Method and apparatus for attenuating image noise
AssigneeSamsung Electronics Co., Ltd.
InventorPil-ho Yu
Life of this patent
Estimating the term…
Abstract
A method of attenuating noise contained in an image signal according to the extent of the movement of the image signal based on the amount of noise, and an apparatus therefor are provided. This method includes measuring the amount of noise in an image signal by accumulating an offset between an input image signal and a delayed output image signal for a predetermined time, detecting the extent of the movement of the input signal based on the amount of noise measured, and forming an output image by controlling the specific weight of the input image signal and the delayed output image signal according to the detected movement.
Claims9
A method of attenuating noise in an image signal, the method comprising:
- measuring an amount of noise in an image signal by accumulating an offset between the input image signal and a delayed output image signal for a first predetermined time;
- detecting the extent of movement of the input signal based on the amount of noise measured;
- and
- forming an output image by controlling the specific weight of the input image signal and the delayed output image signal according to the detected movement.
An apparatus for attenuating noise in an input image signal, the apparatus comprising:
- a filter for filtering a delayed input image signal that is delayed for a predetermined time;
- a subtracter for generating a first offset signal between the filtered delayed input image signal and the input image signal;
- a movement detector for accumulating the first offset signal generated by the subtracter, and for detecting an extent of movement of the input image signal based on the accumulated value;
- a first multiplier for multiplying a signal output from the subtracter and the extent of the movement detected by the movement detector;
- and
- an adder for forming an output image signal by adding the signal output from the multiplier and the signal output from the filter.
Dependencies are inferred from the claim text.