简介：Distortion-freedataembeddingisatechniquewhichcanassurethatnotonlythesecretdataiscorrectlyextractedbutalsothecovermediaisrecoveredwithoutanydistortionaftersecretdataisextractedcompletely.Becauseoftheseadvantages,thistechniqueattractstheattentionofmanyresearchers.Inthispaper,anewdistortion-freedataembeddingschemeforhighdynamicrange(HDR)imagesisproposed.BydependingonCartesianproduct,thisschemecanobtainhigherembeddingcapacitywhilemaintainingtheexactlyidenticalcoverimageandstegoimagewhenusingthetonemappingalgorithms.Inexperimentalresults,theproposedschemeissuperiortoYuetal.'sschemeinregardtotheembeddingrate?anaverageembeddingrateof0.1355bppcomparedwithYuetal.'sscheme(0.1270bpp).