Camera Control Apparatus for Centering Objects in PTZ Frames
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Solution Overview
Problem
Pan-tilt-zoom (PTZ) cameras experience a delay in tracking objects, causing them to move away from the image center, leading to inefficient object positioning within the camera frame.
Innovation Solution
A camera control apparatus that includes a processor to detect objects within the image and generate control values to adjust the camera's capturing area, ensuring the object is positioned at the image center by calculating and applying appropriate control accelerations based on the object's movement and zoom magnification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the PTZ camera executes pan, tilt, zoom, or focus functions after capturing the camera image to track or precisely capture the object, then the object can be tracked or captured, but a delay phenomenon occurs causing the object to be positioned away from the center of the camera image
Solution Approach 1:
The patent applies preliminary action by predicting the object's future position and pre-adjusting the camera's pan, tilt, zoom, and focus parameters before the object actually moves to that position. The processor calculates predicted camera parameters based on the object's current position and movement trend, then proactively adjusts the camera to those parameters in advance, eliminating the traditional delay where the camera reacts after the object has already moved away from the center.
2Measurement precision
If the camera adjusts capturing area to position the object at the center, then the object positioning accuracy improves, but the camera may experience inertia and screen vibrations
Solution Approach 1:
The patent applies dynamics by making the camera adjustment process adaptive and variable rather than fixed. The processor dynamically calculates adjustment parameters based on real-time object position and velocity, and the camera drive controller adjusts the capturing area with variable speed and acceleration. This dynamic approach allows the system to smooth out abrupt movements, reducing inertia and screen vibrations while still achieving accurate object positioning at the center.
3Adaptability or versatility
If the camera uses fixed capturing area settings, then the device complexity is reduced, but the camera cannot adapt to objects at different distances or zoom magnifications
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the camera's capturing area parameters (pan, tilt, zoom, focus) based on the object's position and distance. The processor calculates appropriate camera parameters for each frame, and the camera drive controller modifies the capturing area settings in real-time. This allows the camera to adapt to objects at various distances and zoom levels without requiring complex manual intervention or fixed settings.
Data Source
AI summary
A camera control apparatus is provided. The camera control apparatus includes: a processor configured to detect a partial image including an object from a first image of a camera, generate a control value for controlling a camera capturing area to position a specific point of the object corresponding to specific coordinates of the partial image on center coordinates of a second image of the camera which is captured by the camera subsequent to the first image based on center coordinates of the partial image and center coordinates of the first image; and a camera drive controller configured to change the camera capturing area based on the control value output from the processor.