%P 663-678 %C Szeged %O Bibliogr.: p. 676-678. ; ĂśsszefoglalĂĄs angol nyelven %T Pixel grouping of digital images for reversible data hiding %J Acta cybernetica %A Hasib Sultan Abdul %A Nyeem Hussain Md Abu %N 4 %D 2020 %I University of Szeged, Institute of Informatics %L acta71762 %K Kibernetika %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 1Ă3 has so far been considered. In this paper, we formulate PG kernels of sizes 3Ă1, 2Ă3 and 3Ă2 and investigate their effect on the rate-distortion performance of a prominent PG-based RDH scheme. Specially, a kernel of size 3Ă2 (or 2Ă3) 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.