Abstract
We discuss QBVS (Qualified Binocular Viewing Space) from where users can watch images without visual fatigue caused by stereoscopic displays and QSVS (Qualified Stereoscopic Viewing Space) from where users can watch qualified 3D image and their measurement methods in case of two-view autostereoscopic displays. By subjective experiment, it is confirmed that ghost images due to 3D crosstalk and Interocular Luminance Difference are important factors which determine those boundaries of QBVS and Q3DVS..