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Method of and apparatus for estimating noise of input image, and method and recording media of eliminating noise

A noise and noise estimation technology, applied in the field of estimating noise, can solve problems such as difficulty in estimating noise

Inactive Publication Date: 2005-12-28
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

[0018] However, conventional intra-frame noise estimation devices have difficulty estimating noise in input images with less smooth regions, i.e., input images with complex tissues

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  • Method of and apparatus for estimating noise of input image, and method and recording media of eliminating noise
  • Method of and apparatus for estimating noise of input image, and method and recording media of eliminating noise
  • Method of and apparatus for estimating noise of input image, and method and recording media of eliminating noise

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Embodiment Construction

[0036] Below, will refer to image 3 , Figure 4A and 4B A method of estimating noise according to the present invention is described.

[0037] image 3 is a block diagram of an apparatus for estimating noise according to the present invention.

[0038] The apparatus for estimating noise includes: a motion estimation and compensation unit 310 , a comparison unit 320 , a variance calculation unit 330 , an addition unit 340 , and a noise estimation unit 350 . Optionally, the device for estimating noise may further include a threshold calculation unit 360 .

[0039] With respect to the block at position (i, j) in the current frame, the motion estimation and compensation unit 310 uses as Figure 4A and 4B Multi-resolution motion estimation is shown to detect the motion vector MV at the original resolution frame level L0 L0 and the motion vector MV on the low resolution frame level L1 L1 . In this embodiment, motion vector detection uses multi-resolution motion estimation,...

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Abstract

A method and apparatus for estimating noise based on motion compensation. The method includes: estimating a motion vector of a current block of a predetermined size of an input image; calculating a difference between a block corresponding to the estimated motion vector and the current block; comparing the calculated difference with a predetermined threshold; selectively updating a noise estimate of the noise estimate of the input image; and generating information about noise based on the selectively updated noise estimate.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2004-0044508 filed with the Korean Intellectual Property Office on June 16, 2004, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a kind of method and equipment for estimating noise, more particularly, relate to a kind of when the image distorted by noise is input to motion compensation (MC) based on such as Motion Picture Experts Group (MPEG)-2 and MPEG-4 ) and a discrete cosine transform (DCT) video encoder, a method and apparatus for estimating noise, and a method for effectively removing noise based on the estimated result. Background technique [0003] Recently, set-top boxes have been introduced that receive analog terrestrial broadcasts and encode them using compression techniques such as MPEG-2 or MPEG-4. However, the image input to the receiver is usually distorted by various types ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24G06K9/36G06K9/40H04N7/26
CPCH04N19/139H04N19/176H04N19/117H04N19/14H04N19/85H04N19/51
Inventor 宋秉哲
Owner SAMSUNG ELECTRONICS CO LTD
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