%0 Journal Article %@ 0324-721X %A Hasib Sultan Abdul %A Nyeem Hussain Md Abu %C Szeged %D 2020 %F acta:71762 %I University of Szeged, Institute of Informatics %J Acta cybernetica %K Kibernetika %N 4 %P 663-678 %T Pixel grouping of digital images for reversible data hiding %U http://acta.bibl.u-szeged.hu/71762/ %V 24 %X Pixel Grouping (PG) of digital images has been a key consideration in recent development of the Reversible Data Hiding (RDH) schemes. While a PG kernel with neighborhood pixels helps compute image groups for better embedding rate-distortion performance, only horizontal neighborhood pixel group of size 1×3 has so far been considered. In this paper, we formulate PG kernels of sizes 3×1, 2×3 and 3×2 and investigate their effect on the rate-distortion performance of a prominent PG-based RDH scheme. Specially, a kernel of size 3×2 (or 2×3) that creates a pair of pixel-trios having triangular shape and offers a greater possible correlation among the pixels. This kernel thus can be better utilized for improving a PG-based RDH scheme. Considering this, we develop and present an improved PG-based RDH scheme and the computational models of its key processes. Experimental results demonstrated that our proposed RDH scheme offers reasonably better embedding rate-distortion performance than the original scheme. %Z Bibliogr.: p. 676-678. ; összefoglalás angol nyelven