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Method for measuring distance between object and shooting camera by utilizing digital camera

A technology of digital cameras and cameras, which is applied to cameras, measuring devices, and optical devices, etc., can solve the problems of difficult operation and complicated calculation, and achieve the effects of easy operation, simple measurement method, and fast evaluation method.

Inactive Publication Date: 2011-11-02
TIANJIN SAMSUNG OPTO ELECTRONICS
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AI Technical Summary

Problems solved by technology

Although the shooting of multi-angle points has high precision and accurate positioning, for some occasions that do not require high-precision distance measurement, there are disadvantages that the operation is not easy to realize and the calculation is relatively complicated.

Method used

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with specific examples.

[0015] According to the imaging principle of the convex lens, when the object forms a clear image, there is

[0016] Where u is the object distance, f is the focal length of the convex lens, and v is the image distance. It can be obtained from the above formula that as long as any two parameters are determined, the other parameter is also determined.

[0017] The lens of a digital camera is composed of multiple groups of lenses. When focusing, by adjusting the different positions of each group of lenses, within the focal length range of the lens, the focused object can form a clear image on the photosensitive element. When the digital camera finishes focusing on an object, the lens barrel stops stretching. At this time, the focal length value of the lens is determined, and the position of the CCD is also determined, so the image distance v at this time can also be determ...

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Abstract

The invention discloses a method for measuring a distance between an object and a shooting camera by utilizing a digital camera, aiming at providing a method which is simple and can be operated easily to measure the distance between the object and the shooting camera in occasions that do not need high-precision distance measurement. The method comprises the following steps: marking all groups of lenses in a digital camera lens as a1, a2, a3 to an, correspondingly marking the nearest distance values between each group of lenses and a photosensitive unit as b1, b2, b3 to bn, and marking distance values between the current position and the photosensitive unit as c1, c2, c3 to cn, and marking obtaining numerical values that respectively correspond to the lens obtained by formulas as d1,d2, d3to dn; connecting the obtained d1,d2,d3 to dn end to end to obtain index values IDJ=d1d2d3 to dn of object distances; building a corresponding relationship between each object value uj in definite state of the lens and the index value ID of the object distance; and reading the corresponding object distance by the index values ID of the object distances.

Description

technical field [0001] The invention relates to a method for measuring the distance between an object and a shooting camera by using a digital camera. Background technique [0002] At present, digital cameras are used to measure objects (that is, to obtain the distance between the object and the camera), generally by taking pictures of the measured object from two or more points in two directions, and then calculate through the obtained photos. Get the measured distance. Although the shooting of multi-angle points has high precision and accurate positioning, for some occasions that do not require high-precision distance measurement, there are disadvantages that the operation is not easy to realize and the calculation is relatively complicated. Contents of the invention [0003] The present invention aims to overcome the deficiencies in the prior art, and provides a method for measuring the distance between an object and a photographing camera using a digital camera, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B13/36G01B11/02
Inventor 王钧剑郑龙周
Owner TIANJIN SAMSUNG OPTO ELECTRONICS
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