HALCON 17.12 / HALCON Operator Reference / 3D Reconstruction / Photometric Stereo
ClassesClasses | | Operators

estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLr (Operator)

Name

estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLr — Estimate the slant of a light source and the albedo of a surface.

Signature

estimate_sl_al_lr(Image : : : Slant, Albedo)

Herror estimate_sl_al_lr(const Hobject Image, double* Slant, double* Albedo)

Herror T_estimate_sl_al_lr(const Hobject Image, Htuple* Slant, Htuple* Albedo)

void EstimateSlAlLr(const HObject& Image, HTuple* Slant, HTuple* Albedo)

HTuple HImage::EstimateSlAlLr(HTuple* Albedo) const

double HImage::EstimateSlAlLr(double* Albedo) const

static void HOperatorSet.EstimateSlAlLr(HObject image, out HTuple slant, out HTuple albedo)

HTuple HImage.EstimateSlAlLr(out HTuple albedo)

double HImage.EstimateSlAlLr(out double albedo)

Description

estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrEstimateSlAlLr 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

Parameters

ImageImageImageImageimage (input_object)  singlechannelimage(-array) → objectHImageHImageHobject (byte)

Image for which slant and albedo are to be estimated.

SlantSlantSlantSlantslant (output_control)  angle.deg(-array) → HTupleHTupleHtuple (real) (double) (double) (double)

Angle between the light sources and the positive z-axis (in degrees).

AlbedoAlbedoAlbedoAlbedoalbedo (output_control)  real(-array) → HTupleHTupleHtuple (real) (double) (double) (double)

Amount of light reflected by the surface.

Result

estimate_sl_al_lrestimate_sl_al_lrEstimateSlAlLrEstimateSlAlLrEstimateSlAlLr always returns the value 2 (H_MSG_TRUE).

Possible Successors

sfs_mod_lrsfs_mod_lrSfsModLrSfsModLrSfsModLr, sfs_orig_lrsfs_orig_lrSfsOrigLrSfsOrigLrSfsOrigLr, sfs_pentlandsfs_pentlandSfsPentlandSfsPentlandSfsPentland, photometric_stereophotometric_stereoPhotometricStereoPhotometricStereoPhotometricStereo, shade_height_fieldshade_height_fieldShadeHeightFieldShadeHeightFieldShadeHeightField

Module

3D Metrology

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HALCON Operator Reference 17.12 Copyright © 1996-2017 MVTec Software GmbH