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Image definition determination method and device, medium and electronic equipment

A technology of image clarity and determination method, which is applied in the field of image processing and can solve problems such as out-of-focus, quasi-focus falling on the distant view, etc.

Active Publication Date: 2021-08-27
SPREADTRUM SEMICON (NANJING) CO LTD
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Problems solved by technology

[0003] However, the touch focus function is a very practical function, but it also has disadvantages. For example, when shooting a certain scene, due to the depth of field, you touch a nearby object, but the center point of the actual focus area is far away, causing interest The focal plane where the near object is located is out of focus, and the near view may be quasi-focused and finally fall on the distant view instead of the focal plane of the touch area of ​​interest.

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  • Image definition determination method and device, medium and electronic equipment
  • Image definition determination method and device, medium and electronic equipment
  • Image definition determination method and device, medium and electronic equipment

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Embodiment Construction

[0030] With the development of science and technology and the improvement of living standards, people use more and more electronic devices to obtain clear images, and focusing is one of the important prerequisites for successful shooting. Accurate focusing can make the picture clear, otherwise it is easy to appear The problem of blur, otherwise known as "out of focus". The distinguishability of details in a photo is known as sharpness, and the more details that can be discerned in a photo, the clearer the picture will look. In addition to factors such as the quality of the lens and whether the aperture used will produce diffraction effects, the quality of the focus has the greatest impact on the clarity of the photo. The quasi-focus of the focus area determines the position of the focal plane in the shooting scene, and at the same time makes a relatively obvious dividing line between the clear and blurred areas of the photo. At present, the commonly used contrast focusing met...

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Abstract

The invention discloses an image definition determination method and device, a medium and electronic equipment. The method comprises the following steps: displaying a preview picture on a camera preview interface; receiving a touch operation of a user acting on the preview picture; in response to the touch operation, starting to drive a motor to start focusing by taking a touch position of the touch operation as a central point of a focusing area, and obtaining M frames of candidate images in a focusing process; performing the following processing on the candidate image: dividing a touch region taking a touch position of the touch operation as a center in the candidate image into N sub-regions, and calculating a gray value difference value between a gray value of a pixel point of N-1 sub-regions and a gray value of a central pixel point; carrying out weighted summation on the gray value difference value to obtain a definition value of the candidate image; the closer to the center pixel point, the larger the weighted value of the gray value difference value corresponding to the pixel points of the N-1 sub-regions. The method is used for accurately calculating the image definition, so that a quasi-focus point of touch focusing falls into a touch area in which a user is interested.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image definition determination method, device, medium and electronic equipment. Background technique [0002] At present, the focusing method of electronic devices when taking pictures is mainly for the user to manually touch the screen to focus. For example, in the scene of taking pictures, the user touches an area of ​​interest in the preview image to determine the focus subject. [0003] However, the touch focus function is a very practical function, but it also has disadvantages. For example, when shooting a certain scene, due to the depth of field, you touch a nearby object, but the center point of the actual focus area is far away, causing interest The focal plane of the nearby object is out of focus, and the near-view may be quasi-focused and finally fall on the distant view instead of the focal plane of the touch area of ​​interest. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232G06F17/11G06F3/0488G06F3/0484
CPCG06F3/04842G06F3/04845G06F3/0488G06F17/11H04N23/67H04N23/62
Inventor 白春梦胡继瑶郭文彬汪涛魏巍张健
Owner SPREADTRUM SEMICON (NANJING) CO LTD