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Correction to: Multimed Tools Appl (2017) 76:1201–1216
The Eqs. 3 and 15 in the original version of this article contained an error. The correct equations are presented below:
$$ {I}_{0^{{}^{\circ}}}^{\prime}\left({\mathbb{R}}_0\right)=I\left({\mathbb{R}}_0\right)-I\left({\mathbb{R}}_1\right) $$
(3)
$$ C\left({I}_{\theta}^{n-1}\left({\mathbb{R}}_0\right),{I}_{\alpha}^{n-1}\left({\mathbb{R}}_0\right)\right)=\left\{\begin{array}{c}1,\kern1.5em if\ {I}_{\theta}^{n-1}\left({\mathbb{R}}_0\right)>{I}_{\alpha}^{n-1}\left({\mathbb{R}}_0\right)\\ {}0,\kern1.75em else\kern9.5em \end{array}\ \right.\kern2.75em $$
(15)
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The online version of the original article can be found at https://doi.org/10.1007/s11042-015-3111-6.
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Chakraborty, S., Singh, S.K. & Chakraborty, P. Correction to: Local directional gradient pattern: a local descriptor for face recognition. Multimed Tools Appl 77, 20269 (2018). https://doi.org/10.1007/s11042-018-5612-6
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DOI: https://doi.org/10.1007/s11042-018-5612-6