System and Method for Providing Uniform Brightness in Seam Portions of Tiled Images

• US 20090273540A1
• Filed: 12/18/2006
• Published: 11/05/2009
• Est. Priority Date: 12/16/2005
• Status: Abandoned Application

• Current Assignee: Mark Alan Schultz
• Original Assignee: Mark Alan Schultz
• Inventors: Schultz, Mark Alan
• Application Number:
  US12/086,574
• Publication Number:
  US 20090273540A1
• Time in Patent Office: Days
• US Class Current: 345/1.300
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026

Abstract

The present invention provides method for producing a substantially seamless video image on a display surface. The method comprises the steps of separately projecting at least a first and a second video image onto a display surface such that a seam is defined by overlapping portions of said first and second video images. Inside the seam, the brightness of video image is adjusted by adjusting pixels of said overlapping portions in accordance with a modulus determined by the number of overlapping portions defining the seam.

Claims

1. A projector system for displaying images on a display screen the system comprising:

An image separator coupled to receive an input video signal representing an image to be displayed and to provide separate output video signals corresponding to portions of said image to projected on said screen;

Said image separator adjusting pixel values of overlapping image portions in accordance with a modulus (n) of said values where n=the number of projectors comprising said system.

2. A method for improving dynamic range in seams of tiled image projected onto a display screen comprising steps of:

separating an input image into at least two image portions, each of said image portions including at least one image area comprising pixels corresponding to pixels of the other image portion;

for each of said corresponding pixels dividing pixel brightness value by the number of corresponding pixels to obtain a divided brightness value;

for each of said corresponding pixel brightness values determining a modulus n of said value wherein n=the number image portions;

adjusting brightness values of said corresponding pixels based upon said modulus.