Pinhole camera model
lastmod 2024-07-03created 2023-10-265 edits
The pinhole camera model describes the mathematical relationship between the coordinates of a point in three-dimensional space and its projection onto the image plane of an ideal pinhole camera, where the camera aperture is described as a point and no lenses are used to focus light.
About
A pinhole is, literally, a very small hole, like one punched in paper with a pin. A camera that takes pictures by receiving the light coming in through a pinhole is called a pinhole camera. It is also commonly called a 'needle-hole camera'. The pinhole camera model is useful for observing the structure by which light reflected from an object passes through the crystalline lens of our eye (or a camera's lens) and reaches the retina (or a camera's sensor).
단, 핀홀 카메라에서는 빛이 아주 작은 구멍을 거쳐서 들어오기 때문에 빛을 모으기에는 부적합하다. 따라서 일반적인 카메라는 핀홀이 아닌 렌즈를 이용한다. 그러나 렌즈를 사용하게 되면 카메라의 구조가 복잡해지며 렌즈 자체의 왜곡으로 인하여 영상이 손상될 수 있다.
The principle of a pinhole camera is as follows. When light reflects off a point on an object in the three-dimensional real world, among the rays at various angles only the ray heading toward the pinhole passes through without being blocked by the pinhole plane. As a result, this ray forms an image on what is called the image plane or the projective plane. The size of this image is determined by the pinhole camera's focal length. For an ideal pinhole camera, the focal length is the distance from the pinhole to the image plane.
Pinhole-camera-model.png
OpenCV:calib3d
Pinhole_camera_model.png
See also
- Camera
- Closed-circuit television (CCTV)
- Field of view; (FoV)
- Camera Calibration
- Perspective transform
- Fisheye camera model