Mask Batch Blend

Mask Batch Blend

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Overview

The Mask Batch Blend node blends multiple masks together using different operations (add, max, average). It can handle masks with different dimensions and batch sizes.

• Class name: zyd232 MaskBatchBlend
• Category: zyd232 Nodes
• Output: MASK

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Inputs

Input	Type	Description
masks	MASK	Masks to blend (supports batches)
operation	["add", "max", "average"]	Blend operation

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Output

Output	Type	Description
MASK	MASK	The blended single mask

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How It Works

The node automatically handles the input tensor dimensions:

• 2D tensor (height, width) — a batch dimension is added automatically.
• 4D tensor (batch, 1, height, width) — the channel dimension is removed automatically.
• Other shapes raise an error.

Blend operations

Operation	Description
add	Sums all masks together (overlay effect)
max	Takes the maximum value at each pixel across all masks
average	Computes the average of all masks

Edge cases

• Batch size 0 (no masks) — returns an all-zero mask.
• Batch size 1 (only one mask) — returns that mask directly without blending.

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Usage Examples

• Overlay multiple selections: use add to stack multiple masks into a brighter combined selection.
• Union: use max to keep any region covered by at least one mask.
• Smooth transition: use average to get the average intensity of multiple masks.

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