1. A method for enhancing the visual perception of augmented reality presentation, the method comprising the procedures of: detecting the location of a user, with a location measurement unit; detecting the line-of-sight (LOS) of said user, with a line-of-sight detector; predicting a future background environment to be viewed by said user through a see-through head-mounted display (HMD), based on at least the detected location and the detected LOS; predicting at least one color-attribute of said future background environment at a background location corresponding to a LOS of said user; comparing the predicted color-attribute of said future background environment at said background location with at least one color-attribute of an intended foreground supplementary image of a symbol, a text, or graphic or visual imagery, to be projected on said HMD overlaid onto the view of said future background environment at said background location; and when an incompatibility condition is detected between said predicted color-attribute of said future background environment and said color-attribute of said intended foreground supplementary image, adjusting at least one visual parameter of said supplementary image in a manner that minimizes said incompatibility condition, and projecting said supplementary image with the adjusted visual parameter on said HMD at said background location.