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Apparatus and method for restoring image

A technology for recovering images and equipment. It is used in image communication, parts of color TVs, parts of TV systems, etc., and can solve problems such as errors and inability to estimate PSF.

Active Publication Date: 2009-03-18
SAMSUNG ELECTRONICS CO LTD +1
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AI Technical Summary

Problems solved by technology

[0009] However, the above blur estimation methods can lead to errors, especially when the input image has a complex shape
Furthermore, even if the above blur estimation method is able to determine the relative difference between the blur levels of the channels, the above blur estimation method may not be able to estimate the PSF corresponding to the blur level at a certain distance

Method used

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  • Apparatus and method for restoring image
  • Apparatus and method for restoring image
  • Apparatus and method for restoring image

Examples

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Effect test

example 1

[0041] - 1 - 1 - 1 - 1 8 - 1 - 1 - 1 - 1

example 2

[0042] 0 - 1 0 - 1 4 - 1 0 - 1 0

[0043] An R-channel edge intensity, a G-channel edge intensity, and a B-channel edge intensity may be detected from the input image 121 using a two-dimensional (2D) filter. Sobel filters can be used as 2D filters. The Sobel filter can be represented by Equation (2).

[0044] Equation (2):

[0045] Sobel filter: X direction - 1 0 ...

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Abstract

An apparatus and a method for restoring an image are provided. The apparatus includes an edge-strength-detection module which detects an R-channel edge strength, a G-channel edge strength and a B-channel edge strength from an input image and generates an R-channel edge map, a G-channel edge map and a B-channel edge map based on the R-channel edge strength, the G-channel edge strength and the B-channel edge strength; an edge-strength-compensation module which compensates for the R-channel edge strength and the B-channel edge strength based on the G-channel edge strength; a valid-value-generation module which generates a valid value indicating a blur level based on the compensated R-channel edge strength and the compensated B-channel edge strength; a point spread function (PSF) estimation module which estimates a PSF corresponding to the valid value; and an image-restoration module which restores the input image using the PSF.

Description

technical field [0001] One or more embodiments of the present invention relate to an image processing technique, and more specifically, to a device and method for restoring an image, wherein, based on the red (R) channel edge intensity of the input image, the green (G) channel Edge Intensity and Blue (B) Channel Edge Intensity calculates the effective value corresponding to the distance between the object of the input image and the image sensor, and based on the effective value, determines the clearest channel among the R, G, and B channels and the channel corresponding to the R, G, and B channels. Point spread function (PSF) of the channel identified as the sharpest of the G and B channels. Background technique [0002] Focus degradation caused by imprecise adjustment of the focal length is one of the main reasons for deteriorating the picture quality obtained by the image capturing device. In order to prevent such focus deterioration, image capture devices equipped with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/58H04N5/232
CPCH04N5/142H04N5/208
Inventor 林宰均姜周泳玉贤旭李性德
Owner SAMSUNG ELECTRONICS CO LTD
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