estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr (Operator)
Name
estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr — Estimate the slant of a light source and the albedo of a surface.
Signature
def estimate_sl_al_lr(image: HObject) -> Tuple[Sequence[float], Sequence[float]]
def estimate_sl_al_lr_s(image: HObject) -> Tuple[float, float]
Description
estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr estimates the SlantSlantSlantslantslant of a
light source, i.e., the angle between the light source and the positive
z-axis, and the albedo of the surface in the input image
ImageImageImageimageimage, i.e. the percentage of light reflected by the
surface, using the algorithm of Lee and Rosenfeld.
Attention
The AlbedoAlbedoAlbedoalbedoalbedo is assumed constant for the entire surface
depicted in the image.
Execution Information
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
Parameters
ImageImageImageimageimage (input_object) singlechannelimage(-array) → objectHImageHObjectHObjectHobject (byte)
Image for which slant and albedo are to be estimated.
SlantSlantSlantslantslant (output_control) angle.deg(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Angle between the light sources and the positive z-axis
(in degrees).
AlbedoAlbedoAlbedoalbedoalbedo (output_control) real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Amount of light reflected by the surface.
Result
estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr always returns the value 2 (
H_MSG_TRUE)
.
Possible Successors
sfs_mod_lrsfs_mod_lrSfsModLrSfsModLrsfs_mod_lr,
sfs_orig_lrsfs_orig_lrSfsOrigLrSfsOrigLrsfs_orig_lr,
sfs_pentlandsfs_pentlandSfsPentlandSfsPentlandsfs_pentland,
photometric_stereophotometric_stereoPhotometricStereoPhotometricStereophotometric_stereo,
shade_height_fieldshade_height_fieldShadeHeightFieldShadeHeightFieldshade_height_field
Module
3D Metrology