Lensless Imaging Device Complex Sensor Image Processing
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Solution Overview
Problem
Lensless imaging devices face significant arithmetic processing challenges during focus adjustment and noise removal, leading to increased computational demands and inefficiencies in transmitting and processing sensor images.
Innovation Solution
The implementation of a modulator with a grating pattern, an image sensor, a complex sensor image processing unit, and a data transmission unit, which converts light into electrical signals and transmits complex sensor images to reduce communication data and simplify processing, enabling efficient focus adjustment and various imaging functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If focus adjustment and noise removal are performed on sensor images from lensless imaging devices, then imaging functions such as auto focus and ranging can be achieved, but enormous arithmetic processing is required due to repeated multiplication by reconstruction patterns and noise removal calculations
Solution Approach 1:
The patent applies preliminary action by performing the fringe scan operation and generating the complex sensor image before transmission. This preprocessing step converts the raw sensor image into a complex representation that encodes depth and focus information, thereby eliminating the need for repeated multiplication by reconstruction patterns during post-processing focus adjustment. The complex sensor image is transmitted to the server, which then performs focus adjustment with significantly reduced computational load.
2Adaptability or versatility
If sensor images are transmitted for further processing and analysis, then network connectivity and expanded application range are achieved, but the amount of communication data increases
Solution Approach 1:
The patent applies parameter changes by transforming the sensor image into a complex sensor image with complex number values. This transformation changes the data structure and encoding format, allowing the same amount of information to be represented more efficiently. The complex sensor image contains encoded depth and focus information that enables subsequent processing with reduced data requirements compared to transmitting and processing multiple raw sensor images at different focus positions.
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 solution significantly reduces arithmetic processing requirements, allowing for efficient transmission and processing of sensor images, thereby enhancing the functionality and performance of lensless imaging devices while minimizing computational load and data transmission bandwidth.
Implementation Method 1
a modulator configured to modulate the intensity of light, based on a grating pattern
Implementation Method 2
the signal processing unit modulates the image signals output from the image storage unit in accordance with an imaginary second grating pattern composed of multiple concentric circles, thereby generating a moire fringe image
Implementation Method 3
an image sensor configured to convert light passing through the modulator to electrical signals to generate a sensor image
Data Source
AI summary
An imaging device includes: a modulator configured to modulate the intensity of light, based on a grating pattern; an image sensor configured to convert light passing through the modulator to electrical signals to generate a sensor image; a complex sensor image processing unit configured to generate, from the sensor image, a complex sensor image comprising a complex number; and a data transmission unit configured to transmit the complex sensor image.