公开(公告)号：US20030202682A1

公开(公告)日：2003-10-30

申请号：US10424725

申请日：2003-04-29

Applicant: NATIONAL AEROSPACE LABORATORY OF JAPAN

Inventor： Toshifumi Yanagisawa ,  Atsushi Nakajima ,  Takeo Kimura

IPC: G06K009/00

CPC classification number: G06T7/20

Abstract: From a plurality of pictures 1-1 through 1-3 captured at successive time intervals, pictures 2-1 through 2-3 of regions determined in accordance with the movement of the celestial object are cut out. By deriving median values in regard to the same pixels in each of the cut-out pictures 2-1 through 2-3, a median value picture 3-1 is created. By deriving median values, the influence of large numbers of fixed starts that hinder the detection of the moving celestial object that moves in the cut-out pictures is eliminated, and only the moving celestial object is permitted to remain. When deriving median value, pixel values indicating singular values are eliminated in advance, so that the effects of the images of large bright light sources and the lost pixels that output no pixel values are effectively reduced. Further, when an average value picture is created using a plurality of median value pictures previously obtained, the detection limit increases and a dark moving celestial object that cannot be detected using a single observation picture can be extracted.

Abstract translation: 从连续的时间间隔拍摄的多个图片1-1至1-3中，切出根据天体的移动确定的区域的图2-1至2-3。 通过对每个切出图像2-1至2-3中的相同像素导出中值，产生中值图像3-1。 通过导出中值，消除了妨碍在切出图像中移动的移动的天体的检测的大量固定开始的影响，并且仅允许移动的天体被保留。 当导出中值时，预先消除了表示奇异值的像素值，从而有效地减少了大亮度光源的图像和不输出像素值的丢失像素的影响。 此外，当使用先前获得的多个中值图像来创建平均值图像时，检测限增加，并且可以提取使用单个观察图像不能检测到的暗移动的天体。