Affine transform estimation
Definition
The recovery of the geometric transformation (rotation, scaling, shear) relating a copied region to its source, using matched keypoint pairs. Geometrically consistent matching across a region confirms that the same content appears in two places.
Related terms
- Chromatic aberration
- Colour fringing at high-contrast edges caused by differential refraction of light wavelengths by a lens. The pattern is lens-specific and inconsistent across...
- Copy-move forgery
- A manipulation that clones a region from within the same image and pastes it elsewhere, typically to hide an object or repeat...
- Noiseprint
- A CNN-based camera-model fingerprint extractor by Cozzolino and Verdoliva. Applied to deepfakes, it reveals inconsistency between the camera fingerprint in the genuine...
- SIFT (Scale-Invariant Feature Transform)
- A keypoint detection and description algorithm that extracts local feature descriptors invariant to scale, rotation, and partial illumination change, enabling matching of...
- Splicing
- A manipulation that inserts content from a completely different source image into the target, producing a composite that may look coherent but...
Explained in
- Copy-Move and Splicing DetectionThe recovery of the geometric transformation (rotation, scaling, shear) relating a copied region to its source, using matched keypoint pairs. Geometrically con...