Polarization Filter for Camera-Display Image Analysis
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Solution Overview
Problem
The accuracy of image analysis in systems recognizing products placed on a display screen is compromised due to the display on the screen interfering with the captured image, leading to errors in image processing and increased computational requirements.
Innovation Solution
Incorporating a first polarization filter between the camera lens and the display screen to attenuate light from the display, ensuring that the display information is not mistakenly identified as part of the product, thereby improving image analysis accuracy by maintaining high brightness for the product while reducing the display's visibility in the captured image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the camera captures an image of the product on the display screen, then the product can be recognized by image analysis, but the display on the screen interferes with the captured image and reduces analysis accuracy
Solution Approach 1:
A polarization filter is introduced as an intermediary component between the camera lens and the display screen. The filter selectively transmits light based on polarization orientation, allowing product light to pass through while blocking display screen light. This mediator resolves the contradiction by physically separating the useful signal (product) from the harmful signal (display interference) without requiring changes to the camera or display device.
Solution Approach 2:
The invention changes the optical parameter of light transmission by utilizing polarization characteristics. By orienting the polarization filter at a specific angle (perpendicular to the display screen's polarization), the system transforms the light transmission properties to differentiate between product reflection and display emission. This parameter change enables the camera to capture product images without display interference, improving image analysis accuracy.
2Loss of information
If the display shows information on the screen, then the information is visible to users, but the display brightness interferes with the camera's ability to capture the product clearly
Solution Approach 1:
The polarization filter serves as a selective intermediary that allows display information to remain visible to users while blocking its light from reaching the camera. The filter is positioned to affect only the camera's light path, preserving display functionality for human viewers while eliminating interference for the imaging system.
Solution Approach 2:
The polarization filter applies selective light transmission properties to different spatial regions. In the direction of the camera lens, the filter blocks display light while transmitting product light. In other directions (toward users), the display remains fully visible. This local differentiation of light transmission quality resolves the contradiction between display visibility and camera capture 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 configuration enhances the accuracy of image analysis by distinguishing the product from the display, reducing errors and computational complexity, and allowing for efficient preprocessing to remove the display from the captured image.
Implementation Method 1
a first polarization filter located between a lens of the camera and the display screen when the lens of the camera faces the display screen
Data Source
AI summary
An information processing system (2000) includes a camera (10), a polarization filter (20), a display device (30), and an information processing apparatus (200). The display device (30) includes a display screen (32), and an object (40) is placed on the display screen (32). The camera (10) has an image area in which the display screen (32) is included. The information processing apparatus (200) displays, on the display screen (32), a first display based on a captured image (12) generated by the camera (10). The polarization filter (20) is located between a lens of the camera (10) and the display screen (32) when the lens of the camera (10) faces the display screen (32).