Video Generation Device Shadow Illusion Floating Region
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Solution Overview
Problem
Current techniques lack a simple and economical method to automatically generate a video of a shadow that creates the illusion of a region within a real object floating above a background with changing apparent height over time, requiring advanced knowledge and specialized software for computer graphics.
Innovation Solution
A simple image processing technique that involves inputting a dark region image and control information to generate a shadow region through mask processing, which is then superimposed onto a real object to create the illusion of the target region floating above the background with changing apparent height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vertical projection method is used to change only shadow position without changing object size, then illusion of different depth is achieved, but implementation requires specialized computer graphics software and advanced knowledge
Solution Approach 1:
The patent creates a shadow image as a copy of the original object image, then processes this copy through simple image processing techniques (thresholding, morphological operations, displacement) to generate the shadow effect. This avoids the need for specialized computer graphics software by working with image data directly.
Solution Approach 2:
The patent replaces complex computer graphics projection mechanisms with simple image processing operations. Instead of using 3D modeling and vertical projection methods requiring specialized software, the invention uses 2D image manipulation techniques that can be implemented with general-purpose image processing tools.
2Measurement precision
If three-dimensional information conversion is performed to add shadow to real object, then accurate shadow positioning is achieved, but processing time becomes very long
Solution Approach 1:
The patent creates a shadow image as a copy of the original object image, then processes this copy through simple image processing techniques (thresholding, morphological operations, displacement) to generate the shadow effect. This avoids the need for specialized computer graphics software by working with image data directly.
Solution Approach 2:
The patent performs thresholding and morphological operations on the shadow image in advance to create a clean shadow mask before displacement. This preliminary processing ensures accurate shadow positioning while keeping the overall computation simple and fast, avoiding the need for time-consuming 3D information conversion.
3Productivity
If simple image processing technique is used to add shadow to real object, then processing time is reduced, but ability to create illusion of changing apparent height is limited
Solution Approach 1:
The patent applies dynamic displacement to the shadow image based on control information, allowing the shadow position to change over time. This creates the illusion of changing apparent height by moving the shadow relative to the object in a controlled manner, maintaining both processing efficiency and illusion effectiveness.
Solution Approach 2:
The patent creates a shadow image as a copy of the original object image, then processes this copy through simple image processing techniques (thresholding, morphological operations, displacement) to generate the shadow effect. This avoids the need for specialized computer graphics software by working with image data directly.
4Illumination intensity
If mask processing is performed to replace pixels in shadow region, then shadow brightness control is achieved, but processing complexity increases
Solution Approach 1:
The patent creates a shadow image as a copy of the original object image, then processes this copy through simple image processing techniques (thresholding, morphological operations, displacement) to generate the shadow effect. This avoids the need for specialized computer graphics software by working with image data directly.
Solution Approach 2:
The patent combines multiple image processing operations (thresholding, morphological operations, displacement, and pixel replacement) into a unified shadow generation process. By merging these steps into a single workflow operating on the shadow image copy, the patent maintains processing efficiency while achieving precise shadow brightness control.
Data Source
AI summary
A video of a shadow is automatically generated to create an illusion that a region included in a real object floats above a background and an apparent height of the region with respect to a background region changes with time. A video generation device receives input of a dark region image including a dark region that is a spatial region corresponding to a target object and is darker than a background, and control information for specifying a motion to be given to the dark region, and obtains and outputs a video including a shadow region is obtained and output. The shadow region is obtained by performing mask processing on a motion region obtained by giving the motion to the dark region according to the control information. The mask processing replaces pixels of a mask region at a spatial position corresponding to the target object with pixels brighter than the motion region. Superimposing an output video corresponding to this video on a real object causes an observer, who views the real object on which the output video is superimposed, to have an illusion that a target region included in the real object corresponding to the target object floats above a background region and an apparent height of the target region with respect to the background region changes with time.