Method of exposure compensation

• US 20070110427A1
• Filed: 11/16/2006
• Published: 05/17/2007
• Est. Priority Date: 11/17/2005
• Status: Abandoned Application

• Current Assignee: BenQ Corporation (Qisda Corporation)
• Original Assignee: BenQ Corporation (Qisda Corporation)
• Inventors: Tsai, Hung-Chi
• Application Number:
  US11/560,815
• Publication Number:
  US 20070110427A1
• Time in Patent Office: Days
• US Class Current: 396/166
• CPC Class Codes: G03B 9/70 with flash-synchronising contacts

Abstract

A method of exposure compensation comprises capturing a first image without a flash, capturing a second image with the flash, generating a F-number, a shutter speed value, and a flash value according to brightness distribution of the first and second images, and capturing a third image according to the F-number, the shutter speed value, and the flash value.

Claims

1. A method of exposure compensation comprising:

(a) capturing a first image without a flash;

(b) capturing a second image with a flash;

(c) generating a F-number, a shutter speed value, and a flash value according to a brightness distribution of the first image and a brightness distribution of the second image;

(d) capturing a third image according to the F-number, the shutter speed value, and the flash value.

2. The method of claim 1, further comprising generating a flash contributing value and a foreground area and a background area of a subject environment according to the brightness distributions of the first and second images, wherein the F-number and the shutter speed value are generated according to an average brightness of the background area.

3. The method of claim 2, wherein the flash value is generated according to an average brightness of the foreground area, the F-number, the shutter speed value and the flash contributing value.

4. The method of claim 1, wherein the F-number and the shutter speed value are the same in the step (a) and step (b).

5. The method of claim 1, wherein the method is utilizing a digital camera during image capture.

6. The method of claim 1, wherein step (a) to the step (d) are executed in a predetermined period.