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Method and device for correcting image askew

A technology for objects in images, applied in the field of preprocessing equipment, can solve problems such as object skew

Inactive Publication Date: 2004-08-11
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the image was taken by a camera, objects in the image may be skewed

Method used

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  • Method and device for correcting image askew
  • Method and device for correcting image askew
  • Method and device for correcting image askew

Examples

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Embodiment Construction

[0028] In the following description, details such as the size of an image and the size of a character block and a background block are described in detail as examples. It is obvious to those skilled in the art that the present invention can be implemented without these examples or by modifying the examples.

[0029] In the embodiment of the present invention, it is assumed that the size of the input image is 640×480 pixels. The term "block" refers to a character block and a background block, and here, it is assumed that each block has a size of 8×8 pixels. In addition, the term "grouping block" refers to the peripheral blocks of the binarized central block, and it is assumed here that the size of each peripheral block is 24×24 pixels.

[0030] In addition, the term "character string" used here refers to a character string composed of delimited characters, and the term "stripe" refers to a plurality of characters densely arranged at certain intervals, which form stripes. In t...

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Abstract

Disclosed is a device for correcting a skew of an object in an image. The device comprises an input part for receiving an image; a binarization part for binarizing pixels of the image into pixels having brightness values for character pixels and background pixels; a candidate stripe generation part for generating candidate stripes by performing dilation on character regions of the binarized image; a stripe classification part for classifying candidate stripes having predetermined eccentricity and blob size or above among the candidate stripes, as valid stripes; a skew angle decision part for calculating direction angles of the classified stripes, and deciding a direction angle having the largest count value as a skew angle; and a skew correction part for correcting a skew of an image by rotating the mage by the skew angle.

Description

technical field [0001] The present invention generally relates to a preprocessing device and method for recognizing image characters, and more particularly to a device and method for correcting object skew in an input image before recognizing characters in the image. Background technique [0002] Typically, preprocessing operations are performed to recognize glyphs. The "pre-processing operations" refer to operations performed on the image prior to recognizing characters in the image. Image preprocessing operations may include operations for determining whether an input image is suitable for character recognition, operations for correcting object skew in the input image, operations for appropriately correcting the size of the input image, and binarizing an image signal (ie, converting the image function into a binary image) so that the characteristics of the image signal can be identified. [0003] Devices for recognizing characters in images typically recognize characters...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06V30/10
CPCG06K9/3283G06V30/1478G06V30/10G06T5/00
Inventor 林采焕金南哲张益熏朴埈孝
Owner SAMSUNG ELECTRONICS CO LTD
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