Canon PowerShot ELPH 170 IS Blue 手册

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页码 216
94
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 Contents
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 Chapter Contents
Still Images
Movies
Face AiAF
• 
Detects people’s faces, and then sets the focus, exposure 
(evaluative metering only), and white balance ([
] only).
• 
After you aim the camera at the subject, a white frame is 
displayed around the person’s face determined by the camera 
to be the main subject, and up to two gray frames are displayed 
around other detected faces.
• 
When the camera detects movement, frames will follow moving 
subjects, within a certain range.
• 
After you press the shutter button halfway, up to nine green 
frames are displayed around faces in focus.
• 
If faces are not detected, or when only gray frames are 
displayed (without a white frame), up to nine green frames 
are displayed in the areas in focus when you press the 
shutter button halfway.
• 
If faces are not detected when Servo AF (
[On], the AF frame is displayed in the center of the screen 
when you press the shutter button halfway.
• 
Examples of faces that cannot be detected:
Subjects that are distant or extremely close
Subjects that are dark or light
Faces in profile, at an angle, or partly hidden
• 
The camera may misinterpret non-human subjects as 
faces.
• 
No AF frames are displayed if the camera cannot focus 
when you press the shutter button halfway.