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1. 发明授权

US09530190B2 Image denoising method and image denoising apparatus 有权
公开(公告)号：US09530190B2
公开(公告)日：2016-12-27
申请号：US14721186
申请日：2015-05-26
申请人： FUJITSU LIMITED
发明人： Jianrong Wu , Zhiming Tan , Akihiro Higashi
IPC分类号： G06K9/40 , G06T5/00 , H04N5/213 , H04N5/232
摘要： The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.

2. 发明申请

US20140294318A1 GRAY IMAGE PROCESSING METHOD AND APPARATUS 有权
标题翻译：灰色图像处理方法和设备
公开(公告)号：US20140294318A1
公开(公告)日：2014-10-02
申请号：US14228729
申请日：2014-03-28
申请人： Fujitsu Limited
发明人： Jianrong Wu , Xuan Fu , Zheng Wang , Akihiro Higashi
IPC分类号： G06T5/00 , G06T5/20
CPC分类号： G06T5/002 , G06T5/10 , G06T2207/20016 , G06T2207/20064
摘要： The embodiments provide an image processing method and apparatus, which combine a wavelet transform method with a non-local means method, comprising: performing N-level decomposition of an original gray image by using a wavelet transform method; and performing non-local means processing and wavelet reconstruction of each level of components one by one starting from an N-th level, so as to obtain a processed gray image. The image processing method and apparatus can effectively remove various image noises, and well reserve the image details.
摘要翻译：实施例提供了一种组合小波变换方法与非局部装置方法的图像处理方法和装置，包括：通过使用小波变换方法来执行原始灰度图像的N级分解; 并且从N级开始逐个地执行每个等级的各个组件的非局部装置处理和小波重建，以获得经处理的灰度图像。图像处理方法和装置可以有效地去除各种图像噪声，并且很好地保留图像细节。

3. 发明授权

US09299163B2 Method and apparatus for processing edges of a gray image 有权
标题翻译：用于处理灰色图像边缘的方法和装置
公开(公告)号：US09299163B2
公开(公告)日：2016-03-29
申请号：US14290169
申请日：2014-05-29
申请人： FUJITSU LIMITED
发明人： Jianrong Wu , Xuan Fu , Akihiro Higashi
IPC分类号： G06K9/40 , G06T7/40 , G06T5/20
CPC分类号： G06T7/408 , G06T5/20 , G06T7/90 , G06T2207/10004 , G06T2207/20021 , G06T2207/20052
摘要： A method and apparatus for processing a gray image, including: calculating a mean value and a standard difference of each edge pixel needing processing in an original gray image, and determining a predefined noise variance of each edge pixel according to the mean value and the standard difference; performing two-dimensional discrete cosine transform on an original gray image of a first adjacent area of each edge pixel; performing Wiener filtering on the two-dimensional discrete cosine transformed image data according to the noise variance; performing discrete cosine inverse transform on the two-dimensional Wiener filtered image data to obtain a filtered gray image of the first adjacent area; and extracting a filtered pixel value of each edge pixel from the filtered gray image of the first adjacent area, and obtaining a processed pixel value of each edge pixel by performing weighted summation on the filtered pixel value and an original pixel value.
摘要翻译：一种用于处理灰度图像的方法和装置，包括：计算原始灰度图像中每个边缘像素需要处理的平均值和标准差，以及根据平均值和标准确定每个边缘像素的预定噪声方差区别; 对每个边缘像素的第一相邻区域的原始灰度图像执行二维离散余弦变换; 根据噪声方差对二维离散余弦变换图像数据进行维纳滤波; 对二维维纳滤波图像数据进行离散余弦逆变换以获得第一相邻区域的滤波灰度图像; 以及从所述第一相邻区域的经滤波的灰度图像提取每个边缘像素的滤波像素值，并且通过对所述滤波像素值和原始像素值执行加权求和来获得每个边缘像素的经处理像素值。

4. 发明授权

US09167175B2 Flicker detection method and flicker detection apparatus 有权
标题翻译：闪烁检测方法和闪烁检测装置
公开(公告)号：US09167175B2
公开(公告)日：2015-10-20
申请号：US14336283
申请日：2014-07-21
申请人： FUJITSU LIMITED
发明人： Jianrong Wu , Xuan Fu , Akihiro Higashi
IPC分类号： H04N9/73 , H04N5/235 , H04N5/14
CPC分类号： H04N5/2357 , H04N5/145
摘要： The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector; building a first square wave and a second square wave, and a third square wave and a fourth square wave; calculating a first frequency reference value; calculating a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present.
摘要翻译：本发明公开了一种闪烁检测方法和闪烁检测装置。该方法包括：计算图像帧的所选行的平均值以构成平均值向量; 计算当前帧的平均值向量与前一帧的差分向量; 计算无DC差分矢量; 构造第一方波和第二方波，以及第三方波和第四方波; 计算第一频率参考值; 计算第二频率参考值; 并且如果第一和第二频率参考值之间的差异高于阈值，则确定在当前帧中存在闪烁; 否则，确定不存在闪烁。

5. 发明授权

US09558537B2 Image denoising method and image denoising apparatus 有权
标题翻译：图像去噪方法和图像去噪装置
公开(公告)号：US09558537B2
公开(公告)日：2017-01-31
申请号：US14721186
申请日：2015-05-26
申请人： FUJITSU LIMITED
发明人： Jianrong Wu , Zhiming Tan , Akihiro Higashi
IPC分类号： G06K9/40 , G06T5/00 , H04N5/213 , H04N5/232
CPC分类号： G06T5/002 , G06T2207/10004 , G06T2207/20024 , G06T2207/20052 , H04N5/213 , H04N5/232
摘要： The present invention provides an image denoising method and an image denoising apparatus. The image denoising method includes performing preliminary denoising processing to an acquired image to be processed, so as to obtain a preliminarily denoised image; calculating a residual quantity corresponding to a central pixel of each unit area in the image to be processed according to numerical values of specific energy parameters to which the image to be processed and the preliminarily denoised image correspond, respectively; and using the residual quantity to calculate a weight matrix corresponding to each unit area, and performing non-local mean value calculation to the image to be processed according to the weight matrix, so as to realize the denoising processing of the image to be processed. The image denoising method is able to denoise effectively, and make a denoised image more visually natural.
摘要翻译：本发明提供一种图像去噪方法和图像去噪装置。图像去噪方法包括对获取的被处理图像执行初步去噪处理，以获得预先去噪的图像; 根据要处理的图像和预先去噪图像对应的特定能量参数的数值分别计算与待处理图像中的每个单位区域的中心像素相对应的残留量; 并且使用剩余量来计算与每个单位面积对应的加权矩阵，并且根据加权矩阵对要处理的图像执行非局部平均值计算，以便实现要处理的图像的去噪处理。图像去噪方法能够有效地去噪，并使视觉上更自然的去噪图像。

6. 发明授权

US09443286B2 Gray image processing method and apparatus based on wavelet transformation 有权
标题翻译：基于小波变换的灰度图像处理方法和装置
公开(公告)号：US09443286B2
公开(公告)日：2016-09-13
申请号：US14228729
申请日：2014-03-28
申请人： Fujitsu Limited
发明人： Jianrong Wu , Xuan Fu , Zheng Wang , Akihiro Higashi
IPC分类号： G06K9/40 , G06T5/00 , G06T5/10
CPC分类号： G06T5/002 , G06T5/10 , G06T2207/20016 , G06T2207/20064
摘要： The embodiments provide an image processing method and apparatus, which combine a wavelet transform method with a non-local means method, comprising: performing N-level decomposition of an original gray image by using a wavelet transform method; and performing non-local means processing and wavelet reconstruction of each level of components one by one starting from an N-th level, so as to obtain a processed gray image. The image processing method and apparatus can effectively remove various image noises, and well reserve the image details.
摘要翻译：实施例提供了一种组合小波变换方法与非局部装置方法的图像处理方法和装置，包括：通过使用小波变换方法来执行原始灰度图像的N级分解; 并且从N级开始逐个地执行每个等级的各个组件的非局部装置处理和小波重建，以获得经处理的灰度图像。图像处理方法和装置可以有效地去除各种图像噪声，并且很好地保留图像细节。

7. 发明授权

US09148583B2 Flicker detection method and flicker detection apparatus 有权
标题翻译：闪烁检测方法和闪烁检测装置
公开(公告)号：US09148583B2
公开(公告)日：2015-09-29
申请号：US14336281
申请日：2014-07-21
申请人： FUJITSU LIMITED
发明人： Jianrong Wu , Xuan Fu , Akihiro Higashi
IPC分类号： H04N5/235 , H04N5/14
CPC分类号： H04N5/2357 , H04N5/144
摘要： The present invention discloses a flicker detection method and a flicker detection apparatus. The method includes: calculating the mean values of selected rows of image frames to constitute a mean value vector; calculating a differential vector between the mean value vectors of a current frame and a previous frame; calculating a DC-free difference vector by subtracting a direct current component from respective elements of the differential vector; calculating a power spectrum corresponding to the DC-free difference vector; obtaining a first frequency reference value; obtaining a second frequency reference value; and if the difference between the first and second frequency reference values is above a threshold, then it is determined that flicker is present in the current frame; otherwise, it is determined that no flicker is present.
摘要翻译：本发明公开了一种闪烁检测方法和闪烁检测装置。该方法包括：计算图像帧的所选行的平均值以构成平均值向量; 计算当前帧的平均值向量与前一帧的差分向量; 通过从差分矢量的各个元素中减去直流分量来计算无DC差分矢量; 计算与无DC差分矢量对应的功率谱; 获得第一频率参考值; 获得第二频率参考值; 并且如果第一和第二频率参考值之间的差异高于阈值，则确定在当前帧中存在闪烁; 否则，确定不存在闪烁。

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