pymba_frame_callback.py

import time
import matplotlib.pyplot as plt
import numpy as np

from pymba import Vimba


print("Starting Vimba")
vimba = Vimba()
vimba.startup()

print("Vimba Version: %s" % vimba.getVersion())

print("GigE Camera Discovery")
system = vimba.getSystem()
system.runFeatureCommand('GeVDiscoveryAllOnce')

ids = vimba.getCameraIds()
print("Available Cameras: %s" % ', '.join(ids))


cam = vimba.getCamera(ids[0])
cam.openCamera()

cam.AcquisitionMode = 'Continuous'


frames = [cam.getFrame() for _ in range(2)]
map(lambda f: f.announceFrame(), frames)

images = []

start = time.clock()


def cb(frame):
    print("Entering Frame Callback. Time: %.2f" % (time.clock() - start))
    print("Frame Information:")
    print("  pymba Frame: %s" % str(frame))
    print("  vimba Frame: %s" % str(frame._frame))
    print("  pymba Frame properties:")
    for p in ['width', 'height', 'payloadSize', 'pixel_bytes']:
        print("    frame.%s = %s" % (p, str(getattr(frame, p))))
    print("  vimba Frame properties:")
    for p in ['ancillarySize', 'buffer', 'bufferSize', 'context', 'frameID', 'height', 'width',
              'imageSize', 'offsetX', 'offsetY', 'pixelFormat', 'receiveFlags', 'receiveStatus',
              'timestamp']:
        print("    frame._frame.%s = %s" % (p, str(getattr(frame._frame, p))))

    images.append(frame.getImage().copy())
    frame.queueFrameCapture(cb)


cam.startCapture()
map(lambda f: f.queueFrameCapture(cb), frames)

print("Starting First Acquisition. Time: %.2f" % (time.clock() - start))
cam.runFeatureCommand('AcquisitionStart')

print("Waiting 1 Seconds. Time: %.2f" % (time.clock() - start))
time.sleep(1)


cam.runFeatureCommand('AcquisitionStop')
print("Stopping Second Acquisition. Time: %.2f" % (time.clock() - start))


print("End Capture and Revoke all Frames")
cam.endCapture()
cam.flushCaptureQueue()
cam.revokeAllFrames()
cam.closeCamera()

plt.show()

print("Vimba Shutdown")
vimba.shutdown()

print("Captured %d Images" % len(images))

plt.figure("Caputred Images")
plt.clf()
plt.subplot(221)
plt.imshow(images[0], cmap='gray')
plt.title("Image Frame 1")
plt.subplot(222)
plt.imshow(images[1], cmap='gray')
plt.title("Image Frame 2")
plt.subplot(223)
plt.imshow(images[0].astype(float) - images[1].astype(float))
plt.title("Difference Frame 1 - Frame 2")
plt.colorbar()
plt.subplot(224)
plt.imshow(images[0].astype(float) - images[2].astype(float))
plt.title("Difference Frame 1 - Frame 3")
plt.colorbar()
plt.show()