61 lines
2.1 KiB
Python
61 lines
2.1 KiB
Python
"""Scan line reordering — fix meander, interlace, and deinterlace artifacts."""
|
|
|
|
from __future__ import annotations
|
|
|
|
import numpy as np
|
|
|
|
from backend.node_registry import register_node
|
|
from backend.data_types import DataField
|
|
|
|
|
|
@register_node(display_name="Scan Line Reorder")
|
|
class ScanLineReorder:
|
|
@classmethod
|
|
def INPUT_TYPES(cls):
|
|
return {
|
|
"required": {
|
|
"field": ("DATA_FIELD",),
|
|
"operation": (["reverse_odd", "reverse_even", "deinterlace_odd",
|
|
"deinterlace_even", "flip_vertical"], {"default": "reverse_odd"}),
|
|
}
|
|
}
|
|
|
|
OUTPUTS = (
|
|
('DATA_FIELD', 'result'),
|
|
)
|
|
FUNCTION = "process"
|
|
|
|
DESCRIPTION = (
|
|
"Fix scan line ordering artifacts. reverse_odd/even reverses alternate "
|
|
"rows to correct meander (serpentine) scanning. deinterlace selects only "
|
|
"odd or even rows and stretches to fill. flip_vertical reverses row order. "
|
|
)
|
|
|
|
KEYWORDS = ("meander", "serpentine", "interlace", "trace retrace", "reverse")
|
|
|
|
def process(self, field: DataField, operation: str) -> tuple:
|
|
data = np.asarray(field.data, dtype=np.float64).copy()
|
|
yres, xres = data.shape
|
|
|
|
if operation == "reverse_odd":
|
|
data[1::2, :] = data[1::2, ::-1]
|
|
elif operation == "reverse_even":
|
|
data[0::2, :] = data[0::2, ::-1]
|
|
elif operation == "deinterlace_odd":
|
|
odd_rows = data[1::2, :]
|
|
# Stretch back to original height via linear interpolation
|
|
from scipy.ndimage import zoom
|
|
scale_y = yres / odd_rows.shape[0]
|
|
data = zoom(odd_rows, (scale_y, 1.0), order=1)
|
|
elif operation == "deinterlace_even":
|
|
even_rows = data[0::2, :]
|
|
from scipy.ndimage import zoom
|
|
scale_y = yres / even_rows.shape[0]
|
|
data = zoom(even_rows, (scale_y, 1.0), order=1)
|
|
elif operation == "flip_vertical":
|
|
data = data[::-1, :].copy()
|
|
else:
|
|
raise ValueError(f"Unknown operation: {operation!r}")
|
|
|
|
return (field.replace(data=data),)
|