scholarly journals Block-Based Compressive Sensing Using Soft Thresholding of Adaptive Transform Coefficients

2020 ◽  
Vol 17 (1) ◽  
pp. 131-146
Author(s):  
Hadi Hadizadeh ◽  
Keyword(s):  
Compressive Sensing ◽  
Soft Thresholding ◽  
Transform Coefficients ◽  
Block Based ◽  
Adaptive Transform

Denoising Ultrasound Medical Images

2017 ◽  
pp. 761-775
Author(s):  
A.S.C.S. Sastry ◽  
P.V.V. Kishore ◽  
Ch. Raghava Prasad ◽  
M.V.D. Prasad
Keyword(s):  
Image Quality ◽  
Medical Images ◽  
Ultrasound Image ◽  
Similarity Index ◽  
Speckle Noise ◽  
Ultrasound Images ◽  
Medical Ultrasound ◽  
Soft Thresholding ◽  
Block Based

Medical ultrasound imaging has revolutioned the diagnostics of human body in the last few decades. The major drawback of ultrasound medical images is speckle noise. Speckle noise in ultrasound images is because of multiple reflections of ultrasound waves from hard tissues. Speckle noise degrades the medical ultrasound images lessening the visible quality of the image. The aim of this paper is to improve the image quality of ultrasound medical images by applying block based hard and soft thresholding on wavelet coefficients. Medical ultrasound image transformation to wavelet domain uses debauchee's mother wavelet. Divide the approximate and detailed coefficients into uniform blocks of size 8×8, 16×16, 32×32 and 64×64. Hard and soft thresholding on these blocks of approximate and detailed coefficients reduces speckle noise. Inverse transformation to original spatial domain produces a noise reduced ultrasound image. Experiments on medical ultrasound images obtained from diagnostic centers in Vijayawada, India show good improvements to ultrasound images visually. Quality of improved images in measured using peak signal to noise ratio (PSNR), image quality index (IQI), structural similarity index (SSIM).

Convergence Complexity Reduction for Block-based Compressive Sensing Reconstruction

2014 ◽  
Vol 19 (2) ◽  
pp. 240-249 ◽  
Author(s):  
Younggyun Park ◽  
Hiuk Jae Shim ◽  
Byeungwoo Jeon
Keyword(s):  
Compressive Sensing ◽  
Complexity Reduction ◽  
Block Based

CMOS Image Sensor With Area-Efficient Block-Based Compressive Sensing

2015 ◽  
Vol 15 (7) ◽  
pp. 3699-3710 ◽  
Author(s):  
Mohammadreza Dadkhah ◽  
M. Jamal Deen ◽  
Shahram Shirani
Keyword(s):  
Compressive Sensing ◽  
Cmos Image Sensor ◽  
Image Sensor ◽  
Block Based ◽  
Area Efficient

scholarly journals Rate Allocation for Block-based Compressive Sensing

2015 ◽  
Vol 20 (3) ◽  
pp. 398-407 ◽  
Author(s):  
Quang Hong Nguyen ◽  
Khanh Quoc Dinh ◽  
Viet Anh Nguyena ◽  
Chien Van Trinh ◽  
Younghyeon Park ◽  
...  
Keyword(s):  
Compressive Sensing ◽  
Rate Allocation ◽  
Block Based
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