๋ณธ๋ฌธ ๋ฐ”๋กœ๊ฐ€๊ธฐ
๐Ÿš— Major Study (Bachelor)/๐ŸŸช Computer Vision

์ปดํ“จํ„ฐ ๋น„์ „ | Color Processing, Usage of HSI (Color Slicing, Color Conversion), White Balancing

by UKHYUN22 2022. 10. 5.
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Intensity Transformation, Histrogram Equalization, Spatial Filtering์€ Color ์ด๋ฏธ์ง€์— ์ ์šฉ์‹œํ‚ค๋Š” ๊ฒƒ์ด ๋ณดํŽธ์ ์ด์ง€๋Š” ์•Š๋‹ค. ๋Œ€์‹  ์šฐ๋ฆฌ๋Š” RGB ์ฑ„๋„์„ HSI์™€ YCbCr ๋ณ€ํ™˜์„ ํ•˜๊ณ  ์ ์šฉ์„ ์‹œ์ผœ์•ผ ํ•œ๋‹ค.

 

 

Hue ์ฑ„๋„์—์„œ ์›ํ•˜๋Š” ์ƒ‰์ƒ์˜ ๋ฒ”์œ„๋ฅผ ์ฐพ๋Š”๋‹ค. Saturation ์ฑ„๋„์— ์žˆ๋Š” ๋ชจ๋“  ํ”ฝ์…€์˜ ๊ฐ’์„ 0์œผ๋กœ ์ดˆ๊ธฐํ™”ํ•œ๋‹ค. ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๋ฐฉ๋ฒ•์œผ๋กœ ์›ํ•˜๋Š” ์ƒ‰์ƒ์„ ์–ป์–ด๋‚ผ ์ˆ˜ ์žˆ๋‹ค. ๋งŒ์•ฝ Color conversion์„ ํ•˜๊ณ  ์‹ถ์€ ๊ฒฝ์šฐ Hue ์ฑ„๋„์— ์ ‘๊ทผํ•˜์—ฌ ์ƒ‰์ƒ์˜ ๋ฒ”์œ„๋ฅผ ๋ณ€๊ฒฝํ•˜๋ฉด ์ ์šฉํ•  ์ˆ˜ ์žˆ๋‹ค.

 

 

์šฐ๋ฆฌ์˜ ๋ˆˆ์€ ํ‘๋ฐฑ ์‚ฌ์ง„์˜ ๊ฒฝ์šฐ 30~50 ๊ฐœ์˜ ์ฐจ์ด์  ๋งŒ์„ ๊ตฌ๋ถ„ํ•  ์ˆ˜ ์žˆ๋‹ค. ์ •๋ณด๋ฅผ ๋” ๋งŽ์ด ๋ณด๊ธฐ ์œ„ํ•ด์„œ๋Š” Gray Scale์˜ ์ด๋ฏธ์ง€๋ฅผ Color Scale๋กœ ๋ณ€ํ™˜ํ•ด์•ผ ํ•œ๋‹ค. ๊ฐ๊ฐ์˜ Intensity ๋ณ„๋กœ ์ƒ‰์ƒ์— Mapping๋˜๋Š” ๊ฒƒ์„ pseudo-coloring ์ด๋ผ๊ณ  ํ•œ๋‹ค.

 

White Balancing ์˜ ๊ฒฝ์šฐ Input Color์— ๋Œ€ํ•ด์„œ RGB ์ฑ„๋„์— ๋Œ€ํ•ด White value์˜ ํ‰๊ท  ๊ฐ’์„ 255๋กœ ๋ฐ”๊ฟ”์ฃผ๋Š” ๊ฒƒ์ด๋‹ค.