estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr (算子)
名称
estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr — （使用 Lee 和 Rosenfeld 算法）估计光源的倾斜度和表面的反射率。
签名
def estimate_sl_al_lr(image: HObject) -> Tuple[Sequence[float], Sequence[float]]
def estimate_sl_al_lr_s(image: HObject) -> Tuple[float, float]
描述
estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr 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 Lee and Rosenfeld.
注意
The AlbedoAlbedoAlbedoAlbedoalbedoalbedo is assumed constant for the entire surface
depicted in the image.
执行信息
- 多线程类型：可重入（与非独占算子并行运行）。
- 多线程作用域：全局（可从任何线程调用）。
- 在元组级别上自动并行化。
参数
ImageImageImageImageimageimage (输入对象) singlechannelimage(-array) → objectHImageHObjectHImageHobject (byte)
Image for which slant and albedo are to be estimated.
SlantSlantSlantSlantslantslant (输出控制) angle.deg(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Angle between the light sources and the positive z-axis
(in degrees).
AlbedoAlbedoAlbedoAlbedoalbedoalbedo (输出控制) real(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Amount of light reflected by the surface.
结果
estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrEstimateSlAlLrestimate_sl_al_lr 始终返回值 2 ( H_MSG_TRUE )。
可能的后继
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
三维计量