## Abstract

Equations (12) and (13) in a previous Letter [Opt. Lett. 37, 2778 (2012)] were incorrect due to a mistake in writing and are modified here.

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The authors of  would like to point out that they made a mistake in writing Eqs. (12) and (13) on page 2779 in ; however, the implementation of the proposed algorithm in  is correct. Equations (12) and (13) should have read as follows:

$ht(n+1)(x)=h(n)(x){o(n)(−x)*[i(x)h(n)(x)*o(n)(x)]},h(n+1)(x)=ht(n+1)(x)∑xht(n+1)(x),$
$o(n+1)(x)=o(n)(x){h(n+1)(−x)*[i(x)h(n+1)(x)*o(n)(x)]}×11−λ1+βD(x) div(∇o(n)(x)|∇o(n)(x)|).$

1. L. Yan, H. Fang, and S. Zhong, Opt. Lett. 37, 2778 (2012).

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### Cited By

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$h t ( n + 1 ) ( x ) = h ( n ) ( x ) { o ( n ) ( − x ) * [ i ( x ) h ( n ) ( x ) * o ( n ) ( x ) ] } , h ( n + 1 ) ( x ) = h t ( n + 1 ) ( x ) ∑ x h t ( n + 1 ) ( x ) ,$
$o ( n + 1 ) ( x ) = o ( n ) ( x ) { h ( n + 1 ) ( − x ) * [ i ( x ) h ( n + 1 ) ( x ) * o ( n ) ( x ) ] } × 1 1 − λ 1 + β D ( x ) div ( ∇ o ( n ) ( x ) | ∇ o ( n ) ( x ) | ) .$