estimate_sl_al_zcestimate_sl_al_zcEstimateSlAlZcEstimateSlAlZcestimate_sl_al_zc (算子名称)
名称
estimate_sl_al_zcestimate_sl_al_zcEstimateSlAlZcEstimateSlAlZcestimate_sl_al_zc — Estimate the slant of a light source and the albedo of a surface.
参数签名
def estimate_sl_al_zc(image: HObject) -> Tuple[Sequence[float], Sequence[float]]
def estimate_sl_al_zc_s(image: HObject) -> Tuple[float, float]
描述
estimate_sl_al_zcestimate_sl_al_zcEstimateSlAlZcEstimateSlAlZcEstimateSlAlZcestimate_sl_al_zc estimates the SlantSlantSlantSlantslantslant 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
ImageImageImageImageimageimage, i.e. the percentage of light reflected by the
surface, using the algorithm of Zheng and Chellappa.
注意
The AlbedoAlbedoAlbedoAlbedoalbedoalbedo is assumed constant for the entire surface
depicted in the image.
运行信息
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
参数表
ImageImageImageImageimageimage (input_object) singlechannelimage(-array) → objectHImageHObjectHImageHobject (byte)
Image for which slant and albedo are to be estimated.
SlantSlantSlantSlantslantslant (output_control) angle.deg(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Angle of the light sources and the positive z-axis
(in degrees).
AlbedoAlbedoAlbedoAlbedoalbedoalbedo (output_control) real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Amount of light reflected by the surface.
结果
estimate_sl_al_zcestimate_sl_al_zcEstimateSlAlZcEstimateSlAlZcEstimateSlAlZcestimate_sl_al_zc always returns the value 2 (
H_MSG_TRUE)
.
可能的后置算子
sfs_mod_lrsfs_mod_lrSfsModLrSfsModLrSfsModLrsfs_mod_lr,
sfs_orig_lrsfs_orig_lrSfsOrigLrSfsOrigLrSfsOrigLrsfs_orig_lr,
sfs_pentlandsfs_pentlandSfsPentlandSfsPentlandSfsPentlandsfs_pentland,
photometric_stereophotometric_stereoPhotometricStereoPhotometricStereoPhotometricStereophotometric_stereo,
shade_height_fieldshade_height_fieldShadeHeightFieldShadeHeightFieldShadeHeightFieldshade_height_field
模块
3D Metrology