JP2013211734A5 - - Google Patents
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- JP2013211734A5 JP2013211734A5 JP2012081336A JP2012081336A JP2013211734A5 JP 2013211734 A5 JP2013211734 A5 JP 2013211734A5 JP 2012081336 A JP2012081336 A JP 2012081336A JP 2012081336 A JP2012081336 A JP 2012081336A JP 2013211734 A5 JP2013211734 A5 JP 2013211734A5
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Description
領域検出部１０５は、入力画像をカラー領域とモノクロ領域に区分する。具体的には、領域検出部１０５は、モノクロ／カラー再判定結果ｍｃ＿ｒに基づいて、カラー領域と再判定された分割領域からなるカラー領域を決定し、決定したカラー領域を表す座標情報ｐｏをγ補正部１０６に出力する。本実施例では、座標情報ｐｏは、カラー領域の始点である左上座標（ｘ座標（水平方向座標），ｙ座標（垂直方向座標））と終点である右下座標（ｘ座標，ｙ座標）を含むものとする。 The area detection unit 105 divides the input image into a color area and a monochrome area. Specifically, the area detection unit 105 determines a color area including divided areas that have been redetermined as a color area based on the monochrome / color redetermination result mc_r, and sets coordinate information po representing the determined color area to γ The data is output to the correction unit 106 . In this embodiment, the coordinate information po includes the upper left coordinates (x coordinate (horizontal coordinate), y coordinate (vertical coordinate)) that are the start point of the color area and the lower right coordinate (x coordinate, y coordinate) that is the end point. Shall be included.
Claims (12)
前記分割領域毎に、前記取得手段で取得されたその分割領域の統計量と第１の閾値を比較して、当該分割領域がカラー領域かモノクロ領域かを判定する判定手段と、
前記判定手段でモノクロ領域と判定された分割領域のうち、前記判定手段でカラー領域と判定された分割領域に隣接する分割領域である隣接分割領域毎に、その隣接分割領域の統計量と、前記第１の閾値よりも分割領域がカラー領域と判定されやすい第２の閾値とを比較して、当該隣接分割領域がカラー領域かモノクロ領域かを再判定する再判定手段と、を有することを特徴とする画像処理装置。 Obtaining means for obtaining a statistic of a pixel value for each divided region obtained by dividing the input image;
For each of the divided areas, a determination unit that compares the statistic of the divided area acquired by the acquisition unit with a first threshold value and determines whether the divided area is a color area or a monochrome area;
Among the divided areas determined as the monochrome area by the determining means, for each adjacent divided area that is adjacent to the divided area determined as the color area by the determining means, the statistics of the adjacent divided areas, Re-determination means for re-determining whether the adjacent divided area is a color area or a monochrome area by comparing the second threshold value with which the divided area is more easily determined as a color area than the first threshold value An image processing apparatus.
ことを特徴とする請求項１に記載の画像処理装置。 For each of the adjacent divided areas, the pixel value statistics of the adjacent divided areas and the pixels of the peripheral divided areas that are the divided areas around the adjacent divided areas among the divided areas determined as the monochrome areas by the determining unit. The image processing apparatus according to claim 1, further comprising a calculation unit configured to calculate a second threshold value based on a value statistic.
前記割合が大きいときに算出される第２の閾値は、前記割合が小さいときに算出される第２の閾値よりも、分割領域がカラー領域と判定されやすい閾値である
ことを特徴とする請求項２に記載の画像処理装置。 The calculation means calculates a second threshold value based on a ratio of the number of monochrome pixels to the total number of pixels of the area obtained by combining the adjacent divided area and the peripheral divided area of the adjacent divided area,
The second threshold value calculated when the ratio is large is a threshold value that makes it easier to determine that the divided area is a color area than the second threshold value calculated when the ratio is small. 2. The image processing apparatus according to 2.
前記均一性が高いときに算出される第２の閾値は、前記均一性が低いときに算出される第２の閾値よりも、分割領域がカラー領域と判定されやすい閾値である
ことを特徴とする請求項２に記載の画像処理装置。 The calculation means calculates a second threshold value based on the uniformity of pixel values of a region obtained by combining the adjacent divided region and a peripheral divided region of the adjacent divided region,
The second threshold value calculated when the uniformity is high is a threshold value that makes it easier to determine that the divided area is a color area than the second threshold value calculated when the uniformity is low. The image processing apparatus according to claim 2.
前記均一性が高いときに算出される第２の閾値は、前記均一性が低いときに算出される第２の閾値よりも、分割領域がカラー領域と判定されやすい閾値である
ことを特徴とする請求項１に記載の画像処理装置。 For each of the adjacent divided areas, further comprises a calculation means for calculating a second threshold based on the uniformity of the pixel values of the adjacent divided areas,
The second threshold value calculated when the uniformity is high is a threshold value that makes it easier to determine that the divided area is a color area than the second threshold value calculated when the uniformity is low. The image processing apparatus according to claim 1.
ことを特徴とする請求項２〜４のいずれか１項に記載の画像処理装置。 The image processing apparatus according to claim 2, wherein the peripheral divided area is a divided area that is continuous in a horizontal direction or a vertical direction with respect to the adjacent divided area.
前記分割領域毎に、前記取得ステップで取得されたその分割領域の統計量と第１の閾値を比較して、当該分割領域がカラー領域かモノクロ領域かを判定する判定ステップと、
前記判定ステップでモノクロ領域と判定された分割領域のうち、前記判定ステップでカラー領域と判定された分割領域に隣接する分割領域である隣接分割領域毎に、その隣接分割領域の統計量と、前記第１の閾値よりも分割領域がカラー領域と判定されやすい第２の閾値とを比較して、当該隣接分割領域がカラー領域かモノクロ領域かを再判定する再判定ステップと、
を有することを特徴とする画像処理装置の制御方法。 An acquisition step of acquiring a statistic of a pixel value for each divided region obtained by dividing the input image;
For each of the divided areas, a determination step of comparing the divided area statistics acquired in the obtaining step with a first threshold value to determine whether the divided area is a color area or a monochrome area;
Among the divided areas determined as the monochrome area in the determination step, for each adjacent divided area that is adjacent to the divided area determined as the color area in the determination step, the statistics of the adjacent divided areas, A re-determination step that compares the second threshold value, which is more likely to be determined as a color area than the first threshold value, and re-determines whether the adjacent divided area is a color area or a monochrome area;
A control method for an image processing apparatus, comprising:
ことを特徴とする請求項７に記載の画像処理装置の制御方法。8. A method for controlling an image processing apparatus according to claim 7, wherein:
前記割合が大きいときに算出される第２の閾値は、前記割合が小さいときに算出される第２の閾値よりも、分割領域がカラー領域と判定されやすい閾値である The second threshold value calculated when the ratio is large is a threshold value that makes it easier to determine that the divided area is a color area than the second threshold value calculated when the ratio is small.
ことを特徴とする請求項８に記載の画像処理装置の制御方法。The method of controlling an image processing apparatus according to claim 8.
前記均一性が高いときに算出される第２の閾値は、前記均一性が低いときに算出される第２の閾値よりも、分割領域がカラー領域と判定されやすい閾値である The second threshold value calculated when the uniformity is high is a threshold value that makes it easier to determine that the divided area is a color area than the second threshold value calculated when the uniformity is low.
ことを特徴とする請求項８に記載の画像処理装置の制御方法。The method of controlling an image processing apparatus according to claim 8.
前記均一性が高いときに算出される第２の閾値は、前記均一性が低いときに算出される第２の閾値よりも、分割領域がカラー領域と判定されやすい閾値である The second threshold value calculated when the uniformity is high is a threshold value that makes it easier to determine that the divided area is a color area than the second threshold value calculated when the uniformity is low.
ことを特徴とする請求項７に記載の画像処理装置の制御方法。8. A method for controlling an image processing apparatus according to claim 7, wherein:
ことを特徴とする請求項８〜１０のいずれか１項に記載の画像処理装置の制御方法。The method of controlling an image processing apparatus according to claim 8, wherein the image processing apparatus is a control method.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012081336A JP5930804B2 (en) | 2012-03-30 | 2012-03-30 | Image processing apparatus and control method thereof |
| US13/797,080 US9135718B2 (en) | 2012-03-30 | 2013-03-12 | Image processing apparatus and control method therefor |
| US14/520,982 US20150043813A1 (en) | 2012-03-30 | 2014-10-22 | Image processing apparatus and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012081336A JP5930804B2 (en) | 2012-03-30 | 2012-03-30 | Image processing apparatus and control method thereof |
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| Publication Number | Publication Date |
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| JP2013211734A JP2013211734A (en) | 2013-10-10 |
| JP2013211734A5 true JP2013211734A5 (en) | 2015-05-14 |
| JP5930804B2 JP5930804B2 (en) | 2016-06-08 |
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| JP2012081336A Expired - Fee Related JP5930804B2 (en) | 2012-03-30 | 2012-03-30 | Image processing apparatus and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11331626A (en) * | 1998-03-09 | 1999-11-30 | Minolta Co Ltd | Image processor |
| JP4064701B2 (en) * | 2002-02-19 | 2008-03-19 | ニスカ株式会社 | Image determination method and image determination apparatus |
| JP3804548B2 (en) * | 2002-02-26 | 2006-08-02 | 富士ゼロックス株式会社 | Image processing device |
| JP4647518B2 (en) * | 2006-02-27 | 2011-03-09 | 富士フイルム株式会社 | Imaging device |
| JP4380696B2 (en) * | 2006-12-27 | 2009-12-09 | 株式会社リコー | Image processing device |
| JP2011023999A (en) * | 2009-07-16 | 2011-02-03 | Fuji Xerox Co Ltd | Image reading apparatus |
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