3D Image Production via Computational Projection and Rotation
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Solution Overview
Problem
Existing methods for producing three-dimensional portrait images for identity documents are costly and require specialized equipment, leading to a decrease in similarity with the original image, making authenticity difficult to establish visually.
Innovation Solution
A method that calculates a three-dimensional primary form from facial points in a two-dimensional image, projects the image onto a projection surface to create rotated images, and applies these images onto a substrate using linear lenses, ensuring the original image is used in the formation of the stereoscopic image, allowing for quick authenticity verification and reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple digital cameras are used to create stereoscopic images from different angles, then the stereoscopic effect at different viewing distances is improved, but the device complexity and production cost increase significantly
Solution Approach 1:
The patent creates virtual copies of the original image at different angles through mathematical projection and rotation operations. Instead of capturing multiple images with multiple cameras, the system generates synthetic views by calculating projected positions of image elements from a single source image, thereby achieving stereoscopic effects without additional physical cameras
Solution Approach 2:
The patent replaces the mechanical system of multiple physical cameras with a computational system. Image processing algorithms perform projection and rotation calculations to generate multiple视角 images from a single captured image, substituting optical-mechanical complexity with digital signal processing
2Ease of manufacture
If rotation images are calculated from a two-dimensional basic image, then the production cost and equipment requirements are reduced, but the similarity with the original image decreases making authenticity verification difficult
Solution Approach 1:
The patent introduces a third dimension through projection operations. By calculating projected positions of image elements along projection lines from the original image plane to a projected plane, the system creates rotated views that maintain geometric relationships with the original, preserving authenticity while enabling cost-effective production
Solution Approach 2:
The patent uses projection lines and projection planes as intermediaries between the original image and the rotated images. These mathematical constructs serve as mediators that transform the original image into multiple perspectives while maintaining verifiable geometric relationships, allowing authenticity verification through the consistent projection geometry
3Reliability
If four or more digital cameras are set up simultaneously for stereoscopic imaging, then the stereoscopic effect at different viewing distances is achieved, but the productivity and production speed decrease
Solution Approach 1:
The patent performs preliminary capture of a single source image that contains all necessary information for generating multiple perspectives. The subsequent projection and rotation operations are computational processes that can be executed rapidly, eliminating the time-consuming coordination required for simultaneous multi-camera capture while maintaining stereoscopic quality
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
This method enables the production of accurate stereoscopic images suitable for identification documents from a single two-dimensional image, reducing production costs and allowing for visual authenticity verification, while maintaining image similarity and quality.
Implementation Method 1
applying, with the imaging device, image intensities and/or colours corresponding to the image values onto a substrate under a pattern of linear lenses
Implementation Method 2
The interlaced images under each lens are mapped by the linear lenses at a predefined viewing distance onto a left or a right eye
Data Source
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Figure 5a~5b
AI summary
This invention relates to a method for producing a three-dimensional image of an object, comprising the steps of providing a first image of an object, supplying image values associated with image elements of the first image to a processing device, calculating in the processing device at least one image constructed from image elements and rotated around a rotation point through a rotation angle, dividing the rotated image into image lines, forming groups of corresponding image lines for at least two images, including the at least one rotated image, supplying the image values associated with image elements located along the image lines for the groups of corresponding image lines to an imaging device, and applying, with the imaging device, imaging intensities and/or colours corresponding to the image values onto a substrate under a pattern of linear lenses, in such a way that the image intensities and/or colours of each group of corresponding image lines are applied under a linear lens associated with the group.