Method and apparatus for estimating noise determination criteria in an image sensor
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-jin Yoo, Seong-deok Lee
Life of this patent
Estimating the term…
Abstract
A method and an apparatus are provided for estimating noise determination criteria in an image sensor. The method includes calculating a color characteristic value for each of a plurality blocks constituting an input image, comparing the color characteristic value of a first block among the blocks with a initial noise criterion, sorting the color characteristic value of the first block as a first group of a color characteristic class and accumulating a result of the comparing into the first group, and modifying the initial noise criterion using a result of the accumulating and calculating a first group noise criterion to be applied to corresponding blocks belonging to the sorted first group of the color characteristic class.
Claims18
A method for estimating noise determination criteria in an image sensor, the method comprising:
- calculating a color characteristic value for each of a plurality blocks of an input image;
- comparing a color characteristic value of a first block among the plurality of blocks with an initial noise criterion;
- sorting the color characteristic value of the first block as a first group of a color characteristic class and accumulating a result of the comparing into the first group;
- and
- modifying the initial noise criterion based on a result of the accumulating and calculating a first group noise criterion to be applied to corresponding blocks belonging to the sorted first group of the color characteristic class.
An image device comprising:
- a block characteristics calculator which calculates a color characteristic value for each of a plurality of blocks of an input image;
- a sorted information accumulator which compares the color characteristic value of a first block among the plurality of blocks with an initial noise criterion, sorts the color characteristic value of the first block as a first group of a color characteristic class, and accumulates a result of the comparison into the first group;
- and
- a noise criterion modifier which modifies the initial noise criterion using the result of the accumulation and calculates a first group noise criterion to be applied to corresponding blocks belonging to the sorted first group of the color characteristic class.
Dependencies are inferred from the claim text.