Incoherent　digital　holographic　adaptive　optics　(IDHAO)　is　a　new　technology　of　wavefront　sensing　and　correction.　However,　the　process　of　the　holographic　wavefront　sensing　needs　to　record　digital　holograms　of　object　and　a　guide　star　independently　which　reduces　the　speed　of　sensing.　We　present　a　method　for　enhancing　the　operation　speed　of　the　IDHAO　in　this　paper.　The　effects　of　the　size　of　guide　star　hologram　and　the　minimum　resolvable　size　of　discrete　object　on　compensation　of　wavefront　aberration　are　discussed.　We　find　that　for　a　discrete　object,　the　hologram　of　guide　star　can　be　extracted　from　the　hologram　of　the　incoherent　object.　The　operation　speed　of　IDHAO　system　can　be　enhanced　for　discrete　object　by　this　method.　This　study　improves　the　potential　applications　of　IDHAO　in　the　field　of　astronomical　observation　and　so　on.