Camera Illumination System for Dynamic Shadow Projection
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Solution Overview
Problem
Existing illumination systems using image data from cameras for projection often fail to maintain a desired image due to temporal changes in the subject, leading to unnatural and distorted projections.
Innovation Solution
A camera system that acquires and processes photographing information, including time and environmental data, to calculate optimal photographing conditions and control the photographing area, ensuring that the projected image remains consistent in size and shape with the actual object, and transmits this data to an external projection device for natural illumination presentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an image photographed by a camera is used as illumination light, then the illumination presentation becomes more dynamic and interesting, but the position and size of the shadow changes temporally causing the desired image to be lost
Solution Approach 1:
The system pre-calculates and stores the relationship between shadow position and camera positioning information before actual projection. When projection is needed, the camera is automatically positioned based on pre-stored data, eliminating the need for real-time adjustment and ensuring consistent image quality despite temporal changes in shadow positions
Solution Approach 2:
The system uses feedback from stored position information and sunlight angle data to automatically adjust camera positioning. The camera controller references pre-stored correspondence data to determine the optimal camera position that will capture the desired shadow image, creating a closed-loop control system that maintains image consistency
2Ease of operation
If a projector and camera are connected via the Internet to enable remote illumination performance, then accessibility and remote operation are improved, but the temporal changes in shadow position cause distortion and unnatural appearance
Solution Approach 1:
The system pre-stores the correspondence between shadow positions and camera positioning information in a database accessible via the Internet. This allows remote users to access and operate the system without needing to understand the complex real-time adjustments required, while the pre-stored data ensures accurate camera positioning for natural-looking projections
Solution Approach 2:
The system introduces an intermediary database that stores the relationship between shadow positions and camera positioning information. This intermediary layer allows remote users to operate the system via the Internet while the system automatically translates user requests into precise camera positioning based on pre-stored correspondence data, maintaining projection accuracy despite remote operation
3Area of stationary object
If the camera photographs a shadow that is smaller than the actual object, then the projection becomes more compact, but the user feels strange due to lack of reality
Solution Approach 1:
The system uses feedback from pre-stored position information to automatically adjust camera positioning and photographing conditions. By referencing the stored correspondence data, the system determines the optimal camera position that captures shadows at natural sizes, ensuring the projected images maintain realism and do not appear distorted or unnatural to users
Data Source
AI summary
A camera includes a data acquisition unit, a photographing area control unit, a photographing unit and a communication unit. The data acquisition unit acquires, as photographing information, at least one of time information, information on a position of the sun, information on an angle between a sunlight and a ground, and projection information of an external projection device. The photographing condition calculation unit calculates a photographing condition based on the photographing information. The photographing area control unit controls a photographing area based on the photographing condition. The photographing unit generates an image data by photographing the photographing area. The communication unit transmits the image data to the external projection device.