Method for calculating distance and actuate size of shot object

Abstract

The present invention provides a calculating method for distance between a photographed object and a real scale, which can be applied to a picture searching device. First of all, a relation-corresponded table is established, which is provided with focal step numbers and object distances (the distance between the picture searching device and the photographed object); next, the real scale can be gained by directly looking up the table after focusing. On the condition that the object distance and an image distance are known, an object height (the real scale of the photographed object) can be easily worked out by using a calculating formula ''an object distance / an object height equals to an image distance / an image height''; because the image height of the photographed object can be gained by the size of the corresponded pixel of the picture searching device and calculating.

Description

technical field [0001] The present invention relates to a method for calculating the distance of a photographed object and its actual size, in particular to a method for calculating the distance of a photographed object and its actual size using the relationship table between the number of focusing steps and the object distance and the principle of pinhole imaging. method of size. Background technique [0002] Photography utilizes the principle of pinhole imaging and uses a photosensitive medium to store the image. According to the principle of pinhole imaging, the real scene passes through the lens of the camera and is projected onto the photosensitive medium, such as film, photosensitive coupling device (Charge Coupled Device; CCD) or complementary metal-oxide semiconductor (Complementary Metal-Oxide Semiconductor; CMOS) etc., can record the light of the real scene after shooting, and can be converted into an image recognizable as the real scene through chemical or digita...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for calculating the distance and actual size of the object to be photographed, which is to establish a table of focusing steps and corresponding object distance in the image retrieval device, and the image retrieval device can use the table to calculate the object distance , since the image distance and pixels are the built-in parameter values ​​of the image retrieval device, after the object distance is calculated, the object height can be calculated using the calculation formula of "object distance / object height = image distance / image height", so that Achieve the effect of letting the viewer know the actual size of the object being photographed, thereby solving the problem mentioned in the previous technology that the actual size of the scene being photographed cannot be known from the photo

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