Auxiliary positioning method for acquiring sharp images

Abstract

The invention relates to an assisted positioning method for acquiring clear images. The method solves the problems of positioning technique for acquiring the clear images, and is particularly applicable to solving the positioning problem for acquiring the clear images in a human face identifying device. The technical proposal comprises that: a convex mirror is arranged in front of a camera lens; the convex mirror is fixed on the relative position of the camera lens; the convex mirror is provided with a viewing aperture of the camera lens; the axial line of the camera lens coincides with the geometric symmetry center line of the convex mirror; and the camera lens shoots after the relative positions, distances or gestures of the camera lens and the shot object are adjusted according to the size and position of an optical image of the shot object image formed in the convex mirror and whether the optical image is fully imaged in the designed area. The method has the advantages of visual, simple and convenient adjustment and positioning, and low cost, is particularly applicable to the human face identifying device and can greatly reduce the manufacturing cost of the human face identifying device.

Description

[0001] The technical field [0002] The present invention relates to a method for locating a subject and a camera lens for obtaining a clear image and increasing the effective pixels of the image as much as possible, in particular to an image-assisted positioning method suitable for use in face recognition equipment to obtain a clear image of a human face method. Background technique [0003] In the prior art, the positioning method to obtain a clear image and increase the effective pixels of the image as much as possible is to use an external electronic display screen to observe the position and clarity of the subject through the electronic display screen. In the equipment for identifying personal identity through face images , the prior art also adopts the above method. [0004] Face recognition technology is a biometric recognition technology based on computer, image processing, pattern recognition and other technologies. In recent years, countries all over the world have...

AI Technical Summary

Problems solved by technology

However, display screens are expensive and account for a relatively high proportion of the cost of some products

In addition, the display screen has the disadvantages of being easily damaged and sharply reducing the definition under high light conditions, which affects the reliability of the device

Finally, the display takes up a certain amount of space, which is not conducive to the development of more miniaturized devices

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