JP2007102702A5 - - Google Patents

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JP2007102702A5
JP2007102702A5 JP2005295237A JP2005295237A JP2007102702A5 JP 2007102702 A5 JP2007102702 A5 JP 2007102702A5 JP 2005295237 A JP2005295237 A JP 2005295237A JP 2005295237 A JP2005295237 A JP 2005295237A JP 2007102702 A5 JP2007102702 A5 JP 2007102702A5
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Japan
Prior art keywords
image
character
inclination
character string
correction method
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JP2005295237A
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Japanese (ja)
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JP2007102702A (en
JP4696239B2 (en
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Publication of JP2007102702A5 publication Critical patent/JP2007102702A5/ja
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Claims (5)

入力された文字列画像に対して、所定のずらし角刻みで輪郭画像を形成し、
前記輪郭画像の画素に対して重みを付けて、垂直方向に投影して投影ヒストグラム画像を作成し、
前記投影ヒストグラム画像から最適な尾根成分を抽出し、
前記尾根成分から文字の傾斜角度と範囲を求め、対応するずらし角度の傾斜画像から直立した文字画像を取り出して、個々の文字単位で傾斜補正された文字画像列として配列させることを特徴とする文字列の傾斜補正方法。
For the input character string image, a contour image is formed with a predetermined angular offset,
Weighting the pixels of the contour image and projecting in the vertical direction to create a projection histogram image,
Extracting an optimal ridge component from the projected histogram image;
Characters characterized in that a character inclination angle and range are obtained from the ridge component, an upright character image is taken out from an inclination image of a corresponding shift angle, and arranged as a character image string whose inclination is corrected in units of individual characters. Column tilt correction method.
請求項1記載の文字列の傾斜補正方法において、
前記傾斜補正された文字画像列から文字認識処理を行うことを特徴とする文字列の傾斜補正方法。
In the character string inclination correction method according to claim 1,
A character string tilt correction method, wherein character recognition processing is performed from the tilt-corrected character image string.
請求項1記載の文字列の傾斜補正方法において、
前記投影ヒストグラム画像から最適な尾根成分を抽出する処理は、投影ヒストグラム画像の空白をノード、尾根をエッジとしてグラフ表現し、そのグラフの最適経路の算出から、最適な尾根を見つけることを特徴とする文字列の傾斜補正方法。
In the character string inclination correction method according to claim 1,
The process of extracting the optimal ridge component from the projection histogram image is characterized in that the optimal histogram is found from the calculation of the optimum path of the graph by expressing the projection histogram image as a node with a blank and a ridge as an edge. A method for correcting the tilt of text.
請求項1記載の文字列の傾斜補正方法において、
前記輪郭画像の画素に対して重みを付ける処理は、輪郭画像の画素の輪郭に対して重みを付ける処理であることを特徴とする文字列の傾斜補正方法。
In the character string inclination correction method according to claim 1,
The character string inclination correction method, wherein the process of weighting the pixels of the contour image is a process of weighting the contours of the pixels of the contour image.
入力された文字列画像に対して、所定のずらし角刻みで輪郭画像を形成する輪郭画像形成手段と、
前記輪郭画像形成手段で形成された輪郭画像の画素に対して重みを付けて、垂直方向に投影して投影ヒストグラム画像を作成する投影ヒストグラム画像作成手段と、
前記投影ヒストグラム画像作成手段で作成された投影ヒストグラム画像から最適な尾根成分を抽出する尾根抽出手段と、
前記尾根抽出手段で抽出された尾根成分から文字の傾斜角度と範囲を求め、対応するずらし角度の傾斜画像から直立した文字画像を取り出して、個々の文字単位で文字画像列として配列させる文字画像抽出手段とを備えたことを特徴とする文字列の傾斜補正装置。
Contour image forming means for forming a contour image with a predetermined shift angle for the input character string image;
A projection histogram image creating means for weighting the pixels of the contour image formed by the contour image forming means and projecting in the vertical direction to create a projection histogram image;
Ridge extraction means for extracting an optimum ridge component from the projection histogram image created by the projection histogram image creation means;
Character image extraction that obtains the inclination angle and range of a character from the ridge component extracted by the ridge extraction means, extracts an upright character image from the inclination image of the corresponding shift angle, and arranges it as a character image string in units of individual characters And a character string inclination correcting device.
JP2005295237A 2005-10-07 2005-10-07 Method and apparatus for correcting inclination of character string Active JP4696239B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005295237A JP4696239B2 (en) 2005-10-07 2005-10-07 Method and apparatus for correcting inclination of character string

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005295237A JP4696239B2 (en) 2005-10-07 2005-10-07 Method and apparatus for correcting inclination of character string

Publications (3)

Publication Number Publication Date
JP2007102702A JP2007102702A (en) 2007-04-19
JP2007102702A5 true JP2007102702A5 (en) 2008-11-20
JP4696239B2 JP4696239B2 (en) 2011-06-08

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Family Applications (1)

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JP2005295237A Active JP4696239B2 (en) 2005-10-07 2005-10-07 Method and apparatus for correcting inclination of character string

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JP (1) JP4696239B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5628514B2 (en) * 2009-12-17 2014-11-19 シャープ株式会社 Image processing apparatus, image processing method, and computer program
JP5675194B2 (en) * 2010-07-15 2015-02-25 キヤノン株式会社 Image processing apparatus, image processing method, and program
CN113537216B (en) * 2021-07-22 2024-05-31 凌云光技术股份有限公司 Dot matrix font text line inclination correction method and device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH064703A (en) * 1992-06-24 1994-01-14 Matsushita Electric Ind Co Ltd Method and device for character recognition

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