CVBpy 14.0
cvb/StreamingParallel
1# CVBpy Example Script
2#
3# 1. Open the GenICam.vin driver.
4# 2. Acquire images in a dedicated native thread through a stream handler.
5# 3. Measure the frame rate and print results.
6#
7# Requires: A connected and configured GenICam device
8
9import time
10import os
11import cvb
12
13
14class MyStreamHandler(cvb.SingleStreamHandler):
15
16 def __init__(self, stream):
17 super().__init__(stream)
18 self.rate_counter = cvb.RateCounter()
19
20 # called in the interpreter thread to setup additionla stuff.
21 def setup(self, stream):
22 super().setup(stream)
23 print("setup")
24
25 # called in the interpreter thread to tear down stuff from setup.
26 def tear_down(self, stream):
27 super().tear_down(stream)
28 print("tear_down")
29
30 # called from the aqusition thread
31 def handle_async_stream(self, stream):
32 super().handle_async_stream(stream)
33 print("handle_async_stream")
34
35 # called from the aqusition thread
36 def handle_async_wait_result(self, image, status):
37 super().handle_async_wait_result(image, status)
38 self.rate_counter.step()
39 print("New image: " + image.__class__.__name__ + " " + str(image) + " | Status: " + str(status) + " | Buffer Index: " + str(image.buffer_index))
40
41 # print messurement results
42 def eval(self):
43 print("Acquired with: " + str(self.rate_counter.rate) + " fps")
44
45
47 os.path.join(cvb.install_path(), "drivers", "CVMock.vin"),
48 cvb.AcquisitionStack.Vin) as device:
49 with MyStreamHandler(device.stream()) as handler:
50 handler.run()
51 time.sleep(10)
52 handler.finish()
53
54
Union[cvb.GenICamDevice, cvb.VinDevice, cvb.EmuDevice, cvb.VideoDevice, cvb.NonStreamingDevice] open(str provider, int acquisition_stack=cvb.AcquisitionStack.PreferVin)
Opens a device with the given provider and acquisition stack.
Definition: __init__.py:1327
Frame rate measurement counter with selectable averaging window.
Definition: __init__.py:4026
Handler object for a single stream.
Definition: __init__.py:4380
str install_path()
Directory Common Vision Blox has been installed to.
Definition: __init__.py:7146