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: Natural Blend 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 - Natural Blend is now default instead of Mertens for natural results

🆕 HDR Export Node - Dedicated EXR export node that preserves full HDR dynamic range
True HDR file output - EXR files maintain values above 1.0 without normalization
ComfyUI-style interface - Filename prefix and output path inputs like built-in save nodes
HDR verification - Automatic verification that HDR data is preserved in exported files

🚨 CRITICAL: Fixed Debevec color inversion - Proper RGB↔BGR conversion fixes inverted colors completely
🚨 CRITICAL: Perfect VFX flat log profile - Research-based implementation with 18% gray scaling
Fixed sRGB to Linear conversion - Proper gamma correction applied at correct stage for camera response
VFX Pipeline compliance - Debevec now outputs professional flat, desaturated appearance (CORRECT)
Removed tone mapping completely - Raw linear radiance preserved for professional color pipeline
Created proper HDR workflow - Use HDR Export Node instead of built-in save nodes for EXR
🆕 CLEAN FILENAME INTERFACE - No more automatic timestamps! Professional filename control like standard ComfyUI nodes

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: