| 摘要 |
In addition to an autofocusing operation performed under visible light, an autofocusing operation is also performed under infrared light. By using infrared light, changes in the contrast can be detected accurately regardless of the character of the image. As a result, the focused position can be detected with a high degree of accuracy even in a dark image or an image in which the character of the image changes drastically. In addition, by ascertaining the difference between the infrared light focused position and the visible light focused position and correcting with the infrared light focused position, a focused matched position can be detected with an even higher degree of accuracy.
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