Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Make faces big by Vision and CoreGraphics
Search
naru-jpn
March 02, 2018
Technology
0
480
Make faces big by Vision and CoreGraphics
“Can you make faces big?”
naru-jpn
March 02, 2018
Tweet
Share
More Decks by naru-jpn
See All by naru-jpn
配信アプリのためのリアルタイムプッシュ通知ぼかしの夢
narujpn
3
900
PiPを応用した配信コメントバー機能の開発秘話と技術の詳解 / pip_streaming_comment_bar
narujpn
3
4.2k
Updating an App to Use Swift Concurrency 解説
narujpn
2
340
PiP で実現するミラティブの配信コメントバー / pip-streaming-comment-bar
narujpn
0
1.2k
App Extension のスタックトレース情報からクラッシュを解析/集計する / Analyzing app extension's stack trace
narujpn
3
1.5k
ミラティブとWebRTC - WebRTC framework の中身を覗いてみよう / WebRTC framework AudioUnit Processing
narujpn
1
2.2k
CoreML3のオンデバイストレーニングでつくる母音推定
narujpn
0
440
AltConfと周辺の歩き方
narujpn
0
2k
エンジニア経験を活かしたスクラムマスターとして 開発チームとプロダクトを成長させる
narujpn
1
410
Other Decks in Technology
See All in Technology
モバイル界のMCPを考える
naoto33
0
370
生まれ変わった AWS Security Hub (Preview) を紹介 #reInforce_osaka / reInforce New Security Hub
masahirokawahara
0
380
ネットワーク保護はどう変わるのか?re:Inforce 2025最新アップデート解説
tokushun
0
150
Delegating the chores of authenticating users to Keycloak
ahus1
0
130
rubygem開発で鍛える設計力
joker1007
3
290
5min GuardDuty Extended Threat Detection EKS
takakuni
0
180
ドメイン特化なCLIPモデルとデータセットの紹介
tattaka
2
530
mrubyと micro-ROSが繋ぐロボットの世界
kishima
3
390
作曲家がボカロを使うようにPdMはAIを使え
itotaxi
0
400
生成AI時代 文字コードを学ぶ意義を見出せるか?
hrsued
1
750
OPENLOGI Company Profile
hr01
0
67k
Node-RED × MCP 勉強会 vol.1
1ftseabass
PRO
0
180
Featured
See All Featured
How To Stay Up To Date on Web Technology
chriscoyier
790
250k
Exploring the Power of Turbo Streams & Action Cable | RailsConf2023
kevinliebholz
34
5.9k
Measuring & Analyzing Core Web Vitals
bluesmoon
7
500
Designing Dashboards & Data Visualisations in Web Apps
destraynor
231
53k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
Fireside Chat
paigeccino
37
3.5k
Music & Morning Musume
bryan
46
6.6k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
The Power of CSS Pseudo Elements
geoffreycrofte
77
5.8k
Testing 201, or: Great Expectations
jmmastey
42
7.6k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
331
22k
Building a Modern Day E-commerce SEO Strategy
aleyda
42
7.4k
Transcript
Make faces big by Vision and CoreGraphics VisionͱCoreGraphicsͰإΛσΧ͘͢Δ Naruki Chigira,
Timers inc. @naruchigi Try! Swift 2018
“Can you make faces big?”
“In about a week.”
None
Core Image want actual
Core ML too much learning cost (also for me) …
Vision
Vision ɾFace Detection and Recognition ɾBarcode Detection ɾText Detection ɾHorizon
Detection ɾObject Detection and Tracking
VNFaceLandmarkRegion2D Class 2D geometry information for a specific facial feature.
VNFaceObservation Class Face or facial-feature information detected by an image analysis request.
Face Couture [CGPoint]
// 1. Create VNDetectFaceLandmarksRequest let request = VNDetectFaceLandmarksRequest() { (request,
error) in guard let results = request.results else { return } let faceObservations = results.flatMap({ $0 as? VNFaceObservation }) // 3. Handle results // … } // 2. Create VNImageRequestHandler and perform let handler = VNImageRequestHandler(cgImage: cgImage, options: [:]) try! handler.perform([request]) How to get VNFaceLandmarkRegion2D
Face Couture
None
None
None
None
None
Core Graphics
CGPoint Structure A structure that contains a point in a
two-dimensional coordinate system.
CGAffineTransform Structure An affine transformation matrix for use in drawing
2D graphics.
CGPoint Structure Instance Method func applying(_ t: CGAffineTransform) -> CGPoint
O
O 1. translate
O 1. translate 2. rotate
O 1. translate 2. rotate 3. reverse + joint
O 1. translate 2. rotate 3. reverse + joint 4.
rotate-1
O 1. translate 2. rotate 3. reverse + joint 4.
rotate-1 5. translate-1
O A A-1 } } 1. translate 2. rotate 3.
reverse + joint 4. rotate-1 5. translate-1
Modify [CGPoint] in Swift // 1. Create CGAffineTransform A let
A = CGAffineTransform(rotationAngle: -theta).translatedBy(x: x, y: y) // 2. Apply A let transformed = points.map { $0.applying(A) } // 3. Reverse & Joint let oval = transformed + transformed.map { CGPoint(x: -$0.x, y: -$0.y) } // 4. Apply A-1 let result = oval.map { $0.applying(A.inverted()) }
Result
None
None
Summary Get facial features from Vision (iOS 11.0~) Process data
using CoreGraphics (iOS 2.0~) +
Thank you!