Digital camera device with self-focusing system and method thereof

A technology of auto-focus and digital photography, which is applied in the direction of focusing device, optics, camera, etc., can solve the problems of complex mechanical structure of the camera device, insufficient ability of quick response, increased volume of the camera device, etc., so as to avoid image shooting deviation and change Uniform, uniform radius of curvature effect

Inactive Publication Date: 2004-07-07
VIMICRO CORP
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Problems solved by technology

Its feature is that it has the advantages of correct long-distance focus and no parallax in focus. The disadvantage is that it cannot work normally when the light is too dark and the contrast of the object is low.
[0006] However, the method of changing the focus position of the imaging device by changing the position of the focusing lens through a mechanical transmission device has a defect in that due to the limitation of the precision of the mechanical transmission device during work, the loss of function will occur during the shooting process, making the work The efficiency is reduced, and the ability of quick response is insufficient; at the same time, the mechanical structure inside the camera device is

Method used

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  • Digital camera device with self-focusing system and method thereof
  • Digital camera device with self-focusing system and method thereof
  • Digital camera device with self-focusing system and method thereof

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[0037] specific implementation

[0038] In the following description, well-known functions or structures will not be described in detail to avoid unnecessary confusion with the content of the present invention.

[0039] The digital camera device and method with autofocus system disclosed by the present invention can be completed by the following devices and steps:

[0040]In the process of shooting the scene, the image to be taken is captured by the image sensor 1 at the beginning of the image, and the image is converted into electric charge by the A / D digital conversion circuit 8, and then enters the image processing unit 7, and is processed by the image The autofocus algorithm module AF 3 in the processing unit performs calculations and judges the sharpness of the image, and the microcontroller MCU 4 outputs a PWM pulse width modulation signal 5 according to the processing result of the image processing unit 7, thereby further generating a signal cont...

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Abstract

A digital camera shooting device consists of a main controller unit an image transducer, an image processing unit, a storage unit, a keyboard unit and output interface, a lens unit and automatic focusing circuit and a microprocessor. In addition, the present invention discloses also an automatic focusing method by using electric voltage to regulate focal length.

Description

field of invention [0001] The invention relates to a digital camera device, in particular to a digital camera device with an automatic focus system and an automatic focus method. Background technique [0002] In the existing camera technology, an automatic focus system is usually used. During the shooting process of the image, the distance between the camera device and the object is often changed, so the image is often blurred due to exceeding the depth of field range. In order to keep the image clear, it is necessary to change the focus position of the lens during the viewfinder process to keep the image clear. This process of adjusting the focus position is called focusing or focusing. [0003] Autofocus technology has been widely used in imaging fields such as cameras, video cameras, and image scanning. It enables the imaging system to automatically adjust the position of the focusing lens group in the lens according to the distance of the objec...

Claims

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Application Information

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IPC IPC(8): G03B13/36G03B30/00
Inventor 张辉俞青
Owner VIMICRO CORP
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