斑点图案
人工智能
计算机科学
散斑噪声
像素
卷积神经网络
结构光
计算机视觉
模式识别(心理学)
作者
Purnesh Badavath,Venugopal Raskatla,Vijay Kumar
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-02-13
卷期号:49 (4): 1045-1045
摘要
In this Letter, we introduce a novel, to the best of our knowledge, structured light recognition technique based on the 1D speckle information to reduce the computational cost. Compared to the 2D speckle-based recognition [ J. Opt. Soc. Am. A 39 , 759 ( 2022 ) 10.1364/JOSAA.446352 ], the proposed 1D speckle-based method utilizes only a 1D array (1× n pixels) of the structured light speckle pattern image ( n × n pixels). This drastically reduces the computational cost, since the required data is reduced by a factor of 1/ n . A custom-designed 1D convolutional neural network (1D-CNN) with only 2.4 k learnable parameters is trained and tested on 1D structured light speckle arrays for fast and accurate recognition. A comparative study is carried out between 2D speckle-based and 1D speckle-based array recognition techniques comparing the data size, training time, and accuracy. For a proof-of-concept for the 1D speckle-based structured light recognition, we have established a 3-bit free-space communication channel by employing structured light-shift keying. The trained 1D CNN has successfully decoded the encoded 3-bit gray image with an accuracy of 94%. Additionally, our technique demonstrates robust performance under noise variation showcasing its deployment in practical cost-effective real-world applications.
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