pip nicely.
"""
import pymba
from moviepy.video.io.ffmpeg_writer import FFMPEG_VideoWriter as VidWriter
from skimage.color import gray2rgb
import time
# Start by getting the Vimba API set up
# Using the context (i.e. 'with' syntax) is a good idea
# If something crashes, vimba.shutdown() will get called automatically
# and your camera will not get left in an unusable state!
with pymba.Vimba() as vimba:
print vimba.getVersion()
# Find any cameras that are attached
system = pymba.getSystem()
system.runFeatureCommand("GeVDiscoveryAllOnce")
time.sleep(
0.2
) # feature commands run in another thread, but need a moment to execute
camera_ids = vimba.getCameraIds()
# Just use the first camera we found
vmb_cam = vimba.getCamera(camera_ids[0])
vmb_cam.openCamera()
# Set up the camera with the right parameters