CCTV Camera Dynamic Scan Mode Switching
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Solution Overview
Problem
Interlaced scan methods in cameras result in image noise when photographing moving objects due to the combination of images captured at different times, and progressive scan generates fewer frames per second, making it difficult to capture fast-moving objects effectively.
Innovation Solution
A camera system that includes a progressive CCD, a signal processor, and a controller to adjust photographing time and mode based on object information, allowing for synchronization operations to improve image quality by switching between interlaced and progressive scans as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If interlaced scan is used to photograph moving objects, then image capture frequency is improved, but image quality deteriorates due to noise in contours
Solution Approach 1:
The patent dynamically switches between interlaced scan and progressive scan modes based on the movement characteristics of the photographed object. When an object is detected to be moving at high speed, the system transitions from interlaced scan to progressive scan to eliminate contour noise, while maintaining high frame rates through optimized synchronization timing.
Solution Approach 2:
The patent changes the scanning parameter from interlaced to progressive scan mode based on object movement detection. This parameter change allows the system to adapt to different shooting scenarios, using progressive scan for fast-moving objects to avoid contour artifacts while maintaining acceptable frame rates.
2Manufacturing precision
If progressive scan is used to photograph fast-moving objects, then image quality is improved, but frame rate decreases making it difficult to capture specific portions
Solution Approach 1:
The patent performs preliminary detection of object movement characteristics before selecting the scanning mode. By detecting whether an object is moving at high speed in advance, the system can proactively switch to progressive scan mode to ensure clear capture of fast-moving objects, preventing contour noise before it occurs.
Solution Approach 2:
The patent uses feedback from object movement detection to control the scanning mode selection. The system continuously monitors object movement and adjusts the scan mode accordingly, creating a closed-loop control system that optimizes image quality for fast-moving objects while managing frame rate implications.
3Productivity
If interlaced scan is used, then frame rate is improved, but synchronization accuracy deteriorates for fast-moving objects
Solution Approach 1:
The patent dynamically adjusts synchronization timing based on the selected scan mode and object movement characteristics. When progressive scan is selected for fast-moving objects, the system modifies the synchronization interval and timing to ensure accurate capture of specific portions of the object, thereby improving synchronization accuracy while maintaining adequate frame rates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The camera system effectively reduces image noise and improves the capture of fast-moving objects by adjusting photographing time and mode, enhancing image quality and synchronization with the object's movement.
Implementation Method 1
a progressive charge coupled device (CCD) for progressively outputting a photographed image signal
Data Source
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Figure 3A~3F
AI summary
A closed circuit television (CCTV) camera includes an image pickup unit to receive an image based on an object, convert the image to an electric signal, and output the electric signal, and a controller to adjust a photographing time or a photographing mode of the CCTV camera based on information of the object derived from the electric signal and pre-set condition information.