Imaging Control Device Zoom Restriction for Subject Visibility
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Solution Overview
Problem
Conventional network camera systems face issues where zooming in on a specified region may result in the subject being partially or entirely cut out of the display screen due to physical restrictions in the camera's image capturing direction, leading to misalignment between the camera's center and the user-selected region.
Innovation Solution
A control device that determines the image capturing direction and zoom magnification for a specified imaging region, and if the camera's direction is out of range, restricts the zoom magnification to a lower value to ensure the subject remains visible on the screen, even if the camera's center cannot align with the user-selected region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the zoom value is increased to magnify the user specified region, then the display magnification is improved, but the subject may be cut out of the display screen when the image capturing direction cannot be adjusted to align with the selected region
Solution Approach 1:
The system performs preliminary alignment of the image capturing direction with the center of the user-specified region before executing the zoom operation. By pre-adjusting the capture direction to match the selection center, the system ensures that the subject remains centered and visible during magnification, preventing the subject from being cut out of the display screen.
2Measurement precision
If the image capturing direction is changed to align with the user selected region, then the alignment accuracy is improved, but the adjustment range is limited by physical restrictions of the camera mechanism
Solution Approach 1:
When the camera's image capturing direction cannot be adjusted to align with the user-selected region due to physical mechanism restrictions, the system changes the zoom magnification parameter to a lower value. This parameter substitution allows the system to maintain subject visibility by compensating for the misalignment through reduced magnification, rather than requiring impossible mechanical adjustment.
3Measurement precision
If the zoom value is determined based on the dimension ratio between the display region and the user selected region, then the zoom precision is improved, but the subject may not be displayed on the screen when the center of the selected region does not coincide with the center of the captured image
Solution Approach 1:
The system performs preliminary alignment of the image capturing direction with the center of the user-specified region before calculating and applying the zoom magnification. This pre-alignment ensures that when the zoom operation is executed with precise magnification based on dimension ratios, the subject remains properly positioned and fully visible on the display screen.
Data Source
AI summary
On a display screen of a display unit which displays an image captured by an imaging unit, the image capturing direction and the zoom magnification for a specified imaging region to be captured by the imaging unit are determined. If the determined image capturing direction is out of a range of the image capturing direction of the imaging unit that can be changed, the zoom magnification of the imaging unit is restricted to be lower than the zoom magnification determined in the determination.