A camera ranging method

Abstract

The present invention discloses a camera ranging method. The camera ranging method mainly includes: 1. Code word value - object distance table calibration, which refers to the calibration of three groups of different postures (horizontal, overlooking and looking up) according to needs. Codeword value (input parameters of the lens driver unit)-object distance table; 2. For the target object, perform autofocus to obtain the current lens driver unit codeword value; 3. Obtain the pitch angle measured by the gyroscope unit; 4. Combine Lens driver unit code word value, pitch angle and code word value-object distance table, calculate the actual distance to the target object. This method can be compatible with a variety of smart devices, such as smart phones, tablet computers, etc.; in addition, the introduction of the gyroscope unit solves the problem of different measurement values ​​caused by different measurement attitudes, making the results more accurate.

Description

technical field [0001] The invention relates to the field of electronic information systems, in particular to a camera ranging method. Background technique [0002] Judging the distance between the current position and the target object is a requirement that is often encountered in daily life. Common handheld ranging devices are generally equipped with a signal transmitting device and a receiving device, which measure the interval between the signal transmitting time and the reflected signal receiving time. Estimate the distance between it and the target object. The common signals are ultrasonic, infrared, laser, etc. At present, this kind of handheld device is generally used in professional fields, and its cost is high, so it is difficult to promote it in daily life. [0003] With the popularization of smart devices such as smartphones and tablet computers, it is more and more convenient for people to obtain information, and the functions of smart devices such as mobile pho...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of inaccurate estimation of optical parameters in the current monocular camera distance measurement, and the measurement result is greatly affected by the measurement attitude, the present invention proposes a camera distance measurement method, which is different from other monocular camera distance measurement systems. It does not need to accurately know the specific parameters of the camera lens, but only needs to obtain three sets of codeword values ​​(input parameters of the lens driver unit)-object distance table under three different attitudes (horizontal, overlooking and looking up) through calibration. When measuring, The actual distance to the target object can be calculated by combining the code word value of the lens driver after successful focusing and the pitch angle measured by the gyroscope; at the same time, this method introduces the gyroscope unit, and solves the problem when measuring by introducing the calculation of the pitch angle. Different postures lead to different measurement values, making the results more accurate

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