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System Requirements

下記環境で動作確認をしました。

$ python -V
Python 3.6.5

$ pip freeze
...
numpy==1.14.4
opencv-python==3.4.1.15

$ brew config
HOMEBREW_VERSION: 1.6.8
ORIGIN: https://github.com/Homebrew/brew
HEAD: 3081390ff845a6172b9004cf404c3e028e3be745
Last commit: 24 hours ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 8fdf00c3de11f397ac5d109b7f5667c2334385e9
Core tap last commit: 59 minutes ago
HOMEBREW_PREFIX: /usr/local
CPU: quad-core 64-bit broadwell
Homebrew Ruby: 2.3.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby
Clang: 9.1 build 902
Git: 2.17.0 => /usr/local/bin/git
Curl: 7.54.0 => /usr/bin/curl
Java: 10.0.1
macOS: 10.13.4-x86_64
CLT: 9.4.0.0.1.1526532315
Xcode: 9.4
XQuartz: 2.7.11 => /opt/X11

Usage

$ python capture.py

上記コマンドにより起動します。Macの場合、内蔵カメラが捉えた画像を表示します。

Source

import cv2

cap = cv2.VideoCapture(0)

while True:
    # Capture frame-by-frame
    ret, frame = cap.read()

    # Display the resulting frame
    cv2.imshow('frame', frame)
    if cv2.waitKey(1) == 27:    # exit push escape key(27)
        break

# When everything done, release the capture
cap.release()
cv2.destroyAllWindows()