![post-thumbnail](https://velog.velcdn.com/images/jungizz_/post/1e9a5a8d-0fc2-4151-b3ca-e1bfe4b654c8/image.jpeg)
1. Image
- 특정 시간, 특정 방향의 빛의 Snapshot (시각적 자극을 비슷하게 나타냄)
- 사진이나 2차원 그림처럼 시각적 자극을 속이기 위해 만든 인공물
- Distributed amplitude of colors
- 2D function
- 시각적 자극의 강도(intensity / amplitude)를 나타내는 함수f(x, y)
- (x, y)는 2D 위치
2. Digital Image
- 이미지가 디지털 형태로 저장됨 (digital form / binary form)
- Digitization (이미지를 디지털로 바꾸는 방법)
1. Raster(Bitmapped) Image
- Finite set of digital values (Picture elements / pixels)
- JPEG, PNG, GIF …
2. Vector Image
- 2D 평면에 어떻게 그림을 그릴 것인지에 대한 방법이 저장 (lines, polygons, circles, curves…)
- Vecotor font, SVG, AI …
- 디지털 이미지의 장단점
- 장점
- Easy reproduction (그리기 쉬움)
- Fine detail (정보 디테일 많음)
- Easy to access a part
- Easy to modify globally (전체 수정 쉬움)
- 단점
- Large data
- Limited resolution (Bad for scaling)
- Hard to modify locally
3. Invisible Light Imaging
- Electromagnetic energy spectrum
![](https://velog.velcdn.com/images/jungizz_/post/0c53d41b-8d90-414d-8855-4635218b0a60/image.png)
- Gamma-Ray
![](https://velog.velcdn.com/images/jungizz_/post/25b484eb-fb23-4d8f-b33c-7ce173022769/image.png)
- X-Ray
![](https://velog.velcdn.com/images/jungizz_/post/0c738433-93db-4e97-8fad-0aafbd62bad0/image.png)
- Ultra-violet band (자외선)
![](https://velog.velcdn.com/images/jungizz_/post/8e2eff26-a641-4e2d-a551-75812b46e72c/image.png)
- Visible + Infrared band (가시광선 + 적외선)
![](https://velog.velcdn.com/images/jungizz_/post/ea9d68d8-1bf3-4644-905e-3a7cbfee13d3/image.png)
- Microwave band
![](https://velog.velcdn.com/images/jungizz_/post/dc792753-3f4a-4cfe-9500-f5d29ffd25fc/image.png)
4. Digital Image Processing
- 사람이 해석할 수 있도록 이미지 정보를 개선
- 저장, 전송, 자율 시스템 인식을 위한 표현
- Fundamental Levels (Low level - 영처 / Mid, High level - 컴비)
![](https://velog.velcdn.com/images/jungizz_/post/3bee1738-6a01-47d8-b7a9-81dbf4c07164/image.png)
- Key Stages in DIP
- Image Acputstion (이미지 입력)
![](https://velog.velcdn.com/images/jungizz_/post/da6f063a-62a7-47db-9e9d-e51d24e97e3c/image.png)
- Image Enhancement (이미지 향상) - 저화질을 고화질로
![](https://velog.velcdn.com/images/jungizz_/post/c16e3caa-399c-4ad5-8e0e-e5231ca36ebb/image.png)
- Image Restoration (이미지 복원)
![](https://velog.velcdn.com/images/jungizz_/post/d2f83a2b-328b-4572-a114-86dbb807f2eb/image.png)
- Morphological Precessing
![](https://velog.velcdn.com/images/jungizz_/post/bcefa497-351a-42b1-91b3-d8332a02332d/image.png)
- Segmentation (영상 분할) - 이미지 내에 있는 객체들을 의미있는 단위로 분할
![](https://velog.velcdn.com/images/jungizz_/post/06529d9c-f9ac-4f50-86d8-f1ada19b0949/image.png)
- Object Recognition (객체 인식)
![](https://velog.velcdn.com/images/jungizz_/post/df41dca7-be31-4a65-b19e-8ae89c04ffa2/image.png)
- Representation & Description
![](https://velog.velcdn.com/images/jungizz_/post/45a162ac-f5a2-4016-9edc-cfe39f6cbef2/image.png)