October 2024
Intermediate
240 pages
6h 57m
Japanese
Content preview from 図解まるわかり VR・AR・MRのしくみ
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.
44
マーカー方式、Depthセンサー方式、2D カメラ
手の動きを取り込む
ハ ンドトラッキ ング
2-8
手の動作を正確に把握するマーカー方式
没入感の高いVR体験を実現するために、リアルタイムで人の手の位置、
動き、ジェスチャーを検知し、追跡する技術をハンドトラッキングといい
ます。この技術によって、仮想空間内に自然な手の動きを取り込めます。
ハンドトラッキングには、主に3 つの方式があります（図 2-15）。1 つ
目はマーカー方式です。手や手の各部位を追跡するための印（マーカー）
をつけた専用の手袋と、動きをキャプチャする複数台のカメラを用いま
す。カメラはマーカーの動きを捉えて、コンピュータでこれらの動きから
実際の動作を正確に把握し、データとして抽出します。
立体形状を認識するDepth（深度）センサー方式
2 つ目はDepth（深度）センサー方式です。赤外線を使い手の立体形
状を認識します。赤外線が手にあたり反射した光の時間差から手の形状を
立体的に特定します。主に3 つの手法があり、赤外線パターンを投影し、
ひずみから3D形状を再構成する構造化光方式、光パルスの反射時間から
距離を計算する飛行時間方式（ToF）、2 つのカメラで撮影した画像から視
差を利用して計算するステレオビジョン方式があります。
いずれも、図2-16 にある Microsoft 社が提供している AzureKinectDK
深度カメラなどの専用のDepth センサーが用いられます。
2Dカメラからの推定
3つ目は2D
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.