95 lines
4.8 KiB
Markdown
95 lines
4.8 KiB
Markdown
# Changelog
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
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and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
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## [Unreleased]
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### Added
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- **NEW: Natural Blend Algorithm** - Now default! Preserves exact EV0 appearance with enhanced dynamic range
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- **Smart luminance masking** - Seamless highlight and shadow detail recovery
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### Changed
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- **Optimized for 8-bit input workflow** - Removed unnecessary 8-bit conversion since inputs are already 8-bit
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- **Enhanced 16-bit linear output** - Improved scaling algorithm for better 16-bit range utilization
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- **Changed default algorithm** - Natural Blend is now default instead of Mertens for natural results
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### Added
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- **🆕 HDR Export Node** - Dedicated EXR export node that preserves full HDR dynamic range
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- **True HDR file output** - EXR files maintain values above 1.0 without normalization
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- **ComfyUI-style interface** - Filename prefix and output path inputs like built-in save nodes
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- **HDR verification** - Automatic verification that HDR data is preserved in exported files
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### Fixed
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- **🚨 CRITICAL: Fixed Debevec color inversion** - Proper RGB↔BGR conversion fixes inverted colors completely
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- **🚨 CRITICAL: Perfect VFX flat log profile** - Research-based implementation with 18% gray scaling
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- **Fixed sRGB to Linear conversion** - Proper gamma correction applied at correct stage for camera response
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- **VFX Pipeline compliance** - Debevec now outputs professional flat, desaturated appearance (CORRECT)
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- **Removed tone mapping completely** - Raw linear radiance preserved for professional color pipeline
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- **Created proper HDR workflow** - Use HDR Export Node instead of built-in save nodes for EXR
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- **🆕 CLEAN FILENAME INTERFACE** - No more automatic timestamps! Professional filename control like standard ComfyUI nodes
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## [1.0.1] - 2025-01-20
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### Fixed
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- **CRITICAL: Fixed HDR processing for proper linear colorspace output**
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- **Fixed 8-bit input requirement for OpenCV HDR functions** (createMergeDebevec expects 8-bit input)
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- **Added proper gamma correction preprocessing** (sRGB to linear conversion before HDR processing)
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- **Improved HDR data preservation** - no longer clips values to 0-1 range, preserves HDR information
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- **Enhanced error handling and logging** for better debugging of HDR processing issues
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- **Fixed color artifacts** in HDR output by proper colorspace handling
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- **Added linear colorspace validation** to ensure proper scene radiance recovery
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### Technical Improvements
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- Added proper sRGB to linear gamma correction before HDR processing
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- Implemented 99.9th percentile normalization to handle extreme HDR values
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- Enhanced logging with detailed HDR processing information
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- Added validation for image format and HDR output quality
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- Improved fallback handling with proper linear space conversion
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## [1.0.0] - 2025-01-20
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### Added
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- **Luminance Stack Processor (3 Stops)** - Professional HDR processing node for merging EV+2, EV+0, EV-2 exposures
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- **Luminance Stack Processor (5 Stops)** - Professional HDR processing node for merging EV+4, EV+2, EV+0, EV-2, EV-4 exposures
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- **Debevec Algorithm Implementation** - Industry-standard HDR reconstruction using Paul Debevec's method
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- **16-bit Output Support** - Maximum dynamic range preservation in final images
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- **Automatic Camera Response Function Estimation** - Intelligent sensor response curve calculation
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- **Configurable Exposure Steps** - Adjustable EV step sizes for different capture methods
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- **Error Handling & Fallbacks** - Graceful degradation with middle exposure fallback
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- **Professional Documentation** - Complete README, installation guide, and usage examples
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- **Modern Python Packaging** - Full pyproject.toml configuration with semantic versioning
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- **Comprehensive Testing** - Unit tests for core HDR processing functionality
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- **ComfyUI Integration** - Seamless tensor format handling and node registration
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### Technical Features
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- OpenCV-based HDR processing pipeline
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- Automatic image alignment preparation
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- Memory-efficient processing with cleanup
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- Detailed logging for debugging
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- Cross-platform compatibility (Windows, Linux, macOS)
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### Dependencies
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- OpenCV >= 4.8.0 (only external dependency)
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- NumPy and PyTorch provided by ComfyUI
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- Python 3.8+ support
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---
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## Version Numbering
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This project follows [Semantic Versioning](https://semver.org/):
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- **MAJOR** version when you make incompatible API changes
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- **MINOR** version when you add functionality in a backward compatible manner
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- **PATCH** version when you make backward compatible bug fixes
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### Version History Guidelines
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- **1.x.x** - Stable production releases with Debevec HDR algorithm
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- **0.x.x** - Pre-release/beta versions (not used in this project)
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- **x.x.0** - Major feature releases
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- **x.x.1+** - Bug fixes and minor improvements
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