Pan Tilt Camera Imaging Control Spherical Projection
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Solution Overview
Problem
Users find it difficult to intuitively understand the viewpoint movement of a pan and tilt camera's imaging unit and the actual subject movement when viewing live images on a portable terminal, as the displayed frames for imaging limits and current ranges do not accurately represent the camera's movements, leading to confusion about the imaging limit field of view, especially with high-speed subject movement.
Innovation Solution
An imaging control device that superimposes live view images on a two-dimensionally displayed spherical surface indicating both the imagable and non-imagable regions, rotating the limit display image according to user input instructions, allowing users to recognize the camera's rotation limits and actual subject movement by displaying the live view image within the limit display image, even when instructions exceed the camera's rotation limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If rectangular frames indicating imaging limit and current range are displayed on portable terminal, then imaging range information is provided to user, but user cannot intuitively understand viewpoint movement and subject movement relationship
Solution Approach 1:
The patent applies spherical projection to transform the three-dimensional spherical image data into a two-dimensional display format. The limit display image is generated by projecting the spherical imaging limit onto a spherical surface, which is then displayed as a curved map-like representation on the portable terminal. This curved representation intuitively shows the relationship between camera viewpoint movement and subject movement, resolving the contradiction by providing both imaging range information and intuitive motion understanding through the spherical geometry visualization.
2Device complexity
If two-dimensional rectangular frames are used to display imaging limits, then display simplicity is maintained, but accuracy of representing camera rotation and subject movement is insufficient
Solution Approach 1:
The patent transitions from conventional two-dimensional rectangular display to a spherical projection display that incorporates curved spatial relationships. The limit display image represents the three-dimensional spherical imaging space projected onto a two-dimensional surface, maintaining display simplicity while accurately representing camera rotation angles and subject movement relationships through the spherical geometry, thus resolving the contradiction between display simplicity and movement representation accuracy.
3Ease of manufacture
If conventional rectangular frame display is used, then implementation is simple, but user recognition of imaging limit field of view is difficult
Solution Approach 1:
The patent employs color differentiation in the limit display image to enhance user recognition of the imaging limit field of view. Different regions of the spherical projection are displayed with distinct color schemes, and the current imaging range is highlighted with specific color markings against the background of the full imaging limit. This color-based visualization makes the imaging limit field of view immediately recognizable to users while maintaining the simplicity of digital display implementation.
Data Source
AI summary
An imaging control device according to an aspect of the present invention includes a rotation instruction input unit that receives an input of an instruction of rotation of a pan and tilt mechanism of a camera, a rotation instruction output unit that outputs the rotation instruction to the camera, an image input unit that receives a live view image according to the rotation instruction from the camera, and a display control unit that causes the display unit to perform a display for superimposing the live view image input from the camera on a limit display image of a two-dimensionally displayed spherical surface indicating an imagable region and a non-imagable region respectively corresponding to within a rotation limit and out of the rotation limit of the imaging unit of the camera, and rotating the limit display image along the two-dimensionally displayed spherical surface according to the input of the rotation instruction.