Quick focusing method for digital camera

A technology of digital camera and focusing method, which is applied to the focusing device of the camera, the focusing device of the projector, the camera, etc., can solve the problems of increasing the time of the digital camera, consuming the time of focusing, and the speed of focusing of the digital camera cannot be further shortened, etc., to achieve The effect of reducing the number of exposures

Inactive Publication Date: 2005-09-14
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] It can be known from the above prior art that the stepping motor must drive the optical zoom lens to repeatedly focus, find a view, expose and calculate the resolution, so as to obtain the position of the best resolution, which will greatly increase the digital ca

Method used

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  • Quick focusing method for digital camera
  • Quick focusing method for digital camera
  • Quick focusing method for digital camera

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Embodiment Construction

[0035] See first figure 2 , is a basic structural diagram of a digital camera, in which a small number of framing points can be used to accurately calculate the best focus framing position. The interior of the digital camera 50 includes at least a stepping motor (not shown in the figure), which is used to drive an image capture unit 10 (such as a lens) to telescopically move, so that the image capture unit 10 will focus on the scene obtained after the framing Play it on a display unit 20 .

[0036] During the moving process of the stepping motor, a plurality of viewing points can be set on the moving path according to the setting of the present invention, so as to allow the image capture unit 10 to stop at the viewing points to take a view. If it is illustrated with a stepping motor subdivided into one hundred steps, then ten steps can be regarded as an interval distance, thereby setting ten viewing spots on the moving path.

[0037] Its purpose is mainly to reduce the numb...

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PUM

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Abstract

The invention relates to a digital camera fast focusing method using a step motor to control an image acquisition unit on optimum focusing viewfind position, which comprises following steps: a), setting step motor to control image acquisition unit on viewfind position with at least a first, a second and a third viewfind point; b) viewfinding on viewfind position to calculate resolution ratio and generate at least a first, a second and a third resolution ratio; c) comparing these resolution ratios to determine the region of optimum focusing viewfind position; d) calculating optimum focusing viewfind position according to viewfind position.

Description

technical field [0001] The invention relates to a fast focusing method for a digital camera, in particular to a method that utilizes a small number of viewing spots, but can accurately calculate the best focusing viewing position, thereby reducing the number of exposures and focusing time of the digital camera. Background technique [0002] With the advent of the digital age, coupled with the vigorous development of related software and hardware technologies, various digital devices have begun to gain people's approval and are widely used in daily life. Products such as digital cameras (DC) and digital video cameras (DV) all provide users with a more convenient lifestyle. Therefore, under such a strong market demand, manufacturers are racking their brains to develop new products with ever-changing applications and functions to meet the ever-changing market demand in the market. Therefore, digital devices with various purposes can be so pervasive in people's lives. [0003]...

Claims

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Application Information

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IPC IPC(8): G03B3/02G03B13/36H04N5/225
Inventor 许新烘邱慧娴
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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