A Bernoulli sampling based image real-time compression method for high-speed camera

WANG Bin; LIANG Jie; WANG Pan; GU Zhenghua; GAI Wen

doi:10.11729/syltlx20200052

Volume 35 Issue 6

Dec. 2021

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Journal of Experiments in Fluid Mechanics > 2021 > 35(6): 52-57. > DOI: 10.11729/syltlx20200052

WANG B，LIANG J，WANG P，et al. A Bernoulli sampling based image real-time compression method for high-speed camera[J]. Journal of Experiments in Fluid Mechanics, 2021，35（6）：52-57.. DOI: 10.11729/syltlx20200052

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A Bernoulli sampling based image real-time compression method for high-speed camera

Facility Design and Instrumentation Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan　621000, China

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Received Date: April 06, 2020
Revised Date: June 20, 2021
Available Online: December 09, 2021

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Abstract

High-speed cameras are widely used in explosive mechanics, hydrodynamics, trajectory observation and other scientific research experiments. Due to massive data and the limit of storage and bandwidth of electronic system, high-speed cameras cannot shoot for long periods of time. Compression of captured images is an effective way to extend the recording time of the high-speed cameras. However, the existing image compression methods can not solve high-speed camera mass image compression task caused by the large calculation complexity and long calculation time. In this paper, a low hardware cost, real-time image compression method with Bernoulli sampling is developed. The method randomly samples the pixels with Bernoulli distribution directly in the process of CCD or CMOS image acquisition. Then in usage, the raw image is reconstructed with the unknown pixel estimating method. The simulation results show that the main visual information of the image can still be observed from the reconstruction image, even when the image compression rate reaches 99%, which is superior to the super-resolution enhancement result of the TOM (Thin Out Mode) with interpolation.
- high-speed photography,
- image compression,
- Bernoulli distribution

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