Violating rotating camera geometry: The effect of radial distortion on self-calibration
In this paper we show that radial distortion of images invalidates the geometric constraint on which self-calibration of a rotating camera is based - that 3D lines drawn between matched features all intersect at the rotation centre. We develop a geometric picture showing how radial distortion violat...
| Main Authors: | , |
|---|---|
| Format: | Conference item |
| Published: |
2000
|
| _version_ | 1797085446391463936 |
|---|---|
| author | Tordoff, B Murray, D |
| author_facet | Tordoff, B Murray, D |
| author_sort | Tordoff, B |
| collection | OXFORD |
| description | In this paper we show that radial distortion of images invalidates the geometric constraint on which self-calibration of a rotating camera is based - that 3D lines drawn between matched features all intersect at the rotation centre. We develop a geometric picture showing how radial distortion violates this constraint and discuss the implications for self-calibration of a rotating camera. In particular we show that the behaviour of self-calibration is markedly different for pin-cushion and barrelling distortion, the latter causing self-calibration to be unreliable or to fail completely. A method is presented for automatically estimating the radial distortion over a sequence of images, when both distortion and camera internal parameters vary. We discuss when such an approach will work and whether accurate automatic calibration of a rotating camera is really possible. Keywords: self-calibration, radial distortion © 2000 IEEE. |
| first_indexed | 2024-03-07T02:09:08Z |
| format | Conference item |
| id | oxford-uuid:9ffff23b-bf51-445e-8522-17b998c16e17 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T02:09:08Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:9ffff23b-bf51-445e-8522-17b998c16e172022-03-27T02:02:15ZViolating rotating camera geometry: The effect of radial distortion on self-calibrationConference itemhttp://purl.org/coar/resource_type/c_5794uuid:9ffff23b-bf51-445e-8522-17b998c16e17Symplectic Elements at Oxford2000Tordoff, BMurray, DIn this paper we show that radial distortion of images invalidates the geometric constraint on which self-calibration of a rotating camera is based - that 3D lines drawn between matched features all intersect at the rotation centre. We develop a geometric picture showing how radial distortion violates this constraint and discuss the implications for self-calibration of a rotating camera. In particular we show that the behaviour of self-calibration is markedly different for pin-cushion and barrelling distortion, the latter causing self-calibration to be unreliable or to fail completely. A method is presented for automatically estimating the radial distortion over a sequence of images, when both distortion and camera internal parameters vary. We discuss when such an approach will work and whether accurate automatic calibration of a rotating camera is really possible. Keywords: self-calibration, radial distortion © 2000 IEEE. |
| spellingShingle | Tordoff, B Murray, D Violating rotating camera geometry: The effect of radial distortion on self-calibration |
| title | Violating rotating camera geometry: The effect of radial distortion on self-calibration |
| title_full | Violating rotating camera geometry: The effect of radial distortion on self-calibration |
| title_fullStr | Violating rotating camera geometry: The effect of radial distortion on self-calibration |
| title_full_unstemmed | Violating rotating camera geometry: The effect of radial distortion on self-calibration |
| title_short | Violating rotating camera geometry: The effect of radial distortion on self-calibration |
| title_sort | violating rotating camera geometry the effect of radial distortion on self calibration |
| work_keys_str_mv | AT tordoffb violatingrotatingcamerageometrytheeffectofradialdistortiononselfcalibration AT murrayd violatingrotatingcamerageometrytheeffectofradialdistortiononselfcalibration |