Image processing apparatus and control method thereof

An image processing apparatus comprising:

• a first image processing unit which converts an input image signal into a brightness signal and a chromaticity signal;
• and
• a second image processing unit which adjusts a bandwidth used to filter the chromaticity signal to correspond to a noise level of the image signal, and filters the chromaticity signal with the adjusted bandwidth to extract a chrominance signal,
• wherein the first image processing unit performs one of a two-dimensional comb filtering and a three-dimensional comb filtering depending on at least one of a motion amount of the input image signal and an amplitude of the noise level,
• wherein the second image processing unit performs chroma filtering, and
• wherein the second image processing unit increases the bandwidth if the amplitude of the noise level is less than a first setting value in a changing operation from the two-dimensional comb filtering to the three-dimensional comb filtering.

A control method for an image processing apparatus, the control method comprising:

• converting an input image signal into a brightness signal and a chromaticity signal;
• detecting a noise level of the input image signal by detecting an amplitude of the image signal during a predetermined period of the image signal in which image information is not included:
• adjusting a filtering bandwidth based on the detected noise level of the image signal;
• filtering the chromaticity signal with the adjusted bandwidth;
• and
• converting the chromaticity signal to a chrominance signal.

A control method for an image processing apparatus, the control method comprising:

• converting an input image signal into a brightness signal and a chromaticity signal;
• adjusting a filtering bandwidth to correspond to a noise level of the image signal;
• filtering the chromaticity signal with the adjusted bandwidth;
• and
• converting the chromaticity signal to a chrominance signal,
• wherein the converting the input image signal comprises:
• operating in one of a two-dimensional comb filtering and a three-dimensional comb filtering based on at least one of a motion amount of the input image signal and an amplitude of the noise level,
• wherein the filtering the chromaticity signal comprises chroma filtering, and
• wherein the adjusting comprises:
• increasing the bandwidth if the amplitude of the noise level is less than a first setting value in a changing operation from the two-dimensional comb filtering to the three-dimensional comb filtering.