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    • 1. 发明授权
    • Detecting compositional change in image
    • 检测图像中的组成变化
    • US6067114A
    • 2000-05-23
    • US736640
    • 1996-10-24
    • Kyoichi OmataManabu KiriToshiki Miyano
    • Kyoichi OmataManabu KiriToshiki Miyano
    • G03B13/36G02B7/28G06T7/20H04N5/232G03B13/00
    • H04N5/23212
    • A method obtains an electrical signal from the photoelectric detector, which signal corresponds to the illumination of the image formed by the focusing lens. The image screen is divided into a plurality of subdivision areas. The method then calculates for the respective subdivision areas a focus evaluation value representative of a high frequency component contained in the electrical signal and a brightness value representative of a brightness of the image. The subdivision areas are sorted in accordance with a object distance classification. The method weights with different weights the subdivision areas on the basis of the subdivision area to which a main object belongs. Variations in the focus evaluation and brightness values are calculated by comparing the values after a focus and the values for an in-focus image. Compositional changes are detected based on the weights and the variation in the focus evaluation and brightness values.
    • 方法从光电检测器获得电信号,该信号对应于由聚焦透镜形成的图像的照明。 图像屏幕被分成多个细分区域。 然后,该方法针对相应的细分区域计算代表电信号中包含的高频分量的聚焦评估值和表示图像的亮度的亮度值。 细分区域根据对象距离分类进行排序。 该方法根据主要对象所属的细分区域以不同的权重重新分配区域。 通过比较聚焦后的值和对焦图像的值来计算焦点评估和亮度值的变化。 基于权重和焦点评估和亮度值的变化检测组成变化。
    • 4. 发明授权
    • Focusing device
    • 聚焦装置
    • US06441855B1
    • 2002-08-27
    • US09571875
    • 2000-05-09
    • Kyoichi OmataToshiki MiyanoManabu Kiri
    • Kyoichi OmataToshiki MiyanoManabu Kiri
    • G03B1300
    • H04N5/23212G02B7/34G02B7/346
    • A focusing device includes a movable focusing lens adapted to be moved to different positions, a conversion element for converting light incident on and transmitted through the focusing lens into a signal, and a lens driving mechanism for moving the focusing lens. The focusing device further includes a focus evaluation value calculation unit for calculating a focus evaluation value for each position of the focusing lens based on the signal from the conversion element, and a lens position specifying unit for specifying a position of the focusing lens causing a maximum focus evaluation value as an in-focus lens position. The lens driving mechanism moves the focusing lens in response to the in-focus lens position specified by the lens position specifying unit. The focus evaluation value calculation unit, in response to a plurality of observation areas, calculates a focus evaluation value through addition of partial focus evaluation values obtained for the respective observation areas, and weights the partial focus evaluation value for at least one of the plurality of observation areas on the basis of said signal to position the focusing lens.
    • 聚焦装置包括适于移动到不同位置的可移动聚焦透镜,用于将入射到聚焦透镜上并透过聚焦透镜的光转换成信号的转换元件,以及用于移动聚焦透镜的透镜驱动机构。 聚焦装置还包括焦点评估值计算单元,用于基于来自转换元件的信号计算聚焦透镜的每个位置的聚焦评估值,以及透镜位置确定单元,用于指定聚焦透镜的位置,使得最大 焦点评估值作为对焦透镜位置。 透镜驱动机构响应于由透镜位置指定单元指定的对焦透镜位置移动聚焦透镜。 焦点评估值计算单元响应于多个观察区域,通过添加对各个观察区域获得的部分焦点评估值来计算焦点评估值,并且对多个观察区域中的至少一个的部分焦点评估值进行加权 基于所述信号的观察区域来定位聚焦透镜。