Search Results for author: Shahram Shirani

Found 22 papers, 3 papers with code

A Parametric Rate-Distortion Model for Video Transcoding

no code implementations13 Apr 2024 Maedeh Jamali, Nader Karimi, Shadrokh Samavi, Shahram Shirani

By utilizing our model in this manner, quality improvements up to 2 dB and bitrate savings of up to 46% of the original target bitrate are possible.

High-Quality Live Video Streaming via Transcoding Time Prediction and Preset Selection

no code implementations8 Dec 2023 Zahra Nabizadeh Shahre-Babak, Nader Karimi, Krishna Rapaka, Tarek Amara, Shadrokh Samavi, Shahram Shirani

One solution is to predict each preset's transcoding time and select the preset that ensures the highest quality while adhering to live streaming time constraints.

A New Non-Negative Matrix Factorization Approach for Blind Source Separation of Cardiovascular and Respiratory Sound Based on the Periodicity of Heart and Lung Function

no code implementations3 May 2023 Yasaman Torabi, Shahram Shirani, James P. Reilly

In this study, a modified version of the affine non-negative matrix factorization (NMF) approach is proposed to blindly separate lung and heart sounds recorded by a digital stethoscope.

blind source separation

Dynamic-Pix2Pix: Noise Injected cGAN for Modeling Input and Target Domain Joint Distributions with Limited Training Data

1 code implementation15 Nov 2022 Mohammadreza Naderi, Nader Karimi, Ali Emami, Shahram Shirani, Shadrokh Samavi

Helping the cGAN learn the target distribution from noise input results in a better model generalization during the test time and allows the model to fit almost perfectly to the target domain distribution.

Domain Generalization

OAIR: Object-Aware Image Retargeting Using PSO and Aesthetic Quality Assessment

1 code implementation11 Sep 2022 Mohammad Reza Naderi, Mohammad Hossein Givkashi, Nader Karimi, Shahram Shirani, Shadrokh Samavi

The PSO algorithm uses aesthetic quality assessment as its objective function to identify the best location and size for the objects to be placed in the background.

Image Quality Assessment Image Retargeting +1

Adaptive search area for fast motion estimation

no code implementations9 Apr 2022 S. M. Reza Soroushmehr, Shadrokh Samavi, Shahram Shirani

This search area is similar to that of the full search (FS) algorithm but smaller for most blocks of a frame.

Motion Estimation

A fast semi-automatic method for classification and counting the number and types of blood cells in an image

no code implementations18 Apr 2020 Hamed Sadeghi, Shahram Shirani, David W. Capson

A novel and fast semi-automatic method for segmentation, locating and counting blood cells in an image is proposed.

Template Matching

Acceleration of Convolutional Neural Network Using FFT-Based Split Convolutions

no code implementations27 Mar 2020 Kamran Chitsaz, Mohsen Hajabdollahi, Nader Karimi, Shadrokh Samavi, Shahram Shirani

In this paper, a new method for CNN processing in the FFT domain is proposed, which is based on input splitting.

Quantization

Unlabeled Data Deployment for Classification of Diabetic Retinopathy Images Using Knowledge Transfer

no code implementations9 Feb 2020 Sajjad Abbasi, Mohsen Hajabdollahi, Nader Karimi, Shadrokh Samavi, Shahram Shirani

Knowledge distillation is recently proposed to transfer the knowledge of a model to another one and can be useful to cover the shortcomings of transfer learning.

General Classification Knowledge Distillation +1

Splitting Convolutional Neural Network Structures for Efficient Inference

no code implementations9 Feb 2020 Emad Malekhosseini, Mohsen Hajabdollahi, Nader Karimi, Shadrokh Samavi, Shahram Shirani

For convolutional neural networks (CNNs) that have a large volume of input data, memory management becomes a major concern.

Management

Convolutional Neural Network Pruning Using Filter Attenuation

no code implementations9 Feb 2020 Morteza Mousa-Pasandi, Mohsen Hajabdollahi, Nader Karimi, Shadrokh Samavi, Shahram Shirani

In the proposed attenuation approach, weak filters are not abruptly removed, and there is a chance for these filters to return to the network.

Image Classification Network Pruning

Real time ridge orientation estimation for fingerprint images

no code implementations13 Oct 2017 Eman Alibeigi, Shadrokh Samavi, Shahram Shirani, Zahra Rahmani

Most of the automatic verification systems are based on matching of fingerprint minutiae.

Vessel Segmentation and Catheter Detection in X-Ray Angiograms Using Superpixels

no code implementations8 Sep 2017 Hamid R. Fazlali, Nader Karimi, S. M. Reza Soroushmehr, Shahram Shirani, Brahmajee. K. Nallamothu, Kevin R. Ward, Shadrokh Samavi, Kayvan Najarian

In this framework we use our catheter detection and tracking method which detects the catheter by finding its ridge in the first frame and traces in other frames by fitting a second order polynomial on it.

Segmentation Superpixels

Adaptive Real-Time Removal of Impulse Noise in Medical Images

no code implementations6 Sep 2017 Zohreh HosseinKhani, Mohsen Hajabdollahi, Nader Karimi, Reza Soroushmehr, Shahram Shirani, Kayvan Najarian, Shadrokh Samavi

In this paper a low complexity de-noising method is proposed that removes the noise by local analysis of the image blocks.

OCRAPOSE II: An OCR-based indoor positioning system using mobile phone images

no code implementations19 Apr 2017 Hamed Sadeghi, Shahrokh Valaee, Shahram Shirani

Then, it finds depth and angle-of-view of the query using the information provided by the OCR engine in order to refine the location estimate.

Depth Estimation Optical Character Recognition +1

Subjective and Objective Quality Assessment of Image: A Survey

no code implementations30 Jun 2014 Pedram Mohammadi, Abbas Ebrahimi-Moghadam, Shahram Shirani

Measuring the image quality is of fundamental importance for numerous image processing applications, where the goal of image quality assessment (IQA) methods is to automatically evaluate the quality of images in agreement with human quality judgments.

Image Quality Assessment MS-SSIM +1

Cannot find the paper you are looking for? You can Submit a new open access paper.