Oleksandr Rokovyi

Dr. Oleksandr Rokovyi

orcid

Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
12 May 2018
Verified
Book Chapter
Closed access
PDF file
Yuri GordienkoYuri Gordienko
Yuri Gordienko
PGPeng Gang
Peng Gang
JHJiang Hui
Jiang Hui
WZWei Zeng
Wei Zeng
YKYu. Kochura
Yu. Kochura
SSS. Stirenko
S. Stirenko

1 April 2018
Verified
Conference Paper
Closed access
SSSergii Stirenko
Sergii Stirenko
YKYuriy Kochura
Yuriy Kochura
OAOleg Alienin
Oleg Alienin
OROleksandr Rokovyi
Oleksandr Rokovyi
Yuri GordienkoYuri Gordienko
Yuri Gordienko
WZWei Zeng
Wei Zeng
The results of chest X-ray (CXR) analysis of 2D images to get the statistically reliable predictions (availability of tuberculosis) by computer-aided diagnosis (CADx) on the basis of deep learning are presented. They demonstrate the efficiency of lung segmentation, lossless and lossy data augmentation for CADx of tuberculosis by deep convolutional neural network (CNN) applied to the small and not well-balanced dataset even. CNN demonstrates ability to train (despite overfitting) on the pre-processed dataset obtained after lung segmentation in contrast to the original not-segmented dataset. Lossless data augmentation of the segmented dataset leads to the lowest validation loss (without overfitting) and nearly the same accuracy (within the limits of standard deviation) in comparison to the original and other pre-processed datasets after lossy data augmentation. The additional limited lossy data augmentation results in the lower validation loss, but with a decrease of the validation accuracy. In conclusion, besides the more complex deep CNNs and bigger datasets, the better progress of CADx for the small and not well-balanced datasets even could be obtained by better segmentation, data augmentation, dataset stratification, and exclusion of non-evident outliers.

1 March 2018
Verified
Conference Paper
Closed access
PGPeng Gang
Peng Gang
WZWang Zhen
Wang Zhen
WZWei Zeng
Wei Zeng
Yuri GordienkoYuri Gordienko
Yuri Gordienko
YKYuriy Kochura
Yuriy Kochura
SSSergii Stirenko
Sergii Stirenko
The efficiency of some dimensionality reduction techniques, like lung segmentation, bone shadow exclusion, and t-distributed stochastic neighbor embedding (t-SNE) for exclusion of outliers, is estimated for analysis of chest X-ray (CXR) 2D images by deep learning approach to help radiologists identify marks of lung cancer in CXR. Training and validation of the deep convolutional neural network (CNN) was performed on the open JSRT dataset (dataset #01), the JSRT after bone shadow exclusion - BSE-JSRT (dataset #02), JSRT after lung segmentation (dataset #03), BSE-JSRT after lung segmentation (dataset #04), and segmented BSE-JSRT after exclusion of outliers by t-SNE method (dataset #05). The results demonstrate that the pre-processed dataset obtained after lung segmentation, bone shadow exclusion, and filtering out the outliers by t-SNE (dataset #05) demonstrates the highest training rate and best accuracy in comparison to the other pre-processed datasets.

29 October 2023
Verified
Conference Paper
Open access
APAndrii Polukhin
Andrii Polukhin
Yuri GordienkoYuri Gordienko
Yuri Gordienko
MLMairo Leier
Mairo Leier
GJGert Jervan
Gert Jervan
OROleksandr Rokovyi
Oleksandr Rokovyi
SSSergii Stirenko
Sergii Stirenko
The investigation of the feasibility of using the YOLO (You Only Look Once) architecture for object detection in infrared images from unmanned aerial vehicles (UAVs) on low-power devices, specifically the Raspberry Pi, and Orange Pi, is conducted. The study measures the consumption of computing resources for each device, such as inference time (ms), peak power consumption (W), memory consumption (MB), inference energy (J), memory consumption (MB), and storage consumption (MB). It also investigates the correlation between number of model parameters and resource consumption of the different YOLO model sizes. Finally, the study draws conclusions about the expediency and realism of using YOLO on low-power devices for Edge Intelligence and proposes methods of speeding up work. The results show that YOLO can be used effectively on low-power devices with some optimizations to increase performance and energy efficiency.


7 December 2018
Verified
Book Chapter
Closed access
PDF file
SSSergii Stirenko
Sergii Stirenko
PGPeng Gang
Peng Gang
WZWei Zeng
Wei Zeng
Yuri GordienkoYuri Gordienko
Yuri Gordienko
OAOleg Alienin
Oleg Alienin
ARAnis Rojbi
Anis Rojbi