Method and system for noise estimation from video sequence
First Claim
1. A method for determining the noise level;
- as characterized by the standard deviation, of an input video sequence corrupted by unknown noise, said method comprising the steps of;
(a) spatiotemporally filtering the input video sequence, thereby producing a filtered video sequence;
(b) estimating a standard deviation from the difference between the input video sequence and the filtered video sequence, thereby producing an estimated standard deviation; and
(c) iterating through steps (a) and (b) using the estimated standard deviation previously obtained from step (b) to perform the filtering in step (a) until the value of the noise level approaches the unknown noise of the input video sequence, whereby the noise level is then characterized by a finally determined standard deviation.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for determining the noise level, as characterized by the standard deviation, of an input video sequence corrupted by unknown noise comprises the steps of: (a) spatiotemporally filtering the input video sequence, thereby producing a filtered video sequence; (b) estimating a standard deviation from the difference between the input video sequence and the filtered video sequence, thereby producing an estimated standard deviation; and (c) iterating through steps (a) and (b) using the estimated standard deviation previously obtained from step (b) to perform the filtering in step (a) until the value of the noise level approaches the unknown noise, whereby the noise level is then characterized by a finally determined standard deviation.
21 Citations
11 Claims
-
1. A method for determining the noise level;
- as characterized by the standard deviation, of an input video sequence corrupted by unknown noise, said method comprising the steps of;
(a) spatiotemporally filtering the input video sequence, thereby producing a filtered video sequence;
(b) estimating a standard deviation from the difference between the input video sequence and the filtered video sequence, thereby producing an estimated standard deviation; and
(c) iterating through steps (a) and (b) using the estimated standard deviation previously obtained from step (b) to perform the filtering in step (a) until the value of the noise level approaches the unknown noise of the input video sequence, whereby the noise level is then characterized by a finally determined standard deviation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- as characterized by the standard deviation, of an input video sequence corrupted by unknown noise, said method comprising the steps of;
-
10. System for determining the noise level, as characterized by the standard deviation, of an input video sequence corrupted by unknown noise, said system comprising:
-
a spatiotemporal filtering module for processing the input video sequence, thereby producing a filtered video sequence;
a noise estimation module for estimating a standard deviation from the difference between the input video sequence and the filtered video signal, thereby producing an estimated standard deviation; and
means interconnecting the filter and the noise estimation module for iterating through the modules using the estimated standard deviation previously obtained from the noise estimation module to perform the filtering in the spatiotemporal filtering module until the value of the noise level approaches the unknown noise, whereby the noise level is then characterized by a finally determined standard deviation. - View Dependent Claims (11)
-
Specification