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Methods of modeling an integrated noise in an image sensor and methods of reducing noise using the same

An image sensor and noise model technology, applied in the field of image sensors, can solve problems such as insufficient reflection, insufficient development, and image quality degradation

Inactive Publication Date: 2011-05-11
SAMSUNG ELECTRONICS CO LTD +1
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  • Claims
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AI Technical Summary

Problems solved by technology

The captured image includes noise depending on its intensity, conventional techniques employing the AWGN assumption are limited to removing noise from the captured image
Other traditional techniques based on noise modeling are underdeveloped, so that noise modeling only considers shot noise
As such, conventional techniques do not adequately reflect various noise types, so even after the captured image has been processed to remove noise, image quality still degrades

Method used

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  • Methods of modeling an integrated noise in an image sensor and methods of reducing noise using the same
  • Methods of modeling an integrated noise in an image sensor and methods of reducing noise using the same
  • Methods of modeling an integrated noise in an image sensor and methods of reducing noise using the same

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Embodiment Construction

[0042] Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, the inventive concepts of the present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the inventive concept to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals refer to like parts throughout.

[0043]It will be understood that, although the terms first, second, third etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Accordingly, a first element discussed b...

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Abstract

A method is for processing a Bayer domain signal of an image sensor to model an integrated noise in the image sensor. The method includes receiving the Bayer domain signal of the image signal, setting a plurality of noise models using the Bayer domain signal, and determining an integrated noise level in the image sensor based on the plurality of noise models. The noise models include a dark-current noise model, a shot noise model and a fixed-pattern noise model.

Description

[0001] This application claims priority from Korean Patent Application No. 10-2009-0105681 filed in the Korean Intellectual Property Office on November 3, 2009, the entire disclosure of which is hereby incorporated by reference. technical field [0002] Exemplary embodiments relate to an image sensor, and more particularly, to a method of modeling integrated noise in an image sensor and a method of reducing noise in an image sensor using integrated noise modeling. Background technique [0003] Images captured by image sensors include various types of noise, and as image sensors are manufactured with higher integration to reduce the size of portable devices (eg, digital cameras, camera phones, etc.), the adverse effects of noise increase. As a result, techniques for reducing image sensor noise have become more important for device miniaturization. [0004] In most conventional technologies, the noise generated in the image sensor is assumed to be additive white Gaussian noise...

Claims

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Application Information

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IPC IPC(8): H04N5/357H04N5/335
CPCH04N25/67H04N25/63H04N5/21H04N23/81
Inventor 金亨骏金会律李珍彦白烈慜
Owner SAMSUNG ELECTRONICS CO LTD
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