公开(公告)号：US20190108629A1

公开(公告)日：2019-04-11

申请号：US16213146

申请日：2018-12-07

Applicant: OLYMPUS CORPORATION

Inventor： Kazuhito HORIUCHI ,  Osamu KOSHIBA

IPC: G06T5/50 ,  G06T7/13 ,  G06T5/00 ,  G06T5/10 ,  G06T5/20

Abstract: An image processing device includes a computer that is configured to: detect edge-strength information expressing an edge strength in an acquired image; apply noise-reduction processing using spatial information to the image; apply noise-reduction processing using frequency information to the image; and composite a first processed image subjected to the noise-reduction processing using spatial information and a second processed image subjected to the noise-reduction processing using frequency information, by using weights in which a compositing ratio of the first processed image becomes higher than a compositing ratio of the second processed image, in a region where the edge strength, which is expressed by the detected edge-strength information, is greater than a predetermined threshold, and in which the compositing ratio of the second processed image becomes higher than the compositing ratio of the first processed image, in a region where the edge strength is less than the threshold.

公开(公告)号：US20160148385A1

公开(公告)日：2016-05-26

申请号：US14980743

申请日：2015-12-28

Applicant: OLYMPUS CORPORATION

Inventor： Osamu KOSHIBA

IPC: G06T7/00 ,  G06T7/40 ,  G06T7/20

CPC classification number: G06T7/90 ,  G06T5/002 ,  G06T7/248 ,  G06T7/74 ,  G06T7/77 ,  H04N1/58 ,  H04N1/648 ,  H04N5/367 ,  H04N9/045 ,  H04N9/07

Abstract: A similarity calculation unit calculates a similarity between pixel values of a target pixel and a reference pixel and a similarity between the pixel value of the target pixel and an average value of pixel values of reference pixels, in an input image. A weighting factor calculation unit calculates weighting factors based on the calculated similarities. A weighted average value calculation unit calculates weighted average values of the pixel value of the reference pixel and the average value of the pixel values of the reference pixels by use of the calculated weighting factors. A subtraction unit calculates a difference value between the pixel values of the target pixel and the reference pixel. An isolation degree calculation unit calculates an isolation degree based on the calculated deference value. A correction unit corrects the target pixel based on the calculated isolation degree.

Abstract translation: 相似度计算单元计算输入图像中的目标像素和参考像素的像素值之间的相似度以及目标像素的像素值与参考像素的像素值的平均值之间的相似度。 加权因子计算单元基于所计算的相似度来计算加权因子。 加权平均值计算单元使用所计算的加权因子来计算参考像素的像素值的加权平均值和参考像素的像素值的平均值。 减法单元计算目标像素和参考像素的像素值之间的差值。 隔离度计算单元基于计算出的差分值来计算隔离度。 校正单元根据计算出的隔离度校正目标像素。