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Automatic focusing method and device

An autofocus and lens technology, applied in the direction of focusing devices, installations, instruments, etc., can solve the problem of increased distance

Inactive Publication Date: 2013-04-03
MSTAR SOFTWARE R&D (SHENZHEN) LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the distance between the lights irradiated on the two-wire type sensors 252, 255 will become larger

Method used

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  • Automatic focusing method and device

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Embodiment Construction

[0080] The present invention uses a camera to generate two images, uses the two images to generate three-dimensional depth, and determines the distance between the object and the lens according to the three-dimensional depth, and moves the lens accordingly to achieve the purpose of automatic focusing. Three-dimensional depth will be introduced first.

[0081] Generally speaking, the human brain uses the images seen by the left eye and the right eye to create a three-dimensional visual effect. That is to say, when the left eye and the right eye see the same object, the images presented by the left eye and the right eye will be slightly different, and the human brain creates a three-dimensional image based on the images seen by the two eyes. Please refer to Figure 5a And Section 5b, which is a schematic diagram of the imaging of individual eyes when viewing objects with both eyes.

[0082] When an object is at position I very close to the center of the eyes, the object seen b...

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Abstract

The invention provides an automatic focusing device. The automatic focusing device comprises a first lens, a first light sensitive unit, a second lens, a second light sensitive unit, an image processing circuit and a focusing processor, wherein the first light sensitive unit is used for receiving an image formed after an object passes through the first lens, the second light sensitive unit is used for receiving an image formed after the object passes through the second lens, the image processing circuit is used for receiving a first image generated by a first light sensitive signal and a second image generated by a second light sensitive signal, and the focusing processor is used for working out a three-dimensional depth according to the first image and the second image, and accordingly the first lens and the second lens are moved.

Description

technical field [0001] The present invention relates to an automatic focusing method and device, and in particular to an automatic focusing method and device applied to a video camera. Background technique [0002] Generally speaking, the auto focus function is one of the important indicators of today's cameras. Through the auto-focus function, camera users can quickly find the focal length of the lens group, improve the success rate of shooting results, and improve image quality. Furthermore, the autofocus function can also correctly track fast-moving objects, making it easy to get started with camera technology. Wherein the camera can be a digital camera or a digital video camera. [0003] As we all know, the basic operation of the auto-focus function is that the object automatically controls the movement of the lens group through the camera system, so that the image of the object is clearly imaged on the photosensitive unit. Please refer to Figure 1a and Figure 1b ,...

Claims

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Application Information

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IPC IPC(8): G03B13/36G02B7/36H04N5/232
Inventor 郑昆楠
Owner MSTAR SOFTWARE R&D (SHENZHEN) LTD
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