geometric correction - [remote sensing] The correction of errors in remotely sensed data, ...
- Using Ground Control Point (GCP)
The GCPs should be spread evenly over the image, covering the whole image, and be placed as much as possible into the corners of the image, ...
See Also: geometric correction, rectification
[satellite imaging] The process of correcting the geometry of an image so that it appears as though each pixel were acquired from directly overhead.
(1990) Geometric correction of airborne scanner imagery by matching Delaunay triangles. International Journal of Remote Sensing 11(12): 2237-2251.
Duggin, M.J., and Robinove, C.J.
3. The calculation of new DN for pixels created during geometric correction of a digital scene, based on the values in the local area around the uncorrected pixels.
Image rubber sheeting functions allow geometric correction or registration of an image to a new coordinate system. R2V supports both Bi-linear and Delaunay triangulation methods for geometric transformation.
Often used in the geometric correction of remotely sensed images and surveying.
Image: A graphic representation or description of a scene, typically produced by an optical or electronic device.
For a correct matching, one needs a set of reliable control points in the image which are linked to map co-ordinates in accordance with the method discussed earlier This link is defined by a geometric correction model, for instance linear equations, ...
See also: Geographic, Image, GIS, Model, Information