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CVB PYTHON PROTOTYPING

SCRIPTING VISION APPLICATIONS

ANDREAS RITTINGER, IMAGE ACQUISITION

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Why prototyping is important?

CONTENT

How can Python help you?

What is special about CVB Python bindings?

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PROTOTYPES

Get in the right direction

Learn

Time and cost estimate

Present e.g. customer

Answers

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WHY PYTHON?

What about the GIL?

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PYTHON STATS

Source: Stack Overflow 2019

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Python is the second best

language

for anything

just import antigravity

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CVB PYTHON PHILOSOPHY

When we started…

Generate Python from C

Generate Python from C++

Do it manually?

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CVB PYTHON

Source: https://en.wikipedia.org/wiki/NumPy#/media/File:NumPy_logo.svg

Source: https://qt-wiki-uploads.s3.amazonaws.com/images/3/33/Py-128.png

Explicit resource management

Build-in documentation

Multithreading and async support

Stable API (PEP 384)

Interface to NumPy

UI using PySide2

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OBJECT ORIENTATION

The basic classes the wrappers provide

Device Factory

Device(vin)

Device(video)

Device(emu)

Stream Node

Map

Device(non

streaming)

Stream

Node

Ring

BufferImage

Plane Plane

Node

Map

Node

Interfaces

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Hello World:

CVB PYTHON

import osimport cvb

with cvb.DeviceFactory.open(os.path.join(cvb.install_path(), "drivers", "CVMock.vin") as device:stream = device.streamstream.start()

for i in range(10):image, status = stream.wait()if status == cvb.WaitStatus.Ok:

print("Acquired image: " + str(i))

stream.abort()

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EXAMPLE TASK

Live display

Works with any GenICam device

Responsive / designable UI

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CVB DISPLAY

How To?

Multithreaded

Generic HW handling

Separate UI from Logic (MV… whatever)

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DEMO

CVB Display Prototype

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THANK YOU VERY MUCH FOR YOUR ATTENTION

Your contact:

Andreas Rittinger

STEMMER IMAGING AG

a.rittinger@stemmer-imaging.de

https://www.stemmer-imaging.dehttps://forum.commonvisionblox.com

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