39 lines
1.0 KiB
Python
39 lines
1.0 KiB
Python
from __future__ import annotations
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import numpy as np
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from backend.node_registry import register_node
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from backend.data_types import DataField
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@register_node(display_name="Fix Zero")
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class FixZero:
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"field": ("DATA_FIELD",),
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"method": (["min", "mean", "median"],),
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}
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}
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OUTPUTS = (
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('DATA_FIELD', 'zeroed'),
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)
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FUNCTION = "process"
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DESCRIPTION = (
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"Shift data so that the minimum (or mean/median) is zero. "
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"Equivalent to fix_zero in Gwyddion's level.c."
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)
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def process(self, field: DataField, method: str) -> tuple:
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data = field.data.copy()
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if method == "min":
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data -= data.min()
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elif method == "mean":
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data -= data.mean()
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elif method == "median":
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data -= np.median(data)
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else:
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raise ValueError(f"Unknown method: {method}")
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return (field.replace(data=data),)
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