調整對焦方法METHOD FOR ADAPTIVE FOCUSING

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/161,859

專利證號

US 9,100,569 B2

專利獲證名稱

調整對焦方法METHOD FOR ADAPTIVE FOCUSING

專利所屬機關 (申請機關)

國立中正大學

獲證日期

2015/08/04

技術說明

本發明為一種具景深適應性與光圈適應性之對焦方法，其應用於一影像擷取單元，其在一影像擷取視窗內依據複數物件擷取複數第一影像，用以取得該些物件與該影像擷取單元之間之複數距離；藉此，獲得該影像擷取單元之一對焦距離；然後依據該些距離之一最大值或一最小值，而將該第一光圈調整至一第二光圈，以讓該影像擷取單元藉由第二光圈與該對焦距離獲得一完整景深，該些物件清晰出現於該完整景深內。如此本發明可在針對主題或特殊景深之需求下獲得較佳之對焦距離及景深，並以較少的曝光時間進行影像的擷取。 A focusing method having depth-of-field adaptability and aperture adaptability is provided. The method is applied to an image capture unit. A plurality of first images are captured in an image capture window according to a plurality of objects for obtaining a plurality of distances between the plurality objects and the image capture unit. Thereby, a focal length of the image capture unit is given. Then, according to a maximum value and a minimum vale of the plurality of distances, the first aperture is adjusted to a second aperture, so that the image capture unit can acquire a complete depth of field by means of the second aperture and the focal length. Accordingly, the preferred focal length and depth of field satisfying the requirements for theme or special depth of field can be acquired. In addition, image capturing can be performed for a shorter exposure time.

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