A 0.78 mW Low-Power 4.02 High-Compression Ratio Less than 10−6 BER Error-Tolerant Lossless Image Compression Hardware for Wireless Capsule Endoscopy System

2018 ◽  
Author(s):  
Jiwon Lee ◽  
Kyoung-Rog Lee ◽  
Hoi-Jun Yoo
Keyword(s):  
Image Compression ◽  
Low Power ◽  
Capsule Endoscopy ◽  
Compression Ratio ◽  
Wireless Capsule Endoscopy ◽  
High Compression Ratio ◽  
Lossless Image Compression ◽  
High Compression ◽  
Wireless Capsule

scholarly journals 3D DCT Based Image Compression Method for the Medical Endoscopic Application

Sensors ◽  
2021 ◽  
Vol 21 (5) ◽  
pp. 1817
Author(s):  
Jiawen Xue ◽  
Li Yin ◽  
Zehua Lan ◽  
Mingzhu Long ◽  
Guolin Li ◽  
...  
Keyword(s):  
Image Compression ◽  
Compression Ratio ◽  
Signal To Noise Ratio ◽  
Blocking Artifacts ◽  
Compression Method ◽  
High Compression Ratio ◽  
Multiplication Operation ◽  
3D Data ◽  
Wireless Capsule

This paper proposes a novel 3D discrete cosine transform (DCT) based image compression method for medical endoscopic applications. Due to the high correlation among color components of wireless capsule endoscopy (WCE) images, the original 2D Bayer data pattern is reconstructed into a new 3D data pattern, and 3D DCT is adopted to compress the 3D data for high compression ratio and high quality. For the low computational complexity of 3D-DCT, an optimized 4-point DCT butterfly structure without multiplication operation is proposed. Due to the unique characteristics of the 3D data pattern, the quantization and zigzag scan are ameliorated. To further improve the visual quality of decompressed images, a frequency-domain filter is proposed to eliminate the blocking artifacts adaptively. Experiments show that our method attains an average compression ratio (CR) of 22.94:1 with the peak signal to noise ratio (PSNR) of 40.73 dB, which outperforms state-of-the-art methods.

scholarly journals Design and Development of a Very Large Scale Integrated Circuit Architecture for a Digital Image Compression and Realization on Field Programmable Gate Array

2020 ◽  
Vol 9 (3) ◽  
pp. 3510-3516
Keyword(s):  
Image Compression ◽  
Compression Ratio ◽  
Integrated Circuit ◽  
Large Scale ◽  
Image Data ◽  
High Compression Ratio ◽  
Compression Technique ◽  
Research Challenges ◽  
High Compression ◽  
Image Pixels

The domain of image signal processing, image compression is the significant technique, which is mainly invented to reduce the redundancy of image data in order to able to transmit the image pixels with high quality resolution. The standard image compression techniques like losseless and lossy compression technique generates high compression ratio image with efficient storage and transmission requirement respectively. There are many image compression technique are available for example JPEG, DWT and DCT based compression algorithms which provides effective results in terms of high compression ratio with clear quality image transformation. But they have more computational complexities in terms of processing, encoding, energy consumption and hardware design. Thus, bringing out these challenges, the proposed paper considers the most prominent research papers and discuses FPGA architecture design and future scope in the state of art of image compression technique. The primary aim to investigate the research challenges toward VLSI designing and image compression. The core section of the proposed study includes three folds viz standard architecture designs, related work and open research challenges in the domain of image compression.

scholarly journals Lossless CFA Image Compression Chip Design for Wireless Capsule Endoscopy

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 107047-107057 ◽  
Author(s):  
Chiung-An Chen ◽  
Shih-Lun Chen ◽  
Chi-Hao Lioa ◽  
Patricia Angela R. Abu
Keyword(s):  
Image Compression ◽  
Capsule Endoscopy ◽  
Wireless Capsule Endoscopy ◽  
Chip Design ◽  
Wireless Capsule

scholarly journals Application of biogas to supply the high compression ratio engine

2019 ◽  
Vol 179 (4) ◽  
pp. 40-46
Author(s):  
Andrzej BIENIEK ◽  
Jarosław MAMALA ◽  
Mariusz GRABA ◽  
Krzysztof PRAŻNOWSKI ◽  
Michał ŚMIEJA ◽  
...  
Keyword(s):  
Low Power ◽  
Compression Ratio ◽  
Ecological Indicators ◽  
Gas Mixture ◽  
Electrical Machine ◽  
High Compression Ratio ◽  
Engine Operation ◽  
Ignition System ◽  
High Compression ◽  
Cogeneration System

The study concerns the use of biogas as a fuel for supplying a modified self-ignition engine. As a result of the modifications made, the compression ratio was reduced and the engine was equipped with an ignition system and an electronically activated engine throttle. The changes have made it possible to burn biogas in a high compression ratio engine. The paper presents the results of research conducted on a low power cogeneration system with engine that drives an electrical machine cooperating with a 380/400 V network. The analysis includes, among other things, the possibility of producing electricity using biogas. The paper presents the influence of regulatory parameters such as the volume and composition of the supplied gas mixture and the degree of throttle opening on the obtained engine operation indicators and the driven electric machine. The tests were carried out in relation to the obtained ecological indicators depending on the concentration in the exhaust of such substances as: HC, CO, NOx.

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