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A mobile terminal and method for acquiring focus value

A mobile terminal and focusing value technology, which is applied in the direction of focusing devices, equipment with sensors, color TV components, etc., can solve the problems of affecting the accuracy of the focusing value, increasing the proportion of the background image, and the target object is easy to deviate from the window, etc. Achieve the effect of improving accuracy and improving user experience

Active Publication Date: 2019-08-16
NUBIA TECHNOLOGY CO LTD
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Problems solved by technology

[0009] However, in the above-mentioned focusing process, if the focus window is too large, the proportion of the background image in the focus window will increase, which will affect the accuracy of the focus value; if the focus window is too small, the target object (the object to be focused) will easily deviate from the window, and will Affects the accuracy of the focus value

Method used

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  • A mobile terminal and method for acquiring focus value
  • A mobile terminal and method for acquiring focus value
  • A mobile terminal and method for acquiring focus value

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Embodiment Construction

[0058] The technical solution of the present invention will be described in more detail below with reference to the drawings and embodiments.

[0059] A mobile terminal implementing various embodiments of the present application will now be described with reference to the accompanying drawings. In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, "module" and "component" may be used mixedly.

[0060] Mobile terminals may be implemented in various forms. For example, terminals described in the present invention may include devices such as mobile phones, smart phones, notebook computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Tablet Computers), PMPs (Portable Multimedia Players), navigation devices, etc. mobile terminals and fixed terminals such as digital TVs, desktop computers, etc. ...

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Abstract

This paper discloses a mobile terminal and a method for obtaining a focus value, the method comprising: the mobile terminal obtains the brightness value of each pixel contained in the focus window in the current frame image; and filters the obtained brightness value of each pixel to obtain the filtered value of the brightness value of each pixel; determine the corresponding weight value of each pixel; calculate the current The focus value of the frame image. The embodiment of the present invention improves the accuracy of focusing and improves user experience.

Description

technical field [0001] Embodiments of the present invention relate to but are not limited to smart terminal technology, especially a mobile terminal and a method for acquiring a focus value. Background technique [0002] In a mobile terminal that supports autofocus, the process of finding out the image distance corresponding to the clearest image is called focusing. Wherein, the focusing process includes the following steps: [0003] First, obtain the brightness value of each pixel contained in the focus window in the current frame image; [0004] Secondly, the obtained luminance value of each pixel is filtered to obtain a filtered value of the luminance value of each pixel; [0005] Next, calculate the focus value (FV, Focus Value) (or called contrast value) of the current frame image according to formula (1) and record the current lens position corresponding to FV: [0006] [0007] Wherein, FV represents the focus value of the current frame image; Q(i) represents th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/725H04N5/232
CPCH04M2250/12H04M2250/52H04M1/72403H04N23/67G03B13/36H04M1/725
Inventor 姬向东付一鹏
Owner NUBIA TECHNOLOGY CO LTD
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