89d8f4f464
Color inversion effect using new PEP 723 format: - Inverts pixel values (255 - pixel) - Intensity parameter for blending (0.0-1.0) - Supports parameter binding to analysis data Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
68 lines
1.4 KiB
Python
68 lines
1.4 KiB
Python
# /// script
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# requires-python = ">=3.10"
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# dependencies = ["numpy"]
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# ///
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"""
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@effect invert
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@version 1.0.0
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@author @giles@artdag.rose-ash.com
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@temporal false
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@description
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Inverts video colors. Each pixel value is subtracted from 255,
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creating a photographic negative effect.
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@param intensity float
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@range 0.0 1.0
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@default 1.0
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Blend between original (0.0) and fully inverted (1.0).
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@example
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(fx invert)
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@example
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(fx invert :intensity 0.5)
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@example
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(fx invert :intensity (bind analysis :energy :range [0.3 1.0]))
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"""
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import numpy as np
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from artdag.effects import EffectMeta, ParamSpec
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META = EffectMeta(
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name="invert",
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version="1.0.0",
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temporal=False,
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params=[
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ParamSpec("intensity", float, default=1.0, range=(0.0, 1.0)),
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],
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)
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def process_frame(frame: np.ndarray, params: dict, state) -> tuple:
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"""
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Invert frame colors.
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Args:
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frame: RGB frame as numpy array (H, W, 3)
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params: {"intensity": 0.0-1.0}
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state: Unused, passed through
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Returns:
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(inverted_frame, state)
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"""
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intensity = params.get("intensity", 1.0)
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# Invert: 255 - pixel
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inverted = 255 - frame
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# Blend based on intensity
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if intensity < 1.0:
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result = (frame * (1 - intensity) + inverted * intensity).astype(np.uint8)
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else:
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result = inverted.astype(np.uint8)
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return result, state
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