Technical Report v1.8: Block-Level Quality Component Feature Extraction — Definitions and Implementation

This document is the technical specification for DOI 1.8 of the Merutan Theory series. It defines the eight internal block-level quality components (`comp_*`) and two supplementary frequency-domain descriptors computed per 8x8 block throughout the Merutan Theory technical report series (DOI 1.0-1.7). These definitions were previously implemented in the reference code (`import_ground_truth_data.py`) but had not been formally documented in any prior DOI. This report closes that gap by providing an authoritative specification for reference by future Merutan Theory work. Dataset and Mandatory Citation:- Source: NIH ChestX-ray8 (Hospital-scale chest x-ray database)- Citation: Wang, X., Peng, Y., Lu, L., Lu, Z., Bagheri, M., & Summers, R. M. (2017). "ChestX-ray8: Hospital-scale chest x-ray database and benchmarks on weakly-supervised classification and localization of common thoracic diseases." Proceedings of the IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 3462–3471. - Download: https://nihcc.app.box.com/v/ChestXray-NIHCC Contact : s.shiny.n.works@gmail.com