Object detection - Songwooseok123/Study_Space GitHub Wiki

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Object detection

์ •์˜

  • ๋‹ค์ˆ˜์˜ ์‚ฌ๋ฌผ ์กด์žฌํ•˜๋Š” ์ƒํ™ฉ์—์„œ ๊ฐ ์‚ฌ๋ฌผ์˜ ์œ„์น˜์™€ ํด๋ž˜์Šค๋ฅผ ์ฐพ๋Š” ์ž‘์—….
  • classfication + Localization(with bounding box)

์ข…๋ฅ˜

![image](https://github.com/Songwooseok123/Study_Space/assets/80091008/a65448dd-22b6-478f-822d-845415d7f816)

  • ์ง์„  ๊ธฐ์ค€ ์œ„์ชฝ์ด 2-stage, ๋ฐ‘์—๊ฐ€ 1-stage์ž„.

1-stage detector

image-> feature extractor-> classification,regression

  • ์œ„์น˜๋ฅผ ์ฐพ๋Š” ๋ฌธ์ œ์™€ ๋ถ„๋ฅ˜ ๋ฌธ์ œ๋ฅผ ํ•œ๋ฒˆ์— ํ•ด๊ฒฐํ•œ๋‹ค. ์†๋„๋Š” ๋” ๋น ๋ฅด์ง€๋งŒ ์ •ํ™•๋„๋Š” ๋‚ฎ๋‹ค.
  • ex)

2-stage detector

  • image-> 1.region proposals-> 2(feature extractor-> classification, regression)
![image](https://github.com/Songwooseok123/Study_Space/assets/80091008/2c075eca-ec7b-45aa-8d97-fbad654b8322)

ํŠธ๋ ŒํŠธ

RCNN๊ณ„์—ด์˜ ๋ชจ๋ธ๋“ค์€ ์ผ์ • ์ˆ˜์ค€์˜ ์ •ํ™•์„ฑ์€ ์žˆ์œผ๋‚˜ ์‹ค์ œ ์ ์šฉํ•˜๊ธฐ์— ์‹ ์†์„ฑ์ด ๋–จ์–ด์ง -> ์–ด๋А์ •๋„ ์ •ํ™•์„ฑ, ์‹ ์†์„ฑ ๊ฐ€์ง€๋Š” YOLO๋‚˜ SSD

์ •ํ™•๋„ ์ธก์ • ๋ฐฉ๋ฒ•

Average Precision

-๋ฐ‘์— ๋นจ๊ฐ„์ƒ‰ ๊ทธ๋ž˜ํ”„์˜ ๋ฐ‘์— ๋ถ€๋ถ„ ๋„“์ด์ž„.

![image](https://github.com/Songwooseok123/Study_Space/assets/80091008/888b0443-e78a-4d66-af1e-60070d13172a)

  • Mean Average Precision:๋ชจ๋“  class์— ๋Œ€ํ•œ AP ํ‰๊ท 
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