Constrain Resolution

Intelligently resizes images to fit within resolution constraints while preserving aspect ratio. Perfect for preparing images for AI models with specific dimension requirements. 💡 USAGE TIPS: • Use 'Prioritize Min Resolution' to ensure images are never too small (may exceed max on one dimension) • Use 'Prioritize Max Resolution (Strict)' for hard VRAM limits (may go below min on one dimension) • Set 'Multiple Of' to 2 for most models, or higher values (8, 16, 32, 64) for optimal performance • 'lanczos' or 'bicubic' resize methods give the sharpest results; 'bilinear' is the fastest • 'Crop as Required' is enabled by default for immediate compatibility with strict dimension requirements • The node outputs both the resized image and the original for workflow flexibility

By EnragedAntelope·Created 2 years ago·Updated about 7 hours ago· 11

image

resized_image
original_image
width
height
final_aspect_ratio
original_aspect_ratio

◄min_res704►

◄max_res1280►

◄multiple_of2►

◄resize_methodlanczos►

◄constraint_modePrioritize Min Resolution►

◄crop_as_requiredtrue►

◄crop_positioncenter►

Categoryimage/resolution

Inputs (8)

Name	Type	Default	Description
image	IMAGE		Input image to analyze and resize
min_res	INT	7041–65536	Minimum resolution in pixels for width and height. Images smaller than this will be upscaled.
max_res	INT	12801–65536	Maximum resolution in pixels for width and height. Images larger than this will be downscaled.
multiple_of	INT	21–256	Ensures output dimensions are multiples of this number. Common values: 2 (most models), 8, 16, 32, or 64 (optimal performance). Set to 1 to disable rounding.
resize_method	COMBO	lanczos	Interpolation method used when resizing. • lanczos: Sharpest results, best overall quality (default) • bicubic: High quality, slightly softer than lanczos • bilinear: Fast, slightly soft • nearest-exact: No interpolation — for pixel art or masks • area: Good for large downscales
constraint_mode	COMBO	Prioritize Min Resolution	How to handle conflicts when extreme aspect ratios make it impossible to satisfy both min and max. • Prioritize Min Resolution: Ensures neither dimension falls below min_res (may exceed max_res) • Prioritize Max Resolution (Strict): Strictly enforces max_res limit (may go below min_res)
crop_as_required	BOOLEAN	true	Enable cropping to achieve exact target dimensions when rounding causes aspect ratio changes. Disable if preserving the entire image is more important than exact dimensions.
crop_position	COMBO	center	Where to crop from when 'Crop as Required' is enabled. • center: Crop equally from all sides • top: Keep top portion, crop from bottom • bottom: Keep bottom portion, crop from top • left: Keep left portion, crop from right • right: Keep right portion, crop from left

Outputs (6)

Name	Type	Description
resized_image	IMAGE	Image resized to the constrained dimensions
original_image	IMAGE	Original image passed through unchanged for workflow flexibility
width	INT	Final width after constraints and rounding
height	INT	Final height after constraints and rounding
final_aspect_ratio	FLOAT	Aspect ratio of the output image (width/height)
original_aspect_ratio	FLOAT	Aspect ratio of the input image for comparison