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IMPACTS OF AZIMUTH ANTENNA STEERING ANGLE QUANTIZATION ON TOPS AND SLIDING SPOTLIGHT SAR IMAGE
会议论文
IGARSS 2018 - 2018 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, 2018-01-01
作者:
Zeng, Hong-cheng
;
Chen, Jie
;
Yang, Wei
;
Zhang, Hao-jie
收藏
  |  
浏览/下载:3/0
  |  
提交时间:2019/12/30
TOPS
Sliding Spotlight
Quantization Step Size
Azimuth Antenna Pattern
Spurious Target
Statistical Model of JPEG Noises and Its Application in Quantization Step Estimation
期刊论文
ieee transactions on image processing, 2015
Li, Bin
;
Ng, Tian-Tsong
;
Li, Xiaolong
;
Tan, Shunquan
;
Huang, Jiwu
收藏
  |  
浏览/下载:2/0
  |  
提交时间:2015/11/11
JPEG history
quantization noise
quantization step estimation
rounding noise
statistical inference
COMPRESSION HISTORY
TAMPERING DETECTION
IMAGES
DISTRIBUTIONS
STEGANALYSIS
ARTIFACTS
FORENSICS
A bit rate control adaptive optimization algorithm for H.264/AVC
会议论文
作者:
Chen, Bing-Quan
;
Liu, Da-Wei
;
Lei, Li
;
Liu, Hong-Li
收藏
  |  
浏览/下载:7/0
  |  
提交时间:2019/12/03
Adaptive optimization algorithm
I-frames
Linear prediction models
Peak signal to noise ratio
Pre-processing step
Quantization parameters
The complexity of image
Time correlations
A dither modulation audio watermarking algorithm based on HAS
期刊论文
Research Journal of Applied Sciences, Engineering and Technology, 2012, 卷号: 4, 期号: 21, 页码: 4206-4211
作者:
Huang, Yi-Bo
;
Zhang, Qiu-Yu
;
Liu, Zhao
;
Di, Yan-Jun
;
Yuan, Zhan-Ting
收藏
  |  
浏览/下载:18/0
  |  
提交时间:2020/11/14
Audition
Binary sequences
Discrete wavelet transforms
Image watermarking
Low pass filters
Modulation
Signal reconstruction
Adaptive
Blind extraction
Digital sequence
Dither modulation
Human auditory system
Low-pass filtering
Quantization step
Watermarking algorithms
一种基于残差图像分布的失真度模型
期刊论文
2010, 2010
陈雷
;
徐文立
;
陈峰
;
Chen Lei
;
Xu Wenli
;
Chen Feng
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  |  
浏览/下载:1/0
低密度奇偶检验码译码的高效量化算法
期刊论文
2010, 2010
裴玉奎
;
殷柳国
;
陆建华
;
PEI Yukui
;
YIN Liuguo
;
LU Jianhua
收藏
  |  
浏览/下载:1/0
Efficient quantization algorithm for low-density parity-check code decoding
期刊论文
2010, 2010
Pei Yukui
;
Yin Liuguo
;
Lu Jianhua
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  |  
浏览/下载:2/0
Improved spread transform dither modulation-based watermark algorithm based on step projection
期刊论文
IEEE International Symposium on Broadband Multimedia Systems and Broadcasting 2010, BMSB 2010 - Final Programme, 2010
作者:
Li, Xinchao
;
Liu, Ju
;
Sun, Jiande
;
Sun, Zhaowan
;
Hu, Ibo
收藏
  |  
浏览/下载:1/0
  |  
提交时间:2019/12/26
Content protection
Digital watermarking
Perceptual model
Quantization index modulation
STDM
Step-projection
Space camera imaging gain in-orbit adjusting strategy (EI CONFERENCE)
会议论文
2009 2nd International Conference on Intelligent Computing Technology and Automation, ICICTA 2009, October 10, 2009 - October 11, 2009, Changsha, Hunan, China
He X.
;
Jin G.
;
Wang J.
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  |  
浏览/下载:12/0
  |  
提交时间:2013/03/25
A Multi-Step Gain Adjusting Strategy (MSGAS) of space camera was proposed
which was used to get higher SNR (Signal-Noise Rate) image. When the space camera working in poor light condition
the CCD signal was so weak that it's difficult to get a clear image
to reduce the quantization noise and improve the SNR
we must amplify the CCD signal first and then quantize. The MSGAS was achieved by adjusting the gain of the CCD (Charge Couple Device) signal processor step by step
the upper limit and lower limit were set
if the MDN (Mean Digital Number) of a fixed length image data was not between the lower and upper limit
the gain was adjusted step by step. In the experiment
the upper limit
lower limit and the step were set
and the result of the experiment showed that MSGAS was robust and SNR was improved from 28 to 39. 2009 IEEE.
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