Dynamic edge enhancement in video

A method for dynamic edge enhancement comprising:

• generating a light background signal by measuring an ambient light falling on a display with a light sensor;
• generating a histogram of gray shade values in a plurality of frames of an input video signal received at a circuit;
• generating a gray shade transfer table based on the histogram;
• generating an edge mask strength value with a microcontroller in response to the gray shade transfer table, the light background signal, a night luminance threshold value, and a day luminance threshold value;
• detecting a plurality of edges in the input video signal;
• enhancing the plurality of edges in the input video signal in response to the gray shade transfer table and the edge mask strength value;
• and
• generating an output video signal suitable to drive the display after the enhancement of the plurality of edges.

A vehicle comprising:

• a display;
• a light sensor operational to generate a light background signal by measuring an ambient light falling on the display;
• and
• an electronic control unit operational to:
• generate a histogram of gray shade values in a plurality of frames of an input video signal received by the electronic control unit;
• generate a gray shade transfer table based on the histogram;
• generate an edge mask strength value in response to the gray shade transfer table, the light background signal, a night luminance threshold value, and a day luminance threshold value;
• detect a plurality of edges in the input video signal;
• enhance the plurality of edges in response to the gray shade transfer table and the edge mask strength value;
• and
• generate an output video signal used to drive the display after the enhancement of the plurality of edges.