AP 2.jpg
The road to wisdom? — Well, it's plain
and simple to express:
Err
  and err
    and err again
but less
  and less
    and less.
                            Piet Hein

Academic and Professional Background[edit | edit source]

A Ph.D. candidate at Michigan Technological University specializing in computer vision in additive manufacturing with in-depth knowledge of pattern recognition and texture analysis, as well as hands-on experience in object segmentation and point cloud processing. Strong background in embedded sensor systems and motor control.

Completed Bachelor's program in Robotics and Master's program in Physics and Mathematics. I am highly passionate about combining advanced computer vision and augmented reality technologies with intelligent sensor systems in solving manufacturing problems.

academia | scholar | linkedin

Research Interests[edit | edit source]

Publications[edit | edit source]

Projects[edit | edit source]

Computer vision-based layer-wise 3D printing analysis[edit | edit source]

Apetsiuk projects layer wise 3d printing analysis v1.jpg

The layer-wise 3D printing analysis is built upon multiple-stage monocular image examination, which allows monitoring both the external shape of the printed object and internal structure of its layers. Starting with the side-view height validation, the developed program analyzes the virtual top view for outer shell contour correspondence using the multi-template matching and iterative closest point algorithms, as well as inner layer texture quality clustering the spatial-frequency filter responses with Gaussian mixture models and segmenting structural anomalies with the agglomerative hierarchical clustering algorithm. This allows evaluation of both global and local parameters of the printing modes.

A.L. Petsiuk, J.M. Pearce. Open source computer vision-based layer-wise 3D printing analysis. Additive Manufacturing 2020, 36, 101473. https://doi.org/10.1016/j.addma.2020.101473.


Filament diameter sensor for recycling and winding machines[edit | edit source]

Apetsiuk projects filament diameter sensor v1.jpg

The modular system for multi-axis optical control of the diameter of the recycled 3D-printer filament makes it possible to scan part of the surface of the processed filament, save the history of measurements along the entire length of the spool, as well as mark defective areas.

A.L. Petsiuk, J.M. Pearce. Open source filament diameter sensor for recycling, winding, and additive manufacturing machines. ASME. J. Manuf. Sci. Eng. 2021, 143(10): 105001. https://doi.org/10.1115/1.4050762.


Texture analysis: histogram similarity metrics[edit | edit source]

Apetsiuk projects histogram similarity v1.jpg

Layer-wise analysis of 3D printing quality based on histogram similarities.

 

 

 

 


Analog image processing (4F optical correlator simulation)[edit | edit source]

Apetsiuk projects 4f correlator matlab v1.jpg

A Matlab simulation for a 4F Correlator system is based on the Fourier transforming properties of lenses. The 4F Optical Correlator system is based on the Fourier transforming properties of lenses. According to the Diffraction theory, a convex lens of focal length f will produce the Fourier transform at a distance f behind the lens of an object placed at f distance in front of the lens. These properties give us an opportunity to implement direct and inverse Fourier transforms of two-dimensional objects, modify and analyze their spatial frequency spectra.

Code


Bag valve mask-based ventilator[edit | edit source]

BagValve.jpg

The resuscitation system is based on the Arduino controller with a real-time operating system installed on a largely RepRap 3-D printable parametric component-based structure. The device provides a controlled breathing mode with tidal volumes from 100 to 800 mL, breathing rates from 5 to 40 breaths/minute, and inspiratory-to-expiratory ratio from 1:1 to 1:4.

A. Petsiuk, N. Tanikella, S. Dertinger, A. Pringle, S. Oberloier, J. Pearce. Partially RepRapable automated open source bag valve mask-based ventilator. HardwareX 2020, 8, e00131. https://doi.org/10.1016/j.ohx.2020.e00131.

Video


Ultrasound-based navigational support with haptic feedback[edit | edit source]

Apetsiuk projects haptic feedback v1.jpg

The system conveys point-distance information by utilizing the natural active sensing approach and modulates measurements into haptic feedback with various vibration patterns within the four-meter range.

A.L. Petsiuk, J.M. Pearce. Low-cost open source ultrasound-sensing based navigational support for the visually impaired. Sensors 2019, 19, 3783. https://doi.org/10.3390/s19173783.

Appropedia page OSF Repository Video


Centrifuge monitor[edit | edit source]

Apetsiuk projects centrifuge monitor v1.jpg

As the working part of the centrifuge rotates at a speed of up to 2000 rpm, it may be difficult to track its motion, since the majority of regular web cameras operate at a frequency of 25–30 Hz. Thus, as the whole system represents a mechanical transmission with the fixed gear ratio, an indirect method was chosen to calculate the angular velocity of the tubes based on the speed of rotation of the centrifuge handle.

S.S. Sule, A.L. Petsiuk and J.M. Pearce. Open Source Completely 3-D Printable Centrifuge. Instruments 2019, 3(2), 30; https://doi.org/10.3390/instruments3020030.

Video


Michigan Tech's open-source community[edit | edit source]

Michigan Tech’s home for all things free and open source.

opensource.mtu.edu



FFT sound analysis

Web weather monitor

Solar panels


Co-authors – Collaborators[edit | edit source]

Dr. Joshua Pearce Shane Oberloier Samantha Dertinger Nagendra Tanikella
Dr. Mazher Mohammed Adam Pringle Koami Hayibo
Dr. Paul Sanders Pierce Mayville Rachel Dick


MOST Methods and Literature Reviews[edit | edit source]