1. A method of calibrating a projector in an autostereoscopic display, said method comprising: using a projector to project an image, comprising a plurality of objects, via a spatial-resolution-to-angular-resolution-converter; receiving said image using a camera disposed at a viewer side of said spatial-resolution-to-angular-resolution-converter, wherein said camera is disposed on an opposite side of said spatial-resolution-to-angular-resolution-converter than said projector; generating a command to cause said camera to obtain said image from a different position relative to said spatial-resolution-to-angular-resolution-converter, such that said image is usable for calibration, wherein said different position is to provide a different apparent relative alignment of said plurality of objects as viewed from said different position; determining that a first object of said plurality of objects is not correctly aligned with a second object of said plurality of objects; and re-aligning said first object relative to said second object by generating a command causing said projector to shift the projection of said image relative to said spatial-resolution-to-angular-resolution-converter.