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# ComfyUI Image Resizing
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# ComfyUI Image Resizing
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*Precision dimension control nodes for aspect ratio adjustments and resizing workflows*
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---
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## Core Features
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### 📐 Aspect Ratio Calculations
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- `calculate_aspect_ratio_extension`
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`►` Computes required pixel extension to match target proportions
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`►` Outputs integer value for direct pipeline integration
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### 📐 Analysis & Calculation
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- `image_aspect_ratio_extractor` - Extract aspect ratios with constraints (0.25-4.0 range)
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- `image_resolution_extractor` - Extract specific dimensions (width, height, shortest/longest side)
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- `calculate_aspect_ratio_extension` - Compute pixel extensions for target aspect ratios
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- `calculate_upscale_factor` - Determine optimal scaling ratios
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- `calculate_upscale_rounds` - Calculate iteration count for multi-stage upscaling
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### 🔢 Scaling Mathematics
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- `calculate_upscale_factor`
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`►` Determines optimal scaling ratio between source/target dimensions
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- `calculate_upscale_rounds`
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`►` Calculates iteration count for multi-stage upscaling (requires IF node)
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### 🔧 Resizing & Cropping
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- `resize_to_multiple` - Resize images to multiples of specified numbers (stretch/crop)
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- `image_crop_by_percentage` - Precision cropping with percentage/pixel controls
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- `mask_crop_by_percentage` - Synchronized mask cropping with detection modes
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- `extend_canvas_by_percentage` - Expand canvas with color fill and feathering
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### 🖌️ Canvas Manipulation
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- `extend_canvas_by_percentage`
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`►` Expand canvas using % or absolute pixels (`use_pixels` toggle)
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- `image_crop_by_percentage`
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`►` Precision cropping with %/pixel unit switching
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- `mask_crop_by_percentage`
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`►` Synchronized mask cropping with identical controls
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## Key Features
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- **Mathematical Precision** - Pixel-perfect calculations with rounding control
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- **Dual Measurement Modes** - Seamless percentage ↔ pixel conversion
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- **Non-Destructive Workflow** - All operations preserve source data
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- **Advanced Detection** - Mask-based cropping with multiple detection algorithms
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---
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## Installation
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## Key Advantages
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- **Pixel-Perfect Precision**
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`▸` Mathematical dimension calculations
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`▸` Rounding control for production pipelines
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- **Dual Measurement Modes**
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`▸` Seamless percentage ↔ pixel conversion
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`▸` Unit toggling without breaking workflows
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- **Non-Destructive Workflow**
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`▸` All operations preserve source data
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`▸` Chainable outputs for complex transforms
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1. Clone to your ComfyUI `custom_nodes` directory:
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```
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ComfyUI/custom_nodes/image-resizing/
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```
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---
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2. Restart ComfyUI
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## Nodes Overview
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### Analysis Nodes
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- **Aspect Ratio Extractor**: Extracts ratios with constraints, supports rounding to common ratios
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- **Resolution Extractor**: Extracts width, height, shortest, or longest side dimensions
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- **Aspect Ratio Extension**: Calculates pixel extensions needed for target aspect ratios
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- **Upscale Factor**: Determines optimal scaling ratios between source/target dimensions
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- **Upscale Rounds**: Calculates iteration count for multi-stage upscaling workflows
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### Processing Nodes
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- **Resize to Multiple**: Resizes images to multiples of specified numbers (32, 64, etc.)
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- **Image Crop by Percentage**: Precision cropping with 9 position options and offset controls
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- **Mask Crop by Percentage**: Advanced mask-based cropping with detection algorithms
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- **Extend Canvas by Percentage**: Expands canvas with color fill, feathering, and mask support
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## Typical Use Cases
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Content preparation:
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○ Adapt assets for specific aspect ratios
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○ Create social media templates
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○ Match AI model input requirements
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- Adapting assets for specific aspect ratios
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- Creating social media templates
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- Matching AI model input requirements
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- Batch canvas extensions and cropping
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- Multi-stage upscale preparations
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Production workflows:
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○ Batch canvas extensions
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○ Multi-stage upscale preparations
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○ Mask-accurate image editing
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## Requirements
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- ComfyUI
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- Standard ComfyUI dependencies
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## License
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This project is provided as-is for the ComfyUI community.
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+33
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from .nodes.image_crop_by_percentage import ImageCropByPercentage
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from .nodes.mask_crop_by_percentage import MaskCropByPercentage
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from .nodes.extend_canvas_by_percentage import ExtendCanvasByPercentage
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from .nodes.calculate_aspect_ratio_extension import CalculateAspectRatioExtension
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from .nodes.calculate_upscale_factor import CalculateUpscaleFactor
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from .nodes.calculate_upscale_rounds import CalculateUpscaleRounds
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NODE_CLASS_MAPPINGS = {
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"ImageCropByPercentage": ImageCropByPercentage,
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"MaskCropByPercentage": MaskCropByPercentage,
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"ExtendCanvasByPercentage": ExtendCanvasByPercentage,
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"CalculateAspectRatioExtension": CalculateAspectRatioExtension,
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"CalculateUpscaleFactor": CalculateUpscaleFactor,
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"CalculateUpscaleRounds": CalculateUpscaleRounds,
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}
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NODE_DISPLAY_NAME_MAPPINGS = {
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"ImageCropByPercentage": "Image Crop By Percentage",
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"MaskCropByPercentage": "Mask Crop By Percentage",
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"ExtendCanvasByPercentage": "Extend Canvas By Percentage",
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"CalculateAspectRatioExtension": "Calculate Aspect Ratio Extension",
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"CalculateUpscaleFactor": "Calculate Upscale Factor",
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"CalculateUpscaleRounds": "Calculate Upscale Rounds",
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}
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from .nodes.image_crop_by_percentage import ImageCropByPercentage
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from .nodes.mask_crop_by_percentage import MaskCropByPercentage
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from .nodes.extend_canvas_by_percentage import ExtendCanvasByPercentage
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from .nodes.calculate_aspect_ratio_extension import CalculateAspectRatioExtension
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from .nodes.calculate_upscale_factor import CalculateUpscaleFactor
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from .nodes.calculate_upscale_rounds import CalculateUpscaleRounds
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from .nodes.resize_to_multiple import ResizeToMultiple
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from .nodes.image_resolution_extractor import ImageResolutionExtractor
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from .nodes.image_aspect_ratio_extractor import ImageAspectRatioExtractor
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NODE_CLASS_MAPPINGS = {
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"ImageCropByPercentage": ImageCropByPercentage,
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"MaskCropByPercentage": MaskCropByPercentage,
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"ExtendCanvasByPercentage": ExtendCanvasByPercentage,
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"CalculateAspectRatioExtension": CalculateAspectRatioExtension,
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"CalculateUpscaleFactor": CalculateUpscaleFactor,
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"CalculateUpscaleRounds": CalculateUpscaleRounds,
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"ResizeToMultiple": ResizeToMultiple,
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"ImageResolutionExtractor": ImageResolutionExtractor,
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"ImageAspectRatioExtractor": ImageAspectRatioExtractor,
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}
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NODE_DISPLAY_NAME_MAPPINGS = {
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"ImageCropByPercentage": "Image Crop By Percentage",
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"MaskCropByPercentage": "Mask Crop By Percentage",
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"ExtendCanvasByPercentage": "Extend Canvas By Percentage",
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"CalculateAspectRatioExtension": "Calculate Aspect Ratio Extension",
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"CalculateUpscaleFactor": "Calculate Upscale Factor",
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"CalculateUpscaleRounds": "Calculate Upscale Rounds",
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"ResizeToMultiple": "Resize To Multiple",
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"ImageResolutionExtractor": "Image Resolution Extractor",
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"ImageAspectRatioExtractor": "Image Aspect Ratio Extractor",
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}
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