Electronic imager-based distance measuring method and system

Abstract

The invention discloses an electronic imager-based distance measuring method. The electronic imager-based distance measuring method comprises the following steps: acquiring a target image and the focal length through an electronic imager, and estimating the height dimension of the target according to a preset ratio; displaying a horizontal reticle associated with an electronic compass in an imaging screen of the electronic imager, sequentially moving the horizontal reticle to the highest point and the lowest point of the target image, and recording the angle change amount of the electronic compass when the horizontal reticle is moved from the highest point to the lowest point of the target image; calculating a target distance according to a formula that x is equal to C2*cotalpha, wherein C2 is the height dimension of the target and alpha is the angle change amount of the electronic compass. By the electronic imager-based distance measuring method, distance measuring operation through the electronic imager is simplified, and only through movement of the horizontal reticle and recording of the angle change amount through the electronic compass, the distance measuring operation on thetarget is simply and conveniently achieved, so that a user experience is improved. The invention further discloses an electronic imager-based distance measuring system. The electronic imager-based distance measuring system has the former beneficial effects.

Description

technical field [0001] The invention relates to the technical field of ranging, in particular to a ranging method based on an electronic imager. The invention also relates to a ranging system based on an electronic imager. Background technique [0002] There are many types of electronic imagers, including cameras, video cameras, video recorders, scanners, etc. In some cases, electronic imagers can also be used for ranging. [0003] At present, the existing electronic imaging products can judge the target distance by the number of pixels (px) of the target in the image and the focal length and pixel size of the product. The principle is as follows: figure 1 shown. The ratio of the target height size to the target distance is equal to the ratio of the product of the pixel size and the number of pixels occupied by the target image to the focal length, that is, C 2 / x=p q / C 1 , where C 1 is the focal length, C 2 is the target height, p is the number of pixels occupied by ...

AI Technical Summary

Problems solved by technology

The operation of the entire ranging process is cumbersome, and it is necessary to operate different buttons on the electronic imager multiple times. The user experience is not good, especially when operating at night, the various buttons are not easy to distinguish, and it is easy to cause misuse.

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