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    • 2. 发明申请
    • DETERMINING OPTIMAL POSITIONING OF OPHTHALMIC DEVICES BY USE OF IMAGE PROCESSING AND AUTOFOCUSING TECHNIQUES
    • 通过图像处理和自动绘图技术确定眼科装置的最佳定位
    • WO2007079076A3
    • 2007-08-30
    • PCT/US2006049264
    • 2006-12-21
    • ALCON REFRACTIVE HORIZONS INCCAMPIN JOHN ABOWES JOHN J
    • CAMPIN JOHN ABOWES JOHN J
    • A61F9/01A61B3/10
    • A61F9/00802A61B3/0075A61B3/0083A61B3/10A61B3/145A61F2009/00872G06T7/571G06T2207/30041
    • A system (200) or method of positioning an ophthalmic device relative to an eye is provided. The method first obtains a series of images of an eye. In these series of images, the distance between the ophthalmic device and the eye is varied while the region of the eye image remains substantially the same. It is possible then to process these images to determine the high frequency content associated with each image. By comparing the high frequency content associated with each image, it is possible to determine which image has the largest amount of high frequency content. The high frequency content is maximized when the image is the sharpest. An optimally focused image will have the largest amount of high frequency content . By examining the high frequency content associate with the series of images is impossible to adjust the relative position and distance between the eye and the ophthalmic device to the distance associated with the image having the largest amount of high frequency content (i.e., optimally focused) .
    • 提供了一种相对于眼睛定位眼科装置的系统(200)或方法。 该方法首先获得一系列的眼睛图像。 在这些系列图像中,眼睛装置与眼睛之间的距离是变化的,而眼睛图像的区域保持基本相同。 然后可以处理这些图像以确定与每个图像相关联的高频内容。 通过比较与每个图像相关联的高频内容,可以确定哪个图像具有最大量的高频内容。 当图像最清晰时,高频内容最大化。 最佳聚焦图像将具有最大量的高频内容。 通过检查与该系列图像相关联的高频内容不可能将眼睛和眼科装置之间的相对位置和距离调整为与具有最大量的高频内容(即,最佳聚焦)的图像相关联的距离。
    • 9. 发明公开
    • IMAGE DEINTERLACING SYSTEM FOR REMOVING MOTION ARTIFACTS AND ASSOCIATED METHODS
    • BILDESCHUTTELUNGSSYSTEM ZUM ENTFERNEN VON BEWEGUNGSARTEFAKTEN UND ZUGEORDNETE VERFAHREN
    • EP1520411A4
    • 2005-08-03
    • EP03728497
    • 2003-04-22
    • ALCON REFRACTIVE HORIZONS INC
    • GRAY GARY PAUL
    • H04N7/01H04N5/44H04N7/12H04N11/00H04N11/20
    • H04N7/012
    • Deinterlacing is applied to a composite video image that includes alternating even and odd rows of pixels. The even rows form a first image; the odd rows, a second image; these are recorded at different times, introducing a possibility of motion artifact. A first average horizontal intensity difference is computed (105) between the first image and the second image. The first image is offset (106) by one pixel in each horizontal direction to form a horizontally offset image, and another average horizontal intensity difference is computed (107). A minimum average intensity difference is determined (110) from a comparison of the average horizontal intensity differences. The first image is shifted (113) in a horizontal direction determined to achieve the minimum average horizontal intensity difference, and the horizontally shifted first image is combined (114) with the second image to form an imiproved composite image. An analogous series of steps is carried out in a vertical direction.
    • 将隔行扫描应用于包含偶数行和奇数行像素的复合视频图像。 偶数行形成第一个图像; 奇数行,第二个图像; 这些记录在不同的时间,引入运动伪影的可能性。 在第一图像和第二图像之间计算(105)第一平均水平强度差。 第一图像在每个水平方向上偏移(106)一个像素以形成水平偏移图像,并计算另一平均水平亮度差(107)。 根据平均水平强度差的比较确定(110)最小平均强度差。 第一图像在确定为实现最小平均水平强度差的水平方向上被移位(113),并且水平移动的第一图像与第二图像组合(114)以形成非模型化合成图像。 在垂直方向上执行类似的一系列步骤。