JP2010191968A5 - Image enhancement apparatus, image enhancement method and image enhancement program - Google Patents

Image enhancement apparatus, image enhancement method and image enhancement program Download PDF

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JP2010191968A5
JP2010191968A5 JP2010035332A JP2010035332A JP2010191968A5 JP 2010191968 A5 JP2010191968 A5 JP 2010191968A5 JP 2010035332 A JP2010035332 A JP 2010035332A JP 2010035332 A JP2010035332 A JP 2010035332A JP 2010191968 A5 JP2010191968 A5 JP 2010191968A5
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撮影された画像の画素ごとのカラー及び濃淡の拡散反射輝度を示す全拡散反射輝度を計算する全拡散反射輝度計算部と、
前記全拡散反射輝度計算部によって計算された画素ごとの全拡散反射輝度に基づいて、画素ごとを高輝度画素又は非高輝度画素に分類する画素分類部と、
前記画素分類部によって分類された非高輝度画素ごとに対して、当該非高輝度画素の全拡散反射輝度に基づいて、当該非高輝度画素の彩度を強調する彩度強調部と
を有することを特徴とする画像強調装置。 A total diffuse reflection luminance calculation unit which calculates total diffuse reflection luminance indicating diffuse reflection luminance of color and density for each pixel of a captured image;
A pixel classification unit that classifies each pixel as a high brightness pixel or a non-high brightness pixel based on the total diffuse reflection brightness for each pixel calculated by the total diffuse reflection brightness calculation unit;
And a saturation emphasizing unit for emphasizing the saturation of the non-high luminance pixel based on the total diffuse reflection luminance of the non-high luminance pixel for each of the non-high luminance pixels classified by the pixel classification unit. An image enhancement device characterized by 前記彩度強調部は、前記画素分類部によって分類された高輝度画素ごとに対して、当該高輝度画素の色相及び彩度を維持したまま、当該高輝度画素の輝度を画像の平均輝度まで低下させる輝度低下部The saturation emphasizing unit reduces the luminance of the high luminance pixel to the average luminance of the image while maintaining the hue and the saturation of the high luminance pixel with respect to each high luminance pixel classified by the pixel classification unit. Reduced brightness part
をさらに含むことを特徴とする請求項１に記載の画像強調装置。The image enhancing apparatus according to claim 1, further comprising: 前記画素分類部は、The pixel classification unit
前記画素の全拡散反射輝度に基づいて、前記画素の拡散反射成分を計算する拡散反射成分計算部と、A diffuse reflection component calculation unit that calculates the diffuse reflection component of the pixel based on the total diffuse reflection luminance of the pixel;
前記拡散反射成分計算部によって計算された拡散反射成分と所定の閾値とを色成分ごとに比較する比較部と、A comparison unit that compares the diffuse reflection component calculated by the diffuse reflection component calculation unit with a predetermined threshold for each color component;
前記比較部によって比較された拡散反射成分が、いずれの色成分においても所定の閾値より小さい場合には、前記画素を非高輝度画素であると判定し、いずれかの色成分において所定の閾値より大きい場合には、前記画素を高輝度画素であると判定する判定部とIf the diffuse reflection component compared by the comparison unit is smaller than a predetermined threshold for any color component, the pixel is determined to be a non-high luminance pixel, and any of the color components is determined to have a predetermined threshold When the pixel is large, a determination unit that determines that the pixel is a high luminance pixel and
をさらに含むことを特徴とする請求項１に記載の画像強調方法。The image enhancement method according to claim 1, further comprising: 対象画像の輝度を強調する際の係数である対象画像強度を試算する対象画像強度試算部と、A target image strength estimation unit for calculating a target image strength which is a coefficient for emphasizing the luminance of the target image;
前記画素ごとに対して、当該画素の対象画像強度に基づいて対象画像を強調する対象画像強調部とA target image emphasizing unit for emphasizing the target image based on the target image intensity of the pixel for each of the pixels;
をさらに有することを特徴とする請求項１に記載の画像強調装置。The image enhancing apparatus according to claim 1, further comprising: 前記対象画像強度試算部は、The target image strength calculation unit
画像の背景輝度画像を抽出する背景輝度画像抽出部と、A background luminance image extraction unit that extracts a background luminance image of the image;
前記画像の輝度画像と前記抽出した背景輝度画像との差分画像を取得する差分画像取得部と、  A difference image acquisition unit that acquires a difference image between the luminance image of the image and the extracted background luminance image;
前記画像の対象画像の輝度極値を試算する対象画像の輝度極値試算部と、A luminance extreme value calculation unit for calculating a luminance extreme value of the target image of the image;
前記差分画像取得部によって取得された差分画像と前記対象画像の輝度極値試算部によって試算された対象画像の輝度極値とに基づいて、前記画像における画素ごとの対象画像強度を計算する対象画像強度計算部とA target image for calculating a target image strength for each pixel in the image based on the difference image acquired by the difference image acquisition unit and the luminance extreme of the target image estimated by the luminance extreme value estimation unit of the target image Strength calculation unit and
をさらに含むことを特徴とする請求項４に記載の画像強調装置。The image enhancing apparatus according to claim 4, further comprising: 前記背景輝度画像抽出部は、画素ごとに対して、当該画素が隣接する領域内の画素の輝度平均値を前記画素の背景輝度として計算する背景輝度計算部The background brightness calculating unit calculates, for each pixel, the average brightness of pixels in an area adjacent to the pixel as the background brightness of the pixel.
を含むことを特徴とする請求項５に記載の画像強調装置。The image enhancing apparatus according to claim 5, comprising: 前記背景輝度画像抽出部は、画素ごとに対して、当該画素が隣接する領域内の画素の輝度が前記画素の背景輝度に所定の係数を掛けた輝度より大きい画素を選択する画素選択部と、The background luminance image extraction unit selects, for each pixel, a pixel selection unit that selects a pixel whose luminance in a region adjacent to the pixel is greater than the luminance obtained by multiplying the background luminance of the pixel by a predetermined coefficient.
前記画素選択部によって選択された画素の輝度平均値を前記画素の背景輝度として計算し、当該計算を所定の回数反復する背景輝度反復計算部とA background luminance repetitive calculation unit which calculates a luminance average value of the pixels selected by the pixel selection unit as a background luminance of the pixels and repeats the calculation a predetermined number of times;
をさらに含むことを特徴とする請求項６に記載の画像強調装置。The image enhancing apparatus according to claim 6, further comprising: 前記対象画像の輝度極値試算部は、画素ごとに対して、前記画素の少なくとも一方向における対象画像の輝度極値を計算する対象画像の輝度極値計算部と、The luminance extreme value calculation unit of the target image is, for each pixel, a luminance extreme value calculation unit of a target image for calculating a luminance extreme value of the target image in at least one direction of the pixels;
前記対象画像の輝度極値計算部によって計算された対象画像輝度極値の最大値を前記画素の輝度極値として判定する対象画像の輝度極値判定部とA luminance extreme determination unit of a target image that determines the maximum value of the target image luminance extreme calculated by the luminance extreme calculation unit of the target image as the luminance extreme of the pixel;
を含むことを特徴とする請求項５に記載の画像強調装置。The image enhancing apparatus according to claim 5, comprising: 前記対象画像強調部は、前記画素の対象画像強度と全拡散反射輝度とに基づいて、前記画素の輝度を補正する輝度補正部The target image emphasizing unit corrects the luminance of the pixel based on the target image intensity of the pixel and the total diffuse reflection luminance.
をさらに含むことを特徴とする請求項４に記載の画像強調装置。The image enhancing apparatus according to claim 4, further comprising: 画像強調装置が、
撮影された画像の画素ごとのカラー及び濃淡の拡散反射輝度を示す全拡散反射輝度を計算する全拡散反射輝度計算ステップと、
前記全拡散反射輝度計算ステップによって計算された画素ごとの全拡散反射輝度に基づいて、画素ごとを高輝度画素又は非高輝度画素に分類する画素分類ステップと、
前記画素分類ステップによって分類された非高輝度画素ごとに対して、当該非高輝度画素の全拡散反射輝度に基づいて、当該非高輝度画素の彩度を強調する彩度強調ステップと
を実行することを特徴とする画像強調方法。 The image enhancement device
Total diffuse reflection luminance calculation step of calculating total diffuse reflection luminance indicating diffuse reflection luminance of color and density for each pixel of the photographed image;
A pixel classification step of classifying each pixel into a high luminance pixel or a non-high luminance pixel based on the total diffuse reflection luminance for each pixel calculated by the total diffuse reflection luminance calculating step;
Performing a saturation emphasizing step of emphasizing the saturation of the non-high luminance pixel based on the total diffuse reflection luminance of the non-high luminance pixel for each of the non-high luminance pixels classified in the pixel classification step; Image enhancement method characterized by コンピュータに、On the computer
撮影された画像の画素ごとのカラー及び濃淡の拡散反射輝度を示す全拡散反射輝度を計算する全拡散反射輝度計算ステップと、Total diffuse reflection luminance calculation step of calculating total diffuse reflection luminance indicating diffuse reflection luminance of color and density for each pixel of the photographed image;
前記全拡散反射輝度計算ステップによって計算された画素ごとの全拡散反射輝度に基づいて、画素ごとを高輝度画素又は非高輝度画素に分類する画素分類ステップと、A pixel classification step of classifying each pixel into a high luminance pixel or a non-high luminance pixel based on the total diffuse reflection luminance for each pixel calculated by the total diffuse reflection luminance calculating step;
前記画素分類ステップによって分類された非高輝度画素ごとに対して、当該非高輝度画素の全拡散反射輝度に基づいて、当該非高輝度画素の彩度を強調する彩度強調ステップとA saturation emphasizing step of emphasizing the saturation of the non-high luminance pixel based on the total diffuse reflection luminance of the non-high luminance pixel for each non-high luminance pixel classified in the pixel classification step;
を実行させることを特徴とする画像強調プログラム。An image enhancement program characterized by causing
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CN103514588B (en) * 2013-10-10 2016-05-18 广东威创视讯科技股份有限公司 Image enchancing method and system
CN103903229B (en) * 2014-03-13 2017-01-04 中安消技术有限公司 A kind of evening images Enhancement Method and device
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US7426312B2 (en) * 2005-07-05 2008-09-16 Xerox Corporation Contrast enhancement of images
WO2007029446A1 (en) * 2005-09-01 2007-03-15 Matsushita Electric Industrial Co., Ltd. Image processing method, image processing device, and image processing program

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