GRIME AI Feature Extraction Validation

Validation evidence for the GRIME AI feature extraction module. Synthetic test images with known analytical properties are processed through GRIME AI and results are compared against expected values. Includes analytical validation of intensity, Shannon entropy, GCC, and ExG metrics using pure-color images, and directional validation of GLCM, Gabor, LBP, and Fourier descriptors using synthetic image pairs. Contains the validation script, formal test plan, synthetic test images, and CSV results from a validation run conducted on 2026-03-27.