Rich Model Steganalysis (SRM)
Definition
A feature-extraction approach that computes hundreds of statistical features from pixel-residual co-occurrence matrices and feeds them to an ensemble classifier such as a Fisher Linear Discriminant.
Related terms
- Blind Steganalysis
- Detection without prior knowledge of the embedding algorithm. A classifier trained on images with and without payloads generalises across multiple tools.
- Embedding Rate
- The payload size divided by the carrier capacity, usually expressed as bits per pixel. Detection difficulty decreases sharply at low embedding rates...
- False Positive Rate (FPR)
- The proportion of true non-matches (or true negatives) that a classification method declares as matches (or positives). Also called the type I...
- Steganalysis
- The forensic discipline of detecting the presence of hidden data in a carrier file. Steganalysis uses statistical tests (chi-squared, RS analysis, sample...
- Targeted Steganalysis
- Detection methods designed against a specific steganography tool or algorithm. Effective when the tool is known but fails against novel or unknown...
Explained in
- Steganalysis: Statistical Detection MethodsA feature-extraction approach that computes hundreds of statistical features from pixel-residual co-occurrence matrices and feeds them to an ensemble classifie...