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A point selection method, device and storage medium for zoom follow curve

A zoom-following and zoom-point technology, which is applied in the field of curve correction and can solve the problem that key points are not given.

Active Publication Date: 2020-06-23
ZHEJIANG DAHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, the selected key points do not give specific numerical standards, and it seems that it is more of an output of human eye observation work, which is prone to produce many unnecessary correction points

Method used

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  • A point selection method, device and storage medium for zoom follow curve
  • A point selection method, device and storage medium for zoom follow curve
  • A point selection method, device and storage medium for zoom follow curve

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Embodiment Construction

[0148] In order to ensure that the selected calibration points are more concise under the condition of accurate point selection, and are applicable to multiple devices to be calibrated, the embodiments of the present application provide a method, device, and storage medium for selecting points for a zoom follow curve. In order to better understand the technical solution provided by the embodiment of the present application, here is a brief description of the basic principle of the solution:

[0149]The infinity theoretical curves of multiple selected devices to be calibrated are used as the calibrated object distance. Firstly, the theoretical curve of each device to be calibrated is overall shifted, and a plurality of first designated zoom points are selected on the theoretical curve after the overall shift, and curve fitting is performed according to the plurality of first designated zoom points to obtain the first curve and get the tolerance range of the first curve. Second...

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Abstract

This application discloses a method, device and storage medium for zoom following the curve.Involved in the field of curve correction, it is used to solve the problem of many unnecessary correction points in the process of selection.In this method, first of all, the theoretical curve of multiple corrected devices is shifted, and multiple first -specified zoom points are selected according to the theoretical curve after the overall offset, andThe tolerance range of the first curve and obtaining the first curve is obtained.Secondly, select multiple key zoom points through the first specified variation point, so that multiple key variation focus is used to perform the second curve that is obtained by the curve.If the distance between the actual point pair of the first specified variation point in the first curve and the second curve is not greater than the range of the tolerance, the correction zoom point is determined.In this way, the selected correction points can be more streamlined and suitable for multiple correction equipment.

Description

technical field [0001] The present application relates to the field of curve correction, and in particular to a point selection method, device and storage medium for a zoom follow curve. Background technique [0002] Taking the movement with zoom focus function in the security industry as an example, the movement lens manufacturer will provide some typical object distances of the lens (typically, 8 typical object distances such as 10cm, 1m, 2m, 3m, 5m, 10m, 50m, infinity, etc. Object distance) zoom follows the theoretical curve. Considering individual differences, the theoretical curve cannot be used as the actual use curve for all such lenses. In order to reduce the focus search range, achieve the purpose of small focus range and fast speed, or have a good follow-up effect on the specified object distance, etc., it is necessary to correct the zoom tracking curve of the movement equipment to match individual differences; or, when positioning When there is a problem with the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00H04N5/232
CPCH04N17/002H04N23/67H04N23/675
Inventor 虞卫勇陈天钧陈明珠郑佳枫
Owner ZHEJIANG DAHUA TECH CO LTD