Mr. Paknahad is Research Engineer at IRIB R & D. He received B.S. and M.S. degrees in Electronics and Communications. In 2009, he joined IRIB and established his career as an audio and video engineer. Since 2016, he has been in charge of research and development of HDR, Tonemapping, UHDTV, secret sharing, data hiding, visual cryptography, and image processing tools.