Method and apparatus for deblurring an image with perspective distortion

A deblurring, image technology, applied in image enhancement, image analysis, image data processing and other directions to achieve good deblurring effect

Active Publication Date: 2016-05-11
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with digital cameras, it is difficult to obtain two images with different lens distances that can be predetermined

Method used

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  • Method and apparatus for deblurring an image with perspective distortion
  • Method and apparatus for deblurring an image with perspective distortion
  • Method and apparatus for deblurring an image with perspective distortion

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Embodiment Construction

[0040] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the following description is merely explanatory and exemplary in nature and is in no way intended to limit the invention and its application or uses. Relative arrangements of components and steps, numerical expressions, and numerical values ​​set forth in the embodiments do not limit the scope of the present invention unless otherwise specifically stated. Additionally, techniques, methods and devices known to those skilled in the art may not be discussed in detail, but are intended to be part of the description where appropriate.

[0041] Incidentally, in this specification, dimensions (such as length, height, width, etc.) are generally expressed in units of “pixels”.

[0042] First, refer to figure 1 An exemplary hardware configuration of a computing device 1000 that can implement deblurring according to the present inv...

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Abstract

The invention discloses a method and device for deblurring an image having perspective distortion. The method comprises a perspective information detection step for detecting perspective information of the image, a subregion segmentation step for segmenting the image into a plurality of subregions on the basis of the perspective information and enabling the blurring degree of every subregion to be identical and a deblurring step for deblurring every subregion on the basis of blurring information of every subregion. Compared with the prior art, the method and device can improve the deblurring effect of the image having perspective distortion.

Description

technical field [0001] The present invention relates to methods and devices for deblurring images with perspective distortion. Background technique [0002] Images may be taken with a digital camera for recording and extracting text information, and the extracted text information may be recognized by an Optical Character Recognition (OCR) module for other processing such as retrieval. However, if the surface of the target document is out of focus, the resulting image will be blurred, and this degraded image quality will affect the accuracy of recognition of text information. [0003] Also, when the photographing direction is not perpendicular to the surface of the target document, perspective distortion often occurs in the photographed image. If an image has perspective distortion, this means that the distance from the surface of different parts of the image to the lens of the digital camera is different, and therefore different parts of the image are blurred differently. ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06T5/00G06T7/00
Inventor李建杰李献罗兆海
OwnerCANON KK