Method for dominant color setting of video region and data structure and method of confidence measure extraction

• US 20050093880A1
• Filed: 11/22/2004
• Published: 05/05/2005
• Est. Priority Date: 07/03/1999
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Hyeon Jun
• Granted Patent: US 7,453,467 B2
• Time in Patent Office: Days
• US Class Current: 345/589
• CPC Class Codes: G06F 16/785 using colour or luminescence
• CPC Class Codes: G06V 10/56 relating to colour
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing

Abstract

A method for a dominant color setting of a video region and a data structure and a method of a confidence measure extraction are disclosed. The video region dominant color setting method is characterized in that a region dominant color descriptor is expressed by the number of dominant colors with respect to a certain region, a dominant color expressed, a frequency that the dominant color appears, and an accuracy of a color value representing the region in a region dominant color based on various region dominant color extraction methods, for thereby expressing a region dominant color using a plurality of colors with respect to a region dominant color value and a confidence value of a region dominant color information based on various region dominant color feature extracting methods.

Claims

1. A method of describing a coherency value for at least one dominant color in a region of an image, comprising:

describing a weighted sum of coherencies for each dominant color, wherein the weight is proportional to a number of pixels corresponding to each dominant color of the region.

2. A coherency value extraction method of at least one region dominant color in a region of an image, comprising:

obtaining a number of pixels and a coherency corresponding to each region dominant color of the region, respectively;

multiplying the number of pixels by the coherency corresponding to each region dominant color of the region; and

summing all the multiplied values and extracting a coherency value for at least one dominant color in the region.

3. The method of claim 2, further comprising:

dividing the summed value by a region size before extracting a coherency value for at least one dominant color in the region.

4. A coherency extraction method of a dominant color, comprising:

inputting a size of coherency checking mask having a width and a height;

obtaining a number of pixels mapped to and corresponding to the dominant color;

obtaining a number of coherent pixels by counting a number of pixels mapped to the coherency checking mask when the pixels masked by central arrangement of the coherency checking mask is mapped to the dominant color; and

dividing the total number of coherent pixels by a value obtained by multiplying the number of pixels mapped to and corresponding to the dominant color by a value obtained by subtracting 1 from the size of coherency checking mask.