Display Control Device for Uniform Zoom Magnification
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Solution Overview
Problem
Operators face difficulties in uniformly controlling zoom magnifications across multiple PTZ cameras of different models, leading to inconsistent image quality and operator discomfort during simultaneous image display.
Innovation Solution
A display control device and system that includes an operation unit and a control amount converter to standardize the zoom magnification control signals for each camera, ensuring uniform operation and image quality through a W/T pulse conversion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PTZ cameras of different models are used to take images simultaneously, then the coverage and versatility of the system is improved, but the uniformity of zoom magnification control and image quality deteriorates
Solution Approach 1:
The patent applies parameter changes by converting control amounts based on camera-specific parameters. The control amount converter changes the control signal parameters according to the relationship between operation amounts and zoom magnification changes for each camera model, ensuring uniform zoom control across different camera models despite their inherent parameter differences
Solution Approach 2:
The control amount converter acts as an intermediary between the operation unit and the cameras. It receives uniform operation inputs and transforms them into camera-specific control signals, mediating the difference between the operator's uniform control intent and the diverse camera responses
2Measurement precision
If exclusive operation elements are used for each camera, then the precision of individual camera control is improved, but the ease of operation and operator consistency deteriorates
Solution Approach 1:
The operation unit provides universal operation elements that can control multiple cameras with different models. The control amount converter enables these universal operation elements to function effectively across different camera types by adapting the control signals, making the operation interface multi-functional and model-agnostic
3Manufacturing precision
If shading correction is applied to each camera, then the image quality of individual cameras is improved, but the consistency of image quality across different camera models deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting control amounts based on camera-specific characteristics. The control amount converter modifies the control signals according to each camera's relationship between operation amounts and zoom magnification changes, ensuring that parameter adjustments compensate for model-specific variations
Data Source
AI summary
A display control device for controlling displaying of images taken by a plurality of cameras each having a function of changing a zoom magnification includes: an operation unit including an operation element provided for each of the cameras to accept an operator's operation of setting the zoom magnification of the cameras, the operation unit being configured to output a input pulse signal corresponding to an operation amount of the operation element; and a W/T pulse convertor configured to convert the input pulse signal to a reference pulse signal that is uniformized variations in the zoom magnification of respective cameras with respect to a predetermined operation amount of the operation element, and output the second control signal to a corresponding camera.