March 2019
Intermediate to advanced
424 pages
5h 18m
Japanese
Content preview from PythonによるAIプログラミング入門 ―ディープラーニングを始める前に身につけておくべき15の基礎技術
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
13章物体検出と追跡
本章では画像認識のうちの一分野である、物体検出と追跡について説明します。OpenCVという有名なコンピュータビジョンのライブラリを用います。
本章を通じて、以下の項目を学びます。
- OpenCVのインストール
- フレーム差分
- 色空間を使った物体検出
- 背景差分を使った物体検出
- CAMShift法を用いたインタラクティブな物体追跡
- オプティカルフローを用いた物体追跡
- 顔検出
- Haarカスケードによる物体検出
- 積分画像を用いた特徴抽出
- 目の検出
13.1 OpenCVのインストール
本章では、OpenCVという有名な画像認識ライブラリを使います。OpenCVの詳細はhttp://opencv.orgを参照してください。この先に進む前にOpenCVをインストールしてあることを確認してください。
OpenCVは、次のようにインストールできます。
pipの場合：
$ pip3 install opencv-python
Anacondaの場合：
$ conda install opencv
インストールできたら次の節に進みましょう。
13.2 Jupyter Notebookでの画像表示
OpenCVで画像を表示するのに、通常はcv2.imshow()関数を用いますが、Jupyter Notebookではうまく動作しないので、ブラウザ上に画像を表示する方法を説明します。
新たにPython 3のタブを開き、次のコードを入力してください。cv2はOpenCVのパッケージで、IPython.displayはブラウザ上の表示領域を操作するためのパッケージです。
import cv2 import IPython.display
画像を表示する関数
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.