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A kind of automatic focus method and automatic focus system based on skin color

A technology of auto focus and skin color, applied in the field of skin color-based auto focus and focus system, it can solve the problems of focus failure and poor Selfie effect.

Active Publication Date: 2016-11-30
MEITU
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Problems solved by technology

[0004] There are following deficiencies in this inventive method: (1) in the above-mentioned method, mainly calculate the high-frequency signal of the focusing window in each digital image; Obtain the maximum value from the high-frequency signal; Move the focusing lens group of the digital imaging device to the maximum value The lens position corresponding to the object distance to achieve focus
In this case, if the color of the clothes happens to be a high-frequency signal, it will cause the focus to be on the clothes instead of our faces, which will cause our faces not to be the main body, but the clothes to become the main body. Equivalent to focus failure
And the high-frequency part is probably not the skin color area, which causes the color of the skin color in the image we get from the selfie to be darker, resulting in a poor selfie effect

Method used

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  • A kind of automatic focus method and automatic focus system based on skin color
  • A kind of automatic focus method and automatic focus system based on skin color
  • A kind of automatic focus method and automatic focus system based on skin color

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Embodiment Construction

[0093] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0094] Such as figure 1 Shown, a kind of autofocus method based on skin color of the present invention comprises the following steps:

[0095] A. Capture the image data acquired by the camera;

[0096] B. performing face detection on the image data;

[0097] C. Judging whether a human face is detected in the image data? If not, then jump to step A; if yes, then enter step D;

[0098] D. Perform skin detection and skin color probability statistics according to the position of the face, and obtain the skin color probability and the center point positio...

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Abstract

The present invention relates to an autofocus method and autofocus system based on skin color. Face detection is performed on image data acquired by a camera, and skin detection and skin color probability statistics are performed according to the position of the face, so as to realize the autofocus function and avoid The acquisition of high-frequency signals leads to focus failure, and greatly improves the quality of the photo, ensuring that the skin will not be color cast.

Description

technical field [0001] The invention relates to a focusing method, in particular to an automatic focusing method based on skin color and a focusing system applying the method. Background technique [0002] Recently, with the continuous development of digital cameras and mobile phone cameras, taking pictures has become a common phenomenon. Generally speaking, in order to highlight the subject when taking pictures, focus will be performed. At present, most cameras and mobile phones have the function of auto focus. [0003] Regarding the auto-focus method, for example, the Chinese published patent CN101625506B discloses a face auto-focus method for a digital imaging device. In this invention, it is mainly to provide an automatic focusing method for a digital imaging device. During the focusing period of the digital imaging device, the focusing area will extend along the direction of the face to the body and at least cover the chest, so as to cover the collar of the clothes an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232H04N9/04
Inventor 张伟傅松林胡瑞鑫张长定
Owner MEITU
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