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Calculation method and device for auto-focus statistical information

A statistical information and auto-focusing technology, applied in the field of image processing, can solve the problems of low focusing speed and focusing accuracy of camera equipment, inaccurate auto-focusing statistical information, etc.

Active Publication Date: 2019-09-17
BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the autofocus statistical information of the subject obtained by the above method is inaccurate, resulting in low focusing speed and focusing accuracy of the imaging device.

Method used

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  • Calculation method and device for auto-focus statistical information
  • Calculation method and device for auto-focus statistical information
  • Calculation method and device for auto-focus statistical information

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Embodiment Construction

[0107] Auto Focus (Auto Focus) utilizes the principle of light reflection of the subject. The light reflected by the subject is received by the image sensor (such as CCD / CMOS sensor) of the camera and other imaging equipment, and the automatic focus of the subject is calculated through computer processing. focusing statistical information, driving the electric focusing device to focus according to the automatic focusing statistical information. Therefore, the accuracy of the auto-focus statistical information directly affects the focusing speed and accuracy of the camera device.

[0108] Currently, by multiplying the subject with the Scharr operator, the autofocus statistical information of the subject is calculated.

[0109] However, the autofocus statistical information of the subject obtained by the above method is inaccurate, resulting in low focusing speed and focusing accuracy of the imaging device.

[0110] In order to solve the above-mentioned problems, the embodiment...

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Abstract

A method and device for calculating auto-focus statistical information, the method comprising: obtaining an image block with a pixel to be processed as a central pixel as a first image block, the first image block being selected from a photographed image, An image block to extract auto-focus statistical information; according to the color of the center pixel of the first image block, a sub-image of a preset size can be formed in the same channel as the center pixel and within the range of the first image block The pixel of the block is the center, and a preset number of sub-image blocks is selected to form a second image block; according to the pixel value difference information between the sub-image blocks in the second image block, it is judged that the first image block contains strong edge; according to the strong edge contained in the first image block, the corresponding operator matrix is ​​used to calculate the autofocus statistical information of the first image block, and the above scheme can improve the autofocus statistics of the subject Accuracy of Information.

Description

technical field [0001] The present invention relates to the field of image processing, in particular to a calculation method and device for automatic focusing statistical information. Background technique [0002] Camera devices, such as cameras and mobile phones with integrated cameras, are usually capable of autofocus. [0003] Auto Focus (Auto Focus) utilizes the principle of light reflection of the subject. The light reflected by the subject is received by the image sensor (such as CCD / CMOS sensor) of the camera and other imaging equipment, and the automatic focus of the subject is calculated through computer processing. focusing statistical information, driving the electric focusing device to focus according to the automatic focusing statistical information. Therefore, the accuracy of the auto-focus statistical information directly affects the focusing speed and accuracy of the camera device. [0004] Currently, by multiplying the subject with the Scharr operator, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232H04N5/217G06T7/13
CPCH04N23/81H04N23/67
Inventor 胡毅蔡进王浩
Owner BEIJING SPREADTRUM HI TECH COMM TECH CO LTD
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