JP2015198388A5

JP2015198388A5 -

Info

Publication number: JP2015198388A5
Application number: JP2014076171A
Authority: JP
Filing date: 2014-04-02
Publication date: 2017-05-18
Anticipated expiration: 2034-04-02

Description

上記の目的を達成するため、本発明による画像処理装置は、画像からトリミング領域を抽出してトリミング処理を行う画像処理装置であって、前記画像において特徴的な領域を特徴領域として検出する検出手段と、前記特徴領域の少なくとも一部を含む領域をトリミング領域候補として設定する設定手段と、前記トリミング領域候補における画像信号の分布を示すヒストグラムを用いて領域評価を行う評価手段と、前記評価手段による評価結果が予め定められた条件を満たす領域を、トリミング領域として出力する出力手段と、を有し、前記評価手段は、前記ヒストグラムにおいて所定の閾値以上の頻度の区間を示す分布幅に基づいて前記トリミング領域候補に係る評価結果を得ることを特徴とする。 To achieve the above object, an image processing apparatus according to the present invention is an image processing apparatus for extracting and trimming the trimming area from images, detecting for detecting a characteristic region as a characteristic region in the image Means for setting a region including at least a part of the feature region as a trimming region candidate, an evaluation unit for performing region evaluation using a histogram indicating a distribution of image signals in the trimming region candidate, and the evaluation unit satisfying the condition region that evaluates predetermined by, possess and output means for outputting as a trimming area, wherein the evaluation unit, on the basis of the distribution width in the histogram shows a section of a predetermined threshold value or more frequently An evaluation result relating to the trimming region candidate is obtained .

本発明による制御方法は、画像からトリミング領域を抽出してトリミング処理を行う画像処理装置の制御方法であって、前記画像において特徴的な領域を特徴領域として検出する検出ステップと、前記特徴領域の少なくとも一部を含む領域をトリミング領域候補として設定する設定ステップと、前記トリミング領域候補における画像信号の分布を示すヒストグラムを用いて領域評価を行う評価ステップと、前記評価ステップによる評価結果が予め定められた条件を満たす領域を、トリミング領域として出力する出力ステップと、を有し、前記評価ステップでは、前記ヒストグラムにおいて所定の閾値以上の頻度の区間を示す分布幅に基づいて前記トリミング領域候補に係る評価結果を得ることを特徴とする。 Control method according to the present invention is a method of controlling an image processing apparatus for extracting and trimming the trimming area from images, a detection step of detecting a characteristic region as a characteristic region in the image, the feature region A setting step for setting a region including at least a part of the region as a trimming region candidate, an evaluation step for performing region evaluation using a histogram indicating a distribution of image signals in the trimming region candidate, and an evaluation result by the evaluation step is predetermined. the satisfying area that is, possess an output step of outputting as a trimming area, and in the evaluation step, according to the trimming area candidate on the basis of the distribution width in the histogram shows a section of a predetermined threshold value or more frequently An evaluation result is obtained .

本発明による制御プログラムは、画像からトリミング領域を抽出してトリミング処理を行う画像処理装置で用いられる制御プログラムであって、前記画像処理装置が備えるコンピュータに、前記画像において特徴的な領域を特徴領域として検出する検出ステップと、前記特徴領域の少なくとも一部を含む領域をトリミング領域候補として設定する設定ステップと、前記トリミング領域候補における画像信号の分布を示すヒストグラムを用いて領域評価を行う評価ステップと、前記評価ステップによる評価結果が予め定められた条件を満たす領域を、トリミング領域として出力する出力ステップと、を実行させ、前記評価ステップでは、前記ヒストグラムにおいて所定の閾値以上の頻度の区間を示す分布幅に基づいて前記トリミング領域候補に係る評価結果を得ることを特徴とする。 Control program according to the present invention is a control program used in the image processing apparatus for extracting and trimming the trimming area from images, the computer where the image processing device comprises, wherein the characteristic region in the image A detection step of detecting as a region, a setting step of setting a region including at least a part of the feature region as a trimming region candidate, and an evaluation step of performing region evaluation using a histogram indicating a distribution of image signals in the trimming region candidate And an output step of outputting, as a trimming region, a region where the evaluation result in the evaluation step satisfies a predetermined condition, and the evaluation step indicates a section having a frequency equal to or higher than a predetermined threshold in the histogram. Based on the distribution width, the trimming region candidates And wherein the obtaining the evaluation results that.

本発明によれば、画像からトリミング画像を生成する際、当該トリミング画像が単調な画像となることを抑止することができる。 According to the present invention, when a trimmed image is generated from an image , the trimmed image can be prevented from becoming a monotonous image.

Claims

An image processing apparatus that performs a trimming process to extract the crop region from the images,
Detecting means for detecting a characteristic area in the image as a characteristic area;
Setting means for setting a region including at least a part of the feature region as a trimming region candidate;
Evaluation means for performing region evaluation using a histogram indicating a distribution of image signals in the trimming region candidates;
Satisfying the condition region evaluation result by the evaluation means is a predetermined, possess and output means for outputting as a trimming area, and
The image processing apparatus , wherein the evaluation unit obtains an evaluation result related to the trimming region candidate based on a distribution width indicating a section having a frequency equal to or higher than a predetermined threshold in the histogram .

It said evaluating means, the image processing apparatus according to claim 1, characterized in that said region evaluation by using the luminance histogram showing the luminance distribution before Symbol crop region candidates.

It said evaluating means, the image processing apparatus according to claim 1, characterized in that said region evaluation using a hue histogram showing the hue distribution before Symbol crop region candidates.

The detecting device, an image processing apparatus according to any one of claims 1 to 3, characterized in that detecting a subject region showing a subject as the feature region.

The image processing apparatus according to claim 4 , wherein the feature area is a face area indicating a human face.

The said setting means sets the said trimming area | region candidate so that the content rate which shows the ratio of the said characteristic area | region contained in the said trimming area | region candidate may be settled in the predetermined range set beforehand. 4. The image processing apparatus according to any one of items 3 .

The said evaluation means further obtains the said evaluation result according to the content rate which shows the ratio of the said characteristic area | region contained in the said trimming area | region candidate, The any one of Claims 1-3 and 6 characterized by the above-mentioned. The image processing apparatus described.

And the output means, the image processing apparatus according to any one of claims 1 to 7, characterized in that selecting a crop region candidates the evaluation result is maximum as the trimming area.

And the output means, according to claim 1, wherein the evaluation result is selected as the trimming region one at random from crop region candidate is the predetermined threshold or more Image processing device.

A method for controlling an image processing apparatus that performs a trimming process to extract the crop region from the images,
A detection step of detecting a characteristic area in the image as a characteristic area;
A setting step of setting a region including at least a part of the feature region as a trimming region candidate;
An evaluation step of performing region evaluation using a histogram indicating a distribution of image signals in the trimming region candidates;
Satisfying the condition region evaluation result by the evaluation step is predetermined, it possesses an output step of outputting as a trimming area, and
In the evaluation step, an evaluation result relating to the trimming region candidate is obtained based on a distribution width indicating a section having a frequency equal to or higher than a predetermined threshold in the histogram .

A control program used in the image processing apparatus that performs a trimming process to extract the crop region from the images,
In the computer provided in the image processing apparatus,
A detection step of detecting a characteristic area in the image as a characteristic area;
A setting step of setting a region including at least a part of the feature region as a trimming region candidate;
An evaluation step of performing region evaluation using a histogram indicating a distribution of image signals in the trimming region candidates;
An output step for outputting a region where the evaluation result by the evaluation step satisfies a predetermined condition as a trimming region is executed ,
In the evaluation step, an evaluation result relating to the trimming region candidate is obtained based on a distribution width indicating a section having a frequency equal to or higher than a predetermined threshold in the histogram .