Junho Cho

Junho Cho

AI/ML Research Engineer

๐Ÿ“ Seoul
http://github.com/junhocho
kinect

KinectProjectorToolKit ์œผ๋กœ ๋ฐ๋ชจ ์‹คํ–‰ํ•˜๊ธฐ.

. ์—ฌํƒœ๊นŒ์ง€๋Š” ๊ทธ๋ƒฅ ๋ชจ๋‹ˆํ„ฐ๋กœ ํ‚ค๋„ฅํŠธ์˜ ์ธ์‹๊ฒฐ๊ณผ๋ฅผ ์ถœ๋ ฅํ•˜์˜€๋‹ค. ์ด์ œ๋Š” ํ‚ค๋„ฅํŠธ๋กœ ์‚ฌ๋žŒ๊ณผ ๋ฐฐ๊ฒฝ์„ ์ธ์‹ํ•œ ๊ฒƒ์„ ํ”„๋กœ์ ํ„ฐ๋กœ ํ”ผ์‚ฌ์ฒด์— ์˜์•„ mappingํ•˜๋Š” ๊ณผ์ •์„ ํ•œ๋‹ค. ์ด๋•Œ ์“ฐ๋Š” ์ฝ”๋“œ๋Š” https://github.com/genekogan/KinectProjectorToolkit ์„ ์‚ฌ์šฉํ•œ๋‹ค. ์—ฌํƒœ๊นŒ์ง€ ํ–ˆ๋˜ kinect flow, physics ๋“ฑ์€ ์‚ฌ์‹ค ํ”ผ์‚ฌ์ฒด์— ํ”„๋กœ์ ํ„ฐ๋กœ mapping์„ ํ•˜๋Š” ๋ชฉ์ ์ด ์•„๋‹ˆ๊ณ  ๊ทธ๋ƒฅ ๋Œ€ํ˜•ํ™”๋ฉด์— ๋„์šฐ๋Š” ๋“ฏํ•œ ๋ชฉ์ ์ด๋‹ค. ํ•˜์ง€๋งŒ ์œ„ ์ฝ”๋“œ๋Š” ํ‚ค๋„ฅํŠธ๋กœ์—์„œ

์–ด๋–ค Deep Learning Library๋ฅผ ์„ ํƒํ•ด์•ผํ•˜๋‚˜์š”?
Deep Learning

์–ด๋–ค Deep Learning Library๋ฅผ ์„ ํƒํ•ด์•ผํ•˜๋‚˜์š”?

**Deep Learning(๋”ฅ๋Ÿฌ๋‹)**์ด๋ผ๋Š” ๊ธฐ์ˆ ์ด ์ตœ๊ทผ ๊ฑฐ์˜ ๋ชจ๋“  ๊ธฐ๊ณ„ํ•™์Šต๋ฅ˜ ๋ฌธ์ œ์˜ ํ•ด๊ฒฐ์ฑ…์œผ๋กœ ๋– ์˜ค๋ฅด๊ณ ์žˆ๋‹ค. "์ด ๊ธฐ์ˆ ์„ ๋ฌด์—‡์œผ๋กœ ๊ตฌํ˜„ํ•ด์„œ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ์ด ๊ฐ€์žฅ ํšจ์œจ์ ์ธ๊ฐ€" ๋ผ๋Š” ์งˆ๋ฌธ์ด ์•„์ฃผ ํ”ํ•˜๋‹ค. ๋Œ€๋ถ€๋ถ„์€ ๋”ฅ๋Ÿฌ๋‹์„ ์‹œ์ž‘ํ•˜๋Š” ๊น€์— ๋” ๋น ๋ฅด๊ณ , ๋” ๋ฉ”๋ชจ๋ฆฌ๊ฐ€ ํšจ์œจ์ ์ธ ๊ฒƒ์ด๊ณ , ๋” ์‰ฌ์šด ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์‚ฌ์šฉํ•˜๊ณ  ์‹ถ์€ ์š•์‹ฌ์ผ ๊ฒƒ์ด๋‹ค.(๋‚˜๋„ ๊ทธ๋žฌ์œผ๋‹ˆ๊นŒ) ๋งŒ์•ฝ ๋ˆ„๊ตฐ๊ฐ€ Convlutional Neural Network(

Kinect์˜ SimpleOpenNI API ์‚ฌ์šฉํ•˜๊ธฐ
kinect

Kinect์˜ SimpleOpenNI API ์‚ฌ์šฉํ•˜๊ธฐ

๊ธฐ๋ณธ์ ์ธ ํŠœํ† ๋ฆฌ์–ผ๋กœ ์ด๊ฒƒ์œผ๋กœ ์‹œ์ž‘ํ•˜์˜€์œผ๋ ค๋‚˜, ์‚ฌ์šฉํ•˜๋ ค๋Š” ๋ฐ๋ชจ ํŠœํ† ๋ฆฌ์–ผ์€ ์ด๊ฒŒ ๋” ๋ฉ‹์žˆ์–ด์„œ ๋ฐ”๊ฟ” ์ง„ํ–‰ํ–ˆ๋‹ค. ํ—ˆ๋‚˜ ๋ฌธ์ œ๋Š” ์ด ํŠœํ† ๋ฆฌ์–ผ์€ Kinect v1๋งŒ ์ง€์›ํ•œ๋‹ค๋Š” ๊ฒƒ์ธ๋ฐ, Kinect v2๋ฅผ ์ง€์›ํ•˜๋Š” ์ง€๋Š” ๋” ์•Œ์•„๋ด์•ผํ•  ๋ฌธ์ œ์ด๋‹ค. ์ด ํŠœํ† ๋ฆฌ์–ผ์€ SimpleOpenNI๋ฅผ ์ ๊ทน์ ์œผ๋กœ ํ™œ์šฉํ•˜๋Š”๋ฐ, Processing์„ ์ด์šฉํ•ด์„œ ์ด ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์–ด๋–ป๊ฒŒ ์‚ฌ์šฉํ•˜๋Š”์ง€๋ฅผ ์งง๊ฒŒ ์˜ฎ๊ฒจ๋ณธ๋‹ค. ๊ฐ€์žฅ ๊ธฐ๋ณธ์ ์ธ ์ฝ”๋“œ๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค. // Kinect Basic Example by Amnon

๋„๋ฉ”์ธ ๊ตฌ์ž…, ๊ฐœ์ธ ์›น์„œ๋ฒ„ Ghost์— ์—ฐ๊ฒฐํ•˜๊ธฐ
ghost

๋„๋ฉ”์ธ ๊ตฌ์ž…, ๊ฐœ์ธ ์›น์„œ๋ฒ„ Ghost์— ์—ฐ๊ฒฐํ•˜๊ธฐ

๊ฐœ์ธ ์›น์„œ๋ฒ„์— Ghost๊ฐ€ ์„ค์น˜๋˜์–ด ์žˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•˜๊ณ  ์‹œ์ž‘ํ•œ๋‹ค.[1] ์ผ๋‹จ ๊ฐœ์ธ ์›น์„œ๋ฒ„์˜ ip์ฃผ์†Œ๊ฐ€ 123.123.123.123 ๋ญ ์ด๋ ‡๊ฒŒ ๋˜์–ด์žˆ๋‹ค๊ณ ์น˜๋ฉด 80ํฌํŠธ๊ฐ€ ์—ด๋ ค์žˆ์–ด์•ผํ•œ๋‹ค. ์›น์—์„œ http://123.123.123.123 ๋กœ ์ ‘์†ํ•˜๋ฉด ์‚ฌ์‹ค์€ http://123.123.123.123:80 ์œผ๋กœ ์ ‘์†ํ•œ๋‹ค. ๊ทผ๋ฐ ๋งŒ์•ฝ์— ๋‚ด ๊ฐœ์ธ ์›น์„œ๋ฒ„์— ์—ฌ๋Ÿฌ ๋ธ”๋กœ๊ทธ๋‚˜ ๋‹ค๋ฅธ ์›น์„œ๋ฒ„๋ฅผ ์šด์˜ํ•˜๊ณ  ์‹ถ๋‹ค๋ฉด? 80ํฌํŠธ๊ฐ€

Kinect Tutorial ํ•ด๋ณด๊ธฐ
kinect

Kinect Tutorial ํ•ด๋ณด๊ธฐ

Kinect Physcis Tutorial ์„ ํ•ด๋ณด์•˜๋‹ค. ์•„๊นŒ์˜ ๋งํฌ๋ฅผ ๋”ฐ๋ผํ–ˆ๋Š”๋ฐ ์ง€๊ธˆ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ๋Š” ์ฝ”๋“œ ๋ฒ„์ ผ์ด๋ž‘ ๋‹ค๋ฅธ ๊ฒƒ ๊ฐ™๋‹ค. ์˜ˆ๋ฅผ ๋“ค์–ด, // declare SimpleOpenNI object SimpleOpenNI context; ๋กœ context๋ฅผ ์ •์˜ํ•˜๊ณ , context.enableScene() ๊ฐ™์€ ํ•จ์ˆ˜๋Š” ํ˜„์žฌ ์“ฐ๊ณ ์žˆ๋Š” Processing 2.2.1 ๋ฒ„์ „์—์„œ๋Š” ๋‹ค๋ฅธ API๋กœ ์ œ๊ณต๋˜๋Š” ๋“ฏํ•˜๋‹ค. if (!context.enableScene()) { println("Kinect not connected!"

Kinect v1์™€ v2. ๊ทธ๋ฆฌ๊ณ  OSX, ๋งฅ์— ์—ฐ๊ฒฐ์‹œํ‚ค๊ธฐ
kinect

Kinect v1์™€ v2. ๊ทธ๋ฆฌ๊ณ  OSX, ๋งฅ์— ์—ฐ๊ฒฐ์‹œํ‚ค๊ธฐ

Kinect v1 Kinect v2 ๋‘˜์˜ ์ž์„ธํ•œ ๋น„๊ต๋Š” ์ด๊ณณ ๋ธ”๋กœ๊ทธ์— ์ž˜ ์†Œ๊ฐœ๋˜์–ด์žˆ๋‹ค. ๋‘๊ฐœ ๋‹ค ์„ฑ๊ณต์ ์œผ๋กœ ์—ฐ๊ฒฐ์‹œํ‚ฌ ์ˆ˜ ์žˆ์—ˆ๋Š”๋ฐ, ํ™•์‹คํžˆ v2๊ฐ€ ๋” ์„ฑ๋Šฅ์ด ์ข‹์•˜๋‹ค. ๋ณดํ†ต ์œˆ๋„์šฐ์— ์—ฐ๊ฒฐ์‹œํ‚ค๋Š” ํ›„๊ธฐ๋“ค์€ ๋งŽ์•„์„œ ์œˆ๋„์šฐ, ํ‚ค๋„ฅํŠธ ๋‘˜๋‹ค MS๊บผ๋‹ˆ๊นŒ ๋‚˜๋Š” ๋งฅ๋ถํ”„๋กœ๋ฅผ ์“ฐ๊ธฐ ๋•Œ๋ฌธ์— ์ด๊ฑธ ์‹œ๋„ํ•ด๋ดค๋‹ค. ๋‚ด๊ฐ€ ์“ฐ๋Š” ๋งฅ๋ถํ”„๋กœ๋Š” OSX Elcapitan v10.11.3์—์„œ ํ…Œ์ŠคํŠธํ–ˆ๋‹ค. TEDxSNU์˜ Interactive Session๊ฐ™์€ ๊ฑฐ๋กœ

Detection

Deep Learning based Detection

Computer Vision์—์„œ Detection ์ด๋ž€ image์—์„œ ๋ฌผ์ฒด๋ฅผ ํƒ์ง€ํ•ด์„œ ๋Œ€๋ถ€๋ถ„์˜ ๊ฒฝ์šฐ Bounding Box๋กœ ๋ฌผ์ฒด์œ„์น˜๋ฅผ ํ‘œ์‹œํ•˜๊ณ  ๋ฌด์—‡์ธ์ง€ notation์„ ํ•œ๋‹ค. ์ฃผ๋กœ VOC Pascal ๋ฐ์ดํ„ฐ์…‹์„ ์‚ฌ์šฉํ•˜๋Š”๋ฐ, ์˜์ƒ์—์„œ ๋ชจ๋“  ๋ฌผ์ฒด๋ฅผ ๋‹ค ํ‘œ๊ธฐํ•˜๊ธด ์–ด๋ ต๊ณ , ๋Œ€ํ‘œ์ ์ธ ๋ฌผ์ฒด 20๊ฐ€์ง€๋ฅผ ํƒ์ง€ํ•˜๊ฒŒ ํ•œ๋‹ค. Classification์€ ๋‹จ์ˆœํžˆ ๋ฌผ์ฒด๊ฐ€ ์˜์ƒ์— ํ•˜๋‚˜๊ฐ€ ์žˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•˜๊ณ  ๊ทธ ๋ฌผ์ฒด๊ฐ€ ๋ฌด์—‡์ธ์ง€ ๋ถ„๋ฅ˜ํ•˜๋Š” ๋ฌธ์ œ์ธ๋ฐ, ์ด์ œ ์„ฑ๋Šฅ์ด saturate๋˜์—ˆ๋‹ค. ๋ฐ˜๋ฉด Detection์€ ๋ฌผ์ฒด์œ„์น˜๋„

์ข‹์€ ์…€์นด๋ฅผ ์ฐ๋Š” ๋ฒ•
selfie

์ข‹์€ ์…€์นด๋ฅผ ์ฐ๋Š” ๋ฒ•

์ด ๊ธ€์€ Karpathy์˜ ๊ฐ„๋‹จํ•œ ์‹คํ—˜์ด ์žฌ๋ฐŒ์–ด์„œ ํ•œ๊ธ€๋กœ ์˜ฎ๊ธด ๊ธ€์ด๋‹ค. What a Deep Neural Network thinks about your #selfie ๋”ฅ๋Ÿฌ๋‹ ๋ธ”๋กœ๊ฑฐ์ธ Andrej Karpathy๊ฐ€ ๊ฐ„๋‹จํ•œ ์‹คํ—˜์„ ํ–ˆ๋‹ค. ์ข‹์€ ์…€์นด๋ž€ ๋ฌด์—‡์ผ๊นŒ? ๋ฅผ ๋”ฅ๋Ÿฌ๋‹์—์„œ CNN์œผ๋กœ ํ•™์Šตํ•˜์˜€๋‹ค. ๊ธฐ์ˆ ์ด ์ƒˆ๋กœ์šด๊ฑด ์•„๋‹Œ๋ฐ ์‹คํ—˜๋‚ด์šฉ์ด ์žฌ๋ฐŒ๋‹ค. ๋ฐ์ดํ„ฐ๋Š” Instagram์—์„œ #selfie๋กœ ํฌ๋กค๋งํ•ด์„œ ์ ์–ด๋„ ์–ผ๊ตด ํ•˜๋‚˜๋Š” ์žˆ๋Š” ์‚ฌ์ง„ 2,000,000์žฅ ์‚ฌ์ง„์„

๋ฐœ๊ฐ€๋ฝ์ด ๋‹ฎ์•˜๋‹ค: Finding Face Lookalikes using CNN ๋…ผ๋ฌธ ๊ฐœ์š”
IPIU

๋ฐœ๊ฐ€๋ฝ์ด ๋‹ฎ์•˜๋‹ค: Finding Face Lookalikes using CNN ๋…ผ๋ฌธ ๊ฐœ์š”

๋ฐœ๊ฐ€๋ฝ์ด ๋‹ฎ์•˜๋‹ค: Finding Face Lookalikes using CNN ๋…ผ๋ฌธ ๊ฐœ์š” ์ดˆ๋ก ํ•œ๋ฌธ์žฅ์”ฉ from ์„œ๋ก  ๋ณธ๋ก  ์‹คํ—˜ ๊ฒฐ๋ก  futurework 1. ์„œ๋ก  ํฅ๋ฏธ ์œ ๋ฐœ. ๋ชจํ‹ฐ๋ฒ ์ด์…˜. ์™œํ–ˆ๋Š”๊ฐ€ Face Verification, Identification ์˜ ์—ญ์‚ฌ. ์ ์šฉ ๋ถ„์•ผ. Face lookalikes Our brain compute the complex features in face and decide whether the two faces look alike or not.

nexus

Nexus7 4.3 KITKAT์œผ๋กœ Downgrade

2012๋…„๋„? ์ฏค์— ๊ทธ๋•Œ ๋‹น์‹œ ๊ฐ€์„ฑ๋น„๊ฐ€ ์ข‹๊ธฐ๋กœ ์†Œ๋ฌธ๋‚ฌ๋˜ ๋„ฅ์„œ์Šค7 1์„ธ๋Œ€๋ฅผ ์š”์ƒˆ ๋‹ค์‹œ ์‚ฌ์šฉํ•˜๋ คํ–ˆ๋‹ค. ๊ทธ๋Ÿฐ๋ฐ ๋กค๋ฆฌํŒ (์•ˆ๋“œ๋กœ์ด๋“œ v5.0)์ด ๊ณ„์† ๋ฒ„๋ฒ…์ด์ž ๊ฒฐ๊ตญ ์˜ˆ์ „ ๋ฒ„์ „ ํ‚ท์บฃ (v4.3)์œผ๋กœ ๋‚ด๋ฆฌ๊ธฐ๋กœ ๊ฒฐ์ •ํ–ˆ๋‹ค. ๊ฒฐ๊ณผ์ ์œผ๋กœ ์—„์ฒญ ๋น ๋ฆฟ๋น ๋ฆฟํ•˜๋‹ค! ๊ณผ์ •์€ ์—ฌ๊ธฐ๋ฅผ ์ฐธ๊ณ ํ–ˆ๋‹ค. ์œˆ๋„์šฐ ์ปดํ“จํ„ฐ์—์„œ Downgradeํ–ˆ๋‹ค. http://heroboyh.blog.me/220438684901 "nakasi" for Nexus 7 (Wi-Fi)

ghost

๋ธ”๋กœ๊น… ํ”Œ๋žซํผ Ghost ์‹œ์ž‘ํ•˜๊ธฐ

Tistory๋‚˜ WordPress ์—†์ด ์ง์ ‘ ๋ธ”๋กœ๊ทธ๋ฅผ ์šด์˜ํ•ด๋ณด๊ณ  ์‹ถ๋‹ค๋ฉด, Ghost๊ฐ€ ๊ต‰์žฅํžˆ ์ ํ•ฉํ•œ ํ”Œ๋žซํผ์ด ๋  ๊ฒƒ์ด๋‹ค. Node.js ๊ธฐ๋ฐ˜์ด๋ฉฐ ๋งˆํฌ๋‹ค์šด์„ ์ง€์›ํ•˜๋ฉฐ ๊ต‰์žฅํžˆ ๊ฐœ๋ฐœ์ž/์—ฐ๊ตฌ์ž์—๊ฒŒ ์ ํ•ฉํ•œ ๋ธ”๋กœ๊น… ํˆด์ธ ๊ฒƒ ๊ฐ™๋‹ค. ๊ณต์‹ ํ™ˆํŽ˜์ด์ง€๋Š” https://ghost.org ์ด๋‹ค. Node.js๋‚˜ npm์€ ์ด๋ฏธ ์„ค์น˜ ๋˜์–ด์žˆ๋‹ค๊ณ  ๊ฐ€์ •ํ•œ๋‹ค. Ghost๋Š” Node.js 0.10.xx ๋ฒ„์ „์„ ์ง€์›ํ•œ๋‹ค. Node.js ๋ฒ„์ „