brain_deer.presentation.colormap_registry¶

Preset and user-defined colormaps (persisted via QSettings).

Functions¶

`get_colormap_lut`(→ numpy.ndarray \| None)	Return extended RGBA LUT for pyqtgraph (index 0 = transparent for masked -inf).
`scalar_values_to_rgba`(→ numpy.ndarray)	Colorize a 1D scalar array with the same LUT indexing as `scalar_slice_to_rgba()`.
`scalar_slice_to_rgba`(→ numpy.ndarray)	Colorize a scalar slice with the same indexing as pyqtgraph `makeARGB` + extended LUT.
`apply_colormap_rgba`(→ numpy.ndarray)	Map normalized [0,1] scalar image to RGBA float32 (alpha=1).
`populate_vtk_color_transfer_function`(→ None)	Fill a vtkColorTransferFunction from registry (presets + custom).
`build_vtk_image_lut`(name, *[, n, scalar_min, ...])	VTK LUT matching pyqtgraph `get_colormap_lut` (for surface / volume actors).
`build_vtk_lookup_table`(name, *[, n, scalar_min, ...])	Build vtkLookupTable for scalar mappers (surface / legacy actors).

Module Contents¶

brain_deer.presentation.colormap_registry.get_colormap_lut(name: str) → numpy.ndarray | None¶: Return extended RGBA LUT for pyqtgraph (index 0 = transparent for masked -inf).

brain_deer.presentation.colormap_registry.scalar_values_to_rgba(values: numpy.ndarray, colormap: str, lo: float, hi: float, *, opacity: float = 1.0) → numpy.ndarray¶: Colorize a 1D scalar array with the same LUT indexing as scalar_slice_to_rgba().

brain_deer.presentation.colormap_registry.scalar_slice_to_rgba(slice_data: numpy.ndarray, colormap: str, lo: float, hi: float, *, opacity: float = 1.0) → numpy.ndarray¶: Colorize a scalar slice with the same indexing as pyqtgraph makeARGB + extended LUT.

brain_deer.presentation.colormap_registry.apply_colormap_rgba(normalized_data: numpy.ndarray, name: str) → numpy.ndarray¶: Map normalized [0,1] scalar image to RGBA float32 (alpha=1).

brain_deer.presentation.colormap_registry.populate_vtk_color_transfer_function(ctf, name: str, lo: float, hi: float) → None¶: Fill a vtkColorTransferFunction from registry (presets + custom).

brain_deer.presentation.colormap_registry.build_vtk_image_lut(name: str, *, n: int = 256, scalar_min: float = 0.0, scalar_max: float = 1.0, below_range_transparent: bool = True)¶: VTK LUT matching pyqtgraph get_colormap_lut (for surface / volume actors).

brain_deer.presentation.colormap_registry.build_vtk_lookup_table(name: str, *, n: int = 256, scalar_min: float = 0.0, scalar_max: float = 1.0)¶: Build vtkLookupTable for scalar mappers (surface / legacy actors).