Peak-to-correlation energy (PCE)
Definition
An extension of NCC that computes the ratio of the squared correlation peak to the energy of the surrounding correlation map. PCE produces sharper, more interpretable scores than raw NCC, particularly for small or compressed images.
Related terms
- Flat-field image
- A photograph of a uniformly illuminated surface, typically a white wall or diffuser, taken at moderate brightness to avoid saturation. Used to...
- Noise residual
- The signal remaining after a denoising filter removes the scene component from an image. For PRNU estimation, the residual approximates the sum...
- Normalised cross-correlation (NCC)
- A scalar statistic in the range -1 to 1 that measures how closely the noise residual of a query image matches a...
- Photo Response Non-Uniformity (PRNU)
- A fixed-pattern noise component caused by microscopic sensitivity differences between individual sensor pixels. PRNU is deterministic and camera-specific, making it a sensor...
- PRNU fingerprint
- Photo Response Non-Uniformity: the unique pattern of pixel-level sensitivity variations in a camera sensor, which acts as a device fingerprint. Used to...
Explained in
- Photo Response Non-Uniformity and Sensor FingerprintingAn extension of NCC that computes the ratio of the squared correlation peak to the energy of the surrounding correlation map. PCE produces sharper, more interp...