Three-dimensional display system with depth map mechanism and method of operation thereof

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;
• selecting a line category threshold for a horizontal line category, a vertical line category, a diagonal line category, or a combination thereof;
• calculating a candidate line from the line histogram meeting or exceeding the line category threshold for the horizontal line category, the vertical line category, the 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.

A three-dimensional display system comprising:

• a first storage unit for storing a source image;
• an edge detection module, coupled to the first storage unit, for calculating an edge pixel image from the source image;
• a straight line search module, coupled to the edge detection module, for generating a line histogram from the edge pixel image using a transform;
• a line detection module, coupled to the straight line search module, for calculating a candidate line from the line histogram;
• a vanishing point calculation module, coupled to the line detection module, for calculating a vanishing point on the candidate line;
• and
• a depth generation module, coupled to the vanishing point calculation module, for generating a depth map from the vanishing point for displaying the source image on a first device.