1. A method of operation of a display system comprising: calculating an edge pixel image from a source image; generating a line histogram from the edge pixel image by applying a transform; calculating a candidate line from the line histogram meeting or exceeding a line category threshold for a horizontal line category, a vertical line category, a diagonal line category, or a combination thereof; calculating a vanishing point on the candidate line; and generating a depth map for the vanishing point for displaying the source image on a first device.