scholarly journals Performance Evaluation of Data Compression Systems Applied to Satellite Imagery

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Lilian N. Faria ◽  
Leila M. G. Fonseca ◽  
Max H. M. Costa
Keyword(s):  
Performance Evaluation ◽  
Image Quality ◽  
Data Storage ◽  
Compression Ratio ◽  
Rate Distortion ◽  
Quality Analysis ◽  
Sensing Applications ◽  
Quantitative Performance ◽  
Jpeg Xr ◽  
Evaluation Of Data

Onboard image compression systems reduce the data storage and downlink bandwidth requirements in space missions. This paper presents an overview and evaluation of some compression algorithms suitable for remote sensing applications. Prediction-based compression systems, such as DPCM and JPEG-LS, and transform-based compression systems, such as CCSDS-IDC and JPEG-XR, were tested over twenty multispectral (5-band) images from CCD optical sensor of the CBERS-2B satellite. Performance evaluation of these algorithms was conducted using both quantitative rate-distortion measurements and subjective image quality analysis. The PSNR, MSSIM, and compression ratio results plotted in charts and the SSIM maps are used for comparison of quantitative performance. Broadly speaking, the lossless JPEG-LS outperforms other lossless compression schemes, and, for lossy compression, JPEG-XR can provide lower bit rate and better tradeoff between compression ratio and image quality.

Performance Evaluation of Data Transmission in Maritime Delay-Tolerant-Networks

2013 ◽  
Vol E96.B (6) ◽  
pp. 1435-1443 ◽  
Author(s):  
Shuang QIN ◽  
Gang FENG ◽  
Wenyi QIN ◽  
Yu GE ◽  
Jaya Shankar PATHMASUNTHARAM
Keyword(s):  
Performance Evaluation ◽  
Data Transmission ◽  
Delay Tolerant Networks ◽  
Delay Tolerant ◽  
Evaluation Of Data

Standardization of Image Quality Analysis – ISO 19264

2016 ◽  
Vol 2016 (1) ◽  
pp. 111-116 ◽  
Author(s):  
Dietmar Wueller ◽  
Ulla Bøgvad Kejser
Keyword(s):  
Image Quality ◽  
Quality Analysis ◽  
Image Quality Analysis

Image Quality Analysis of X-ray Grating Interferometer Using Integrating-bucket Method

2020 ◽  
Vol 64 (2) ◽  
pp. 20503-1-20503-5
Author(s):  
Faiz Wali ◽  
Shenghao Wang ◽  
Ji Li ◽  
Jianheng Huang ◽  
Yaohu Lei ◽  
...  
Keyword(s):  
Image Quality ◽  
Phase Contrast ◽  
Quality Analysis ◽  
Phase Contrast Imaging ◽  
Phase Image ◽  
Contrast Imaging ◽  
High Quality ◽  
Image Quality Analysis ◽  
X Ray ◽  
Grating Interferometer

Abstract Grating-based x-ray phase-contrast imaging has the potential to enhance image quality and provide inner structure details non-destructively. In this work, using grating-based x-ray phase-contrast imaging system and employing integrating-bucket method, the quantitative expressions of signal-to-noise ratios due to photon statistics and mechanical error are analyzed in detail. Photon statistical noise and mechanical error are the main sources affecting the image noise in x-ray grating interferometry. Integrating-bucket method is a new phase extraction method translated to x-ray grating interferometry; hence, its image quality analysis would be of great importance to get high-quality phase image. The authors’ conclusions provide an alternate method to get high-quality refraction signal using grating interferometer, and hence increases applicability of grating interferometry in preclinical and clinical usage.

scholarly journals Lasing at the nanoscale: coherent emission of surface plasmons by an electrically driven nanolaser

Nanophotonics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 3965-3975 ◽  
Author(s):  
Dmitry Yu. Fedyanin ◽  
Alexey V. Krasavin ◽  
Aleksey V. Arsenin ◽  
Anatoly V. Zayats
Keyword(s):  
Data Storage ◽  
Surface Plasmon ◽  
Single Molecule ◽  
Optical Communication ◽  
Surface Plasmon Polariton ◽  
High Energy ◽  
Photonic Devices ◽  
Sensing Applications ◽  
Diverse Application ◽  
Plasmon Polariton

AbstractPlasmonics offers a unique opportunity to break the diffraction limit of light and bring photonic devices to the nanoscale. As the most prominent example, an integrated nanolaser is a key to truly nanoscale photonic circuits required for optical communication, sensing applications and high-density data storage. Here, we develop a concept of an electrically driven subwavelength surface-plasmon-polariton nanolaser, which is based on a novel amplification scheme, with all linear dimensions smaller than the operational free-space wavelength λ and a mode volume of under λ3/30. The proposed pumping approach is based on a double-heterostructure tunneling Schottky barrier diode and gives the possibility to reduce the physical size of the device and ensure in-plane emission so that the nanolaser output can be naturally coupled to a plasmonic or nanophotonic waveguide circuitry. With the high energy efficiency (8% at 300 K and 37% at 150 K), the output power of up to 100 μW and the ability to operate at room temperature, the proposed surface plasmon polariton nanolaser opens up new avenues in diverse application areas, ranging from ultrawideband optical communication on a chip to low-power nonlinear photonics, coherent nanospectroscopy, and single-molecule biosensing.

Image quality analysis and low dose dental CT

2005 ◽  
Vol 1281 ◽  
pp. 1177-1181 ◽  
Author(s):  
S.D. Bianchi ◽  
O. Rampado ◽  
L. Luberto ◽  
A.F. Genovesio ◽  
C.C. Bianchi ◽  
...  
Keyword(s):  
Image Quality ◽  
Low Dose ◽  
Quality Analysis ◽  
Image Quality Analysis ◽  
Dental Ct
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