1. A method for automatically detecting a behavior of an individual, the method comprising: capturing a sequence of images of a space at least occasionally inhabited by the individual with a mobile electronic device positioned at a height within a predetermined range of acceptable vertical heights and at an angular orientation within a predetermined range of acceptable angular orientations; optionally, pre-processing the captured sequence of images by a processor of a computing device prior to subsequent image processing; automatically identifying, by the processor of the computing device, graphical elements of the sequence of images corresponding to the individual moving within a field of view of the mobile electronic device; automatically determining, by the processor of the computing device, one or more spatial measurements from one or more images of the sequence of images, wherein the one or more spatial measurements comprises at least one member selected from the group consisting of: (i) a topmost pixel row; (ii) a row-width maximum; (iii) a row-width minimum; (iv) a corner brightness; (v) an overall brightness of an image excluding the movement mask; and (vi) a mask proportion or size; automatically determining, by the processor of the computing device, one or more body measurements (i) from the one or more determined spatial measurements and/or (ii) directly from two or more images of the sequence of images; automatically detecting, by the processor of the computing device, a behavior of the individual from the one or more determined body measurements and/or the one or more determined spatial measurements; and automatically initiating, by the processor of the computing device, an event upon detection of the behavior of the individual.