This module provides comprehensive flat field calibration functions for ERIS IFU data. It supports multiple flat field processing modes (FAST, HDRL, SEGMENT) and handles lamp-on/off frame subtraction, bad pixel mask creation, quality control parameter calculation, and various image processing operations for flat field normalization.

Key features:

• Multiple flat field modes: FAST (quick processing), HDRL (HDRL library-based), SEGMENT (segmented processing for specific detector regions)
• Bad pixel mask generation using 2D and 3D detection methods
• Column tilt removal for detector systematic effects
• Median filtering and noise reduction
• Quality control (QC) parameter calculation
• Support for both FLAT_LAMP and FLAT_NS (nodding sky) observations