1. A method of displaying a participant during a video conference against a blurred or otherwise unclear background, comprising: using an imaging device including an optic, an image sensor and a processor; determining different distances of two or more objects in a scene being captured in video, including determining a sharpest of two or more color channels and calculating distances based on the determining of the sharpest of the two or more color channels; identifying at least one of the objects as a foreground object or a background object, or one or more of each, based on the determining of the different distances; applying an auto-focus to at least one foreground object over multiple images of the video; increasing a depth of field (DOF) including extending a delimit range of defocus distance over which a mean transfer function (MTF) is greater than 0.15 without decreasing aperture while maintaining a focus on said at least one foreground object at approximately said determined distance; and blurring or otherwise rendering unclear at least one background object or one or more portions of the scene other than the at least one foreground object, or combinations thereof, also based on the determining of distances.