AUTO FOCUS ADJUSTING METHOD, AUTO FOCUS ADJUSTING APPARATUS, AND DIGITAL PHOTOGRAPHING APPARATUS INCLUDING THE SAME
First Claim
1. An auto focus (AF) adjusting apparatus comprising:
- an image pickup lens in which the position of a focus lens is variable for focus adjustment;
a focus lens driver for driving the focus lens;
an image pickup device for generating an image signal by picking up light which has passed through the image pickup lens;
an AF calculator for calculating focus detection evaluation values from the image signal;
a peak detector for detecting the peak position of the focus detection evaluation values;
a shutter for controlling light exposure of the image pickup device; and
a speed calculator for calculating the moving speed of a subject by using the peak position,wherein, when continuous photographing for continuously capturing still images is performed, the peak detector detects the peak position in an image pickup interval before a light exposure preparation interval for image capturing, and the focus lens driver performs moving body compensation driving for compensating for a focal position by using the moving speed calculated in the light exposure preparation interval before capturing starts.
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Accused Products
Abstract
An auto focus (AF) adjusting method, an AF adjusting apparatus, and a digital photographing apparatus including the same, the AF adjusting apparatus including: an AF calculator for calculating focus detection evaluation values; a peak detector for detecting a peak position of the focus detection evaluation values; and a speed calculator for calculating a moving speed of a subject by using the peak position. When continuous photographing of still images is performed, the peak detector detects the peak position in an image pickup interval before a light exposure preparation interval for image capturing, and the focus lens driver performs moving body compensation driving for compensating for a focal position by using a moving speed calculated in the light exposure preparation interval before capturing starts.
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Citations
19 Claims
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1. An auto focus (AF) adjusting apparatus comprising:
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an image pickup lens in which the position of a focus lens is variable for focus adjustment; a focus lens driver for driving the focus lens; an image pickup device for generating an image signal by picking up light which has passed through the image pickup lens; an AF calculator for calculating focus detection evaluation values from the image signal; a peak detector for detecting the peak position of the focus detection evaluation values; a shutter for controlling light exposure of the image pickup device; and a speed calculator for calculating the moving speed of a subject by using the peak position, wherein, when continuous photographing for continuously capturing still images is performed, the peak detector detects the peak position in an image pickup interval before a light exposure preparation interval for image capturing, and the focus lens driver performs moving body compensation driving for compensating for a focal position by using the moving speed calculated in the light exposure preparation interval before capturing starts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An auto focus (AF) adjusting method of an AF adjusting apparatus capable of continuous photographing in which still images are continuously captured, the AF adjusting method comprising:
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generating an image signal by picking up light reflected from a subject; calculating focus detection evaluation values from the image signal; detecting the peak position of the focus detection evaluation values in an image pickup interval before a light exposure preparation interval for image capturing during the continuous photographing; calculating the moving speed of the subject by using the peak position; and compensating for a focal position by using the moving speed calculated in the light exposure preparation interval.
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18. A digital photographing apparatus capable of performing auto focus (AF) adjustment, the digital photographing apparatus comprising:
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an image pickup lens in which the position of a focus lens is variable for focus adjustment; a focus lens driver for driving the focus lens; an image pickup device for generating an image signal by picking up light which has passed through the image pickup lens; an AF calculator for calculating focus detection evaluation values from the image signal; a peak detector for detecting the peak position of the focus detection evaluation values; a shutter for controlling light exposure of the image pickup device; and a speed calculator for calculating the moving speed of a subject by using the peak position, wherein, when continuous photographing for continuously capturing still images is performed, the peak detector detects the peak position in an image pickup interval before a light exposure preparation interval for image capturing, and the focus lens driver performs moving body compensation driving for compensating for a focal position by using the moving speed calculated in the light exposure preparation interval before capturing starts. - View Dependent Claims (19)
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Specification