219 citations · 223 across the 13 of their papers we have counts for
13 papers
Poisson Image Denoising Using Minimax Concave and Reweighted Penalties: Nonblind and Blind Approaches
Reza Parvaz
Images are important tools in various sciences. Despite the development of photo-taking tools, creating clear and image without noise remains challenging in practice. In particular…
Framelet-Based Blind Image Restoration with Minimax Concave Regularization
Heng Zhang, Reza Parvaz, Rui Yang
Recovering corrupted images is one of the most challenging problems in image processing. Among various restoration tasks, blind image deblurring has been extensively studied due to…
Semi-Blind Image Deblurring Based on Framelet Prior
M. Zarebnia, R. Parvaz
The problem of image blurring is one of the most studied topics in the field of image processing. Image blurring is caused by various factors such as hand or camera shake. To resto…
Poissonian Blurred Image Deconvolution by Framelet based Local Minimal Prior
Reza Parvaz
Image production tools do not always create a clear image, noisy and blurry images are sometimes created. Among these cases, Poissonian noise is one of the most famous noises that…
Point spread function estimation for blind image deblurring problems based on framelet transform
Reza Parvaz
One of the most important issues in the image processing is the approximation of the image that has been lost due to the blurring process. These types of matters are divided into n…
A hybrid chaos map with two control parameters to secure image encryption algorithms
Roghayeh Hosseinzadeh, Yavar Khedmati, Reza Parvaz
In this paper, we introduce a hybrid chaos map for image encryption method with high sensitivity. This new map is sensitive to small changes in the starting point and also in contr…
Four-dimensional hybrid chaos system and its application in creating a secure image transfer environment by cellular automata
R. Parvaz, Y. Khedmati, Y. Behroo
One of the most important and practical researches which has been considered by researchers is creating secure environments for information exchanges. Due to their structures, chao…
Color image restoration with impulse noise based on fractional-order total variation and framelet
Reza Parvaz
Restore lost images due to noise and blurred is a burgeoning subject in image processing and despite the different algorithms on this subject, but the effort to improve is always c…
A new type of 4D Hybrid Chaos Systems
Reza Parvaz
In this paper a new type of chaotic system based on sin and logistic systems is introduced. Also the behavior of this new system is studied by using various tests. The results of t…
2D Hybrid chaos map for image security transform based on framelet and cellular automata
Y. Khedmati, R. Parvaz, Y. Behroo
In this paper, we provide some safe ways to transfer images securely by using cryptography and steganography methods. In order to enhance the security of the image transmission, we…
Multi-color image compression-encryption algorithm based on chaotic system and fuzzy transform
M. Zarebnia, R. Kianfar, R. Parvaz
In this paper an algorithm for multi-color image compression-encryption is introduced. For compression step fuzzy transform based on exponential b-spline function is used. In encry…
A combination chaotic system and application in color image encryption
R. Parvaz, M. Zarebnia
In this paper, by using Logistic, Sine and Tent systems we define a combination chaotic system. Some properties of the chaotic system are studied by using figures and numerical res…
A collocation method for numerical solution of Telegraph equation
M. Zarebnia, R. Parvaz
In this paper, B-spline collocation method is developed for the solution of one-dimensional hyperbolic telegraph equation. The convergence of the method is proved. Also the method…