Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

NEW: EV0-Based Blending Algorithm - Now default! Preserves exact EV0 appearance with enhanced dynamic range
Smart luminance masking - Seamless highlight and shadow detail recovery

Optimized for 8-bit input workflow - Removed unnecessary 8-bit conversion since inputs are already 8-bit
Enhanced 16-bit linear output - Improved scaling algorithm for better 16-bit range utilization
Changed default algorithm - EV0-Based is now default instead of Mertens for natural results

CRITICAL: Fixed contrast issues - EV0-Based algorithm maintains original image contrast
CRITICAL: Fixed color inversion issues - Added proper BGR↔RGB conversion for correct color handling
Fixed brightness problems - Improved scaling and algorithm selection
Added Mertens Exposure Fusion algorithm - Alternative for Lightroom-style results
Added Robertson algorithm - Alternative HDR method for different use cases
Enhanced algorithm selection - Users can choose between EV0-Based (default), Mertens, Debevec, and Robertson
CRITICAL: Fixed Debevec algorithm issues - Added Reinhard tone mapping to fix brightness/color inversion
Improved Debevec output - Now produces natural results similar to Mertens
Enhanced per-algorithm scaling - Different scaling strategies for different algorithms

CRITICAL: Fixed HDR processing for proper linear colorspace output
Fixed 8-bit input requirement for OpenCV HDR functions (createMergeDebevec expects 8-bit input)
Added proper gamma correction preprocessing (sRGB to linear conversion before HDR processing)
Improved HDR data preservation - no longer clips values to 0-1 range, preserves HDR information
Enhanced error handling and logging for better debugging of HDR processing issues
Fixed color artifacts in HDR output by proper colorspace handling
Added linear colorspace validation to ensure proper scene radiance recovery

Luminance Stack Processor (3 Stops) - Professional HDR processing node for merging EV+2, EV+0, EV-2 exposures
Luminance Stack Processor (5 Stops) - Professional HDR processing node for merging EV+4, EV+2, EV+0, EV-2, EV-4 exposures
Debevec Algorithm Implementation - Industry-standard HDR reconstruction using Paul Debevec's method
16-bit Output Support - Maximum dynamic range preservation in final images
Automatic Camera Response Function Estimation - Intelligent sensor response curve calculation
Configurable Exposure Steps - Adjustable EV step sizes for different capture methods
Error Handling & Fallbacks - Graceful degradation with middle exposure fallback
Professional Documentation - Complete README, installation guide, and usage examples
Modern Python Packaging - Full pyproject.toml configuration with semantic versioning
Comprehensive Testing - Unit tests for core HDR processing functionality
ComfyUI Integration - Seamless tensor format handling and node registration

This project follows Semantic Versioning: