Method for adjusting exposure of camera device
AssigneeNational Chiao Tung University
InventorsJiun-In GUO, Po-Hsiang HUANG
Life of this patent
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Abstract
A method for adjusting exposure of a camera device is provided to include steps of: using first to Mth camera modules to continuously capture images in sync; reducing an exposure value of the first camera module according to a first current image captured at a latest time point by the first camera module until a first condition associated with the first current image is met; adjusting an exposure value of an ith camera module according to an ith current image, which is captured at the latest time point by the ith camera module, and an (i-1)th previous image, which is captured at a time point immediately previous to the latest time point by an (i-1)th camera module.
Claims20
A method for adjusting exposure of a camera device, said method comprising steps of:
- A) providing a camera device that includes first to Mth camera modules and a processing module coupled to the first to Mth camera modules, where M≧2;
- (B) by the first to Mth camera modules, continuously capturing images of a scene in sync, and providing the images thus captured to the processing module, each of the images being composed of a plurality of pixels, each of which has a pixel value;
- (C) by the processing module, reducing, upon receipt of a first current image captured at a latest time point by the first camera module, an exposure value of the first camera module according to the first current, image until a first condition associated with the first current image is met;
- (D) by the processing module, adjusting, upon receipt of an ith current image, an exposure value of the ith camera module according to the ith current image and an (i-1)th previous image, wherein the ith current image is captured at the latest time point by the ith camera module, and the (i-1)th previous image is captured at a time point immediately previous to the latest time point by the (i-1)th camera module, where 2≦i≦M;
- (E) repeating step (C) until the first condition associated with the first current image is met;
- and
- (F) repeating step (D) until a second condition associated with the ith current image and the (i-1)th previous image is met.
A camera device comprising:
- first to Mth camera modules configured to continuously capture images of a scene in sync, each of the images being composed of a plurality of pixels, each of which has a pixel value, where M≧2;
- and
- a processing module coupled to said first to Mth camera modules for receiving the images captured thereby, and configured
- to perform a first process of reducing, upon receipt of a first current image captured at a latest time point by said first camera module, an exposure value of said first camera module according to the first current image,
- to perform a second process of adjusting, upon receipt of an ith current image, an exposure value of said ith camera module according to the ith current image and an (i-1)th previous image,
- to repeat performing the first process until a first condition associated with the first current image is met, and
- to repeat performing the second process until a second condition associated with the ith current image and the (i-1)th previous image is met,
- wherein the ith current image is captured at the latest time point by said ith camera module, and the (i-1)th previous image is captured at a time point immediately previous to the latest time point by said (i-1)th camera module, where 2≦i≦M.
Dependencies are inferred from the claim text.