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    • 3. 发明授权
    • Stain detection system
    • 污渍检测系统
    • US08098302B2
    • 2012-01-17
    • US12329860
    • 2008-12-08
    • Mitsuaki FukudaSoichi HamaTakahiro AokiToshio Endoh
    • Mitsuaki FukudaSoichi HamaTakahiro AokiToshio Endoh
    • H04N5/217
    • G06T7/001H04N5/2171
    • An image pickup unit that does not have a movable system and is fixed at one point picks up an image. A subject region extraction unit detects a subject in the image, extracts a region of the subject, and generates a region extraction image. A region extraction image storage unit holds a plurality of recent region extraction images. Then, a stain level calculation unit compares the held region extraction images for each pixel, and increases a value of the stain level of a pixel when it is highly probable that a stain is present on the pixel, and vise versa. The subject region extraction and the stain level calculation are performed each time an image is picked up, and the value is updated. A stain determination unit outputs whether or not a stain is present and the degree that the stain is present on the basis of the value.
    • 不具有可移动系统且固定在一个点的图像拾取单元拾取图像。 被摄体区域提取单元检测图像中的被摄体,提取被检体的区域,并生成区域提取图像。 区域提取图像存储单元保存多个最近的区域提取图像。 然后,污点等级计算单元比较每个像素的保持区域提取图像,并且当像素上存在污点很可能时增加像素的污点水平的值,反之亦然。 每次拾取图像时,进行被摄体区域提取和污浊度计算,并且更新该值。 染色确定单元基于该值输出是否存在污点和染色的程度。