Projection Device Drawing Separation for Synchronized Image Sharing
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Solution Overview
Problem
Existing technologies face challenges in sharing a projection image with overlaid handwritten characters or drawings seamlessly across multiple devices.
Innovation Solution
A projection device equipped with an image-capturing unit and communication capabilities allows for capturing and transmitting images to an information processing device, enabling the projection of received drawing images while avoiding the projection of captured images, facilitating synchronized image and drawing sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the projection device projects both captured images and drawing images simultaneously, then complete information is displayed, but image confusion and lack of clarity occur
Solution Approach 1:
The patent extracts the drawing image data from the composite captured image data, separating it into a distinct projection stream. The control unit identifies drawing portions in the captured image and extracts their position and shape information, then projects these extracted drawing images separately from the original captured images, thereby preventing image confusion while preserving complete information.
Solution Approach 2:
The patent segments the projection content into distinct types: captured images and drawing images. The control unit divides the projection data by identifying drawing portions within captured images, separating them into different projection streams that are displayed at different timings or locations, thus avoiding overlap and confusion.
2Adaptability or versatility
If handwritten characters are overlaid on projected images for annotation, then collaboration is enabled, but sharing across multiple devices becomes difficult
Solution Approach 1:
The patent creates a copy of the drawing image data extracted from the captured image and transmits this copy to external information processing devices through communication units. This allows the annotated information to be shared across multiple devices without requiring physical presence, enabling remote collaboration while preserving the annotation data.
Solution Approach 2:
The patent introduces a communication unit as an intermediary that transfers drawing image data between the projection device and external information processing devices. This mediator enables the shared viewing and annotation of projection content across different devices, solving the shareability problem while maintaining collaboration capabilities.
3Speed
If the projection device captures and projects images continuously, then real-time feedback is achieved, but synchronization with external devices becomes complex
Solution Approach 1:
The patent extracts only the necessary drawing image data from the continuous captured image stream, rather than transmitting or synchronizing the entire captured image sequence. By extracting and transmitting only the annotation portions to external devices, the synchronization complexity is significantly reduced while maintaining real-time feedback capabilities.
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
Enables seamless sharing and synchronization of projection images and handwritten inputs across devices, enhancing collaboration and correction processes, such as in distance education scenarios.
Implementation Method 1
a projection optical system configured to project the image light formed by the image light forming unit toward the projection target
Implementation Method 2
the image-capturing unit includes an imaging element configured to receive light through the projection optical system
Data Source
AI summary
A projection device includes: a projection unit configured to project image light to a projection target; an image-capturing unit configured to capture an image of a range including the projection target to generate a captured image; a communication unit; and a control unit configured to transmit the captured image to an information processing device by the communication unit and cause a reception image received by the communication unit from the information processing device to be projected by the projection unit. The projection unit includes an image light forming unit configured to form image light and a projection optical system configured to project the image light formed by the image light forming unit toward the projection target. The image-capturing unit includes an imaging element configured to receive light through the projection optical system.