Papers by Evrim Buyukaslan
MARMARA UNIVERSITY JOURNAL OF SCIENCE, 2015
Every year million tons of textile waste is being sent to landfills. It is estimated that in Turk... more Every year million tons of textile waste is being sent to landfills. It is estimated that in Turkey approximately half of the disposed textile waste is consisted of post-consumer textile waste. Although the amount of post-consumer textile waste is as high as pre-consumer textile waste, recovering opportunities for post-consumer textile waste is substantially disregarded. The purpose of this study is to make the preliminary work to investigate potential of post-consumer textile waste and recycling/reusing possibilities in Turkey by monitoring UK and US examples. This study may contribute to developing countries as many of them are lacking of an attempt to collect, recycle or reuse post-consumer textile waste.
MARMARA UNIVERSITY JOURNAL OF SCIENCE, 2015
Virtual prototyping is often used for animations and graphics; however it also has great advantag... more Virtual prototyping is often used for animations and graphics; however it also has great advantages for garment industry such as minimizing the time and customization of the garment for individual customers. 3 D body scanners offer better simulation results than a parametric body model. The aim of this study is to see how a garment is simulated on a scanned body model and a parametric body model. In addition we wanted to see the real fit of a skirt on a wearer and compare it with its virtual fitting. Thus we generated two virtual body models: a scanned and a parametric model. Meanwhile we determined a skirt design and created 2D patterns according to the design. Finally the skirt is tailored and generated 2D patterns are used to develop 3D virtual garments. It is well-known that mechanical properties of a fabric have influence on the simulation results. Thus mechanical properties of the fabric are measured by using Fabric Analysis by Simple Testing (FAST) and these data are utilized to generate a simulated skirt. At the end live model is dressed with produced skirt and photographed. Real garment fit and their virtual fits are compared to see how satisfactory the garment simulations are. Currently there are many studies to improve the virtual garment images. This study helps to understand the fit differences between garment simulations on a scanned body model and a parametric body model as well as a chance to compare them with the real fit on a live model.
Proceedings of the 6th International Conference on 3D Body Scanning Technologies, Lugano, Switzerland, 27-28 October 2015, 2015
Virtual garments are expected to break a fresh ground for textile and apparel industry. When flaw... more Virtual garments are expected to break a fresh ground for textile and apparel industry. When flawless virtual garments on virtual models are achieved, this triumph will hopefully put an end to costly prototype production and pave the way for shopping apparel online without any concerns. OptiTex is a CAD program that enables fashion designers to create their patterns and garments in a 3D form. This program allows user to insert body measurements to obtain the virtual model. 3D scanned body images can be also exported to OptiTex to achieve garment simulations on realistic body shapes. Even though 3D scanned body models are identically with the real body shape, the simulated garments are not that realistic yet. One of the underlying reasons is that, allocation of the garment on the avatar depends on the drape of the garment which is strongly correlated to fabric's mechanical properties. Fabrics are non-linear, non-homogeneous, viscoelastic structures which makes them very complicated to identify. On the contrary to many other materials, fabrics are subjected to very low loads such as gravity, body motions, skin frictions and fabrics own internal frictions. In this research, bending rigidity, shear rigidity, extension, compression of three compositionally same woven fabrics (53% polyester/ 43% wool, 4% elastane; plain weave) are measured by Fabric Assurance by Simple Testing (FAST) system. Drape ratio is another important fabric parameter which gives information about the formability of the fabric in real and virtual environment. "Cusick Drapemeter" is used to calculate drape ratio and number of drape nodes and amplitudes of the test fabrics. Finally real drape behaviors of these fabrics on a circular plate are compared with their virtual representations in OptiTex program in terms of drape ratios, node numbers and amplitudes. This study helps to understand how different fabrics drape on virtual avatars which can be provided from a 3D body scanner. At the end, the aim is to increase the interaction of garment and body model in virtual environment and obtain perfectly realistic representations of a virtual garment.
3D virtual garment simulation software packages offer various fabric alternatives in their fabric... more 3D virtual garment simulation software packages offer various fabric alternatives in their fabric libraries. However, these libraries are limited in terms of providing their users with particular fabric compositions, structures, and drape properties. When a specific fabric needs to be used for a garment simulation to understand how the end-product would look like, individual fabric mechanical properties must be entered into the software. For this purpose, usually fabric mechanical values measured by either KES or FAST systems are used. Although these systems provide precise measurements, they are very expensive to obtain. Our research questions emerged from the need to use alternative fabric testing devices to generate outputs to be used in 3D garment simulation software packages. The purpose of this study was to collect preliminary data to investigate if traditional textile testing equipment can be used instead of KES or FAST systems to create garment simulations in Optitex PDS 15.
Journal of Fashion Technology & Textile Engineering
In this study, we tested five woven fabrics and observed their virtual drape behaviors. Fabrics’ ... more In this study, we tested five woven fabrics and observed their virtual drape behaviors. Fabrics’ mechanical properties were measured by Fabric Assurance by Simple Testing (FAST) system and simulations were created by O/Dev simulation software by Optitex. Drape behaviors of fabrics on a circular disc model were simulated and obtained virtual drape images were processed by image analysis software to calculate drape parameters. The purpose of this study is to understand the visual perception of people when looking at a fabric drape simulation. Which feature of drape is actually more significant to human eye? A psychophysical test was developed to understand human selectivity for drape geometry in virtual environment. Finally, 27 participants’ psychophysical test results were compared to calculated values. Participants found to be most sensitive to evenness and placement of folds while they were least sensitive to fold sizes.
Research Journal of Textile and Apparel
Purpose Virtual garment fit will be an important determinant for the online purchase decision of ... more Purpose Virtual garment fit will be an important determinant for the online purchase decision of consumers in the near future. Therefore, the purpose of this study was to develop a conceptual model to explore the factors that might impact consumers’ virtual garment fit satisfactions (VFS). Design/methodology/approach Virtual body satisfaction (VBS), acceptance of the virtual try-on technology and virtual fabric properties were examined as factors that would potentially impact consumers’ VFS. Forty-five women, from 18 to 35 years old, were recruited for the study. Participants were scanned by using a 3D body scanner and their scans were used for virtual try-on. Seven circular skirts with different fabric properties were created by using a commercial 3D simulation software. Participants evaluated the fit of these virtual skirts on their own virtual bodies. Participants’ VFSs and their correlations with VBSs, acceptance of virtual try-on technology and virtual fabric properties were an...
Every year million tons of textile waste is being sent to landfills. It is estimated that in Turk... more Every year million tons of textile waste is being sent to landfills. It is estimated that in Turkey approximately half of the disposed textile waste is consisted of post-consumer textile waste. Although the amount of post-consumer textile waste is as high as pre-consumer textile waste, recovering opportunities for post-consumer textile waste is substantially disregarded. The purpose of this study is to make the preliminary work to investigate potential of post-consumer textile waste and recycling/reusing possibilities in Turkey by monitoring UK and US examples. This study may contribute to developing countries as many of them are lacking of an attempt to collect, recycle or reuse post-consumer textile waste.
Virtual prototyping is often used for animations and graphics; however it also has great advantag... more Virtual prototyping is often used for animations and graphics; however it also has great advantages for garment industry such as minimizing the time and customization of the garment for individual customers. 3 D body scanners offer better simulation results than a parametric body model. The aim of this study is to see how a garment is simulated on a scanned body model and a parametric body model. In addition we wanted to see the real fit of a skirt on a wearer and compare it with its virtual fitting. Thus we generated two virtual body models: a scanned and a parametric model. Meanwhile we determined a skirt design and created 2D patterns according to the design. Finally the skirt is tailored and generated 2D patterns are used to develop 3D virtual garments. It is well-known that mechanical properties of a fabric have influence on the simulation results. Thus mechanical properties of the fabric are measured by using Fabric Analysis by Simple Testing (FAST) and these data are utilized to generate a simulated skirt. At the end live model is dressed with produced skirt and photographed. Real garment fit and their virtual fits are compared to see how satisfactory the garment simulations are. Currently there are many studies to improve the virtual garment images. This study helps to understand the fit differences between garment simulations on a scanned body model and a parametric body model as well as a chance to compare them with the real fit on a live model.
In this study, a commercial 3D virtual garment simulation software (Optitex) is used to simulate ... more In this study, a commercial 3D virtual garment simulation software (Optitex) is used to simulate drape behaviours of five different fabrics. Mechanical properties of selected fabrics are measured by Fabric Assurance by Simple Testing (FAST) method. Measured bending, shear and extension properties of fabrics are inserted to the simulation software to achieve more realistic simulations. Simulation images of fabrics are shown to 27 people and they are asked to match real drape images of fabrics with simulated drape images. Fabric simulations of two fabrics were correctly matched by the majority of the test group. However, the other three fabrics' simulations were mismatched by most of the people.
International Journal of Clothing Science and Technology, 2018
Purpose – The purpose of this paper is to compare real fabric drape images and virtual fabric dra... more Purpose – The purpose of this paper is to compare real fabric drape images and virtual fabric drape
images created by a commercial software. To achieve an in-depth comparison, actual and virtual drape
shape properties were considered under three categories: drape area, number of nodes and shape of
folds. The results of this research are expected to be useful to improve the reality and accuracy of fabric
and garment.
Design/methodology/approach – Five different fabrics were selected for this study. Fabrics’ mechanical
properties were tested by fabric assurance for simple testing method, while drape properties were measured
by a Cusick drape meter. A commercial garment simulation was used to generate virtual fabric drapes.
Real fabric drape images and virtual fabric drape images were analyzed by an image analysis software and
results were used to calculate drape properties. Regression analysis was performed to compare real fabric
drape and virtual fabric drape properties.
Findings – Differences between real fabric drape and virtual fabric drape were stated clearly. Simulation
software was found to be insufficient to reflect drape area. However, simulations were quite successful
corresponding to the number of nodes. Only one simulation had +2 nodes than its actual counterpart. This
study showed that area and node shape representations of simulation software should be improved while
node numbers are sufficiently represented.
Research limitations/implications – There are alternative 3D garment simulation software available to
the fashion business. All these companies are working on to improve their simulation reality and accuracy.
Some of them are also offering various equipment to measure the fabric properties. In this study, Optitex
3D Suite was selected as the simulation software due to several reasons as explained in this paper.
However, other simulation programs might also be employed to perform virtual fabric drapes.
Furthermore, in this study, the drape images of five woven fabrics were compared. The fabric selection was
done according to a pre-test and consequently similar fabrics were determined to be the subject of the
study. However, the more the number of the fabrics, the better the comparison and eventually the better the
assessment of simulation success. Therefore, it is prospected to test more fabrics with versatile fabric
properties for further studies.
Originality/value – Drape shape was observed from three perspectives: drape area, node numbers, and
node shapes. Dealing the problem from these perspectives provided an in-depth comparison of real and
virtual drapes. In this study, standard deviation of peak angles was used to explain node distribution that is
new to the literature to the authors’ knowledge.
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Papers by Evrim Buyukaslan
images created by a commercial software. To achieve an in-depth comparison, actual and virtual drape
shape properties were considered under three categories: drape area, number of nodes and shape of
folds. The results of this research are expected to be useful to improve the reality and accuracy of fabric
and garment.
Design/methodology/approach – Five different fabrics were selected for this study. Fabrics’ mechanical
properties were tested by fabric assurance for simple testing method, while drape properties were measured
by a Cusick drape meter. A commercial garment simulation was used to generate virtual fabric drapes.
Real fabric drape images and virtual fabric drape images were analyzed by an image analysis software and
results were used to calculate drape properties. Regression analysis was performed to compare real fabric
drape and virtual fabric drape properties.
Findings – Differences between real fabric drape and virtual fabric drape were stated clearly. Simulation
software was found to be insufficient to reflect drape area. However, simulations were quite successful
corresponding to the number of nodes. Only one simulation had +2 nodes than its actual counterpart. This
study showed that area and node shape representations of simulation software should be improved while
node numbers are sufficiently represented.
Research limitations/implications – There are alternative 3D garment simulation software available to
the fashion business. All these companies are working on to improve their simulation reality and accuracy.
Some of them are also offering various equipment to measure the fabric properties. In this study, Optitex
3D Suite was selected as the simulation software due to several reasons as explained in this paper.
However, other simulation programs might also be employed to perform virtual fabric drapes.
Furthermore, in this study, the drape images of five woven fabrics were compared. The fabric selection was
done according to a pre-test and consequently similar fabrics were determined to be the subject of the
study. However, the more the number of the fabrics, the better the comparison and eventually the better the
assessment of simulation success. Therefore, it is prospected to test more fabrics with versatile fabric
properties for further studies.
Originality/value – Drape shape was observed from three perspectives: drape area, node numbers, and
node shapes. Dealing the problem from these perspectives provided an in-depth comparison of real and
virtual drapes. In this study, standard deviation of peak angles was used to explain node distribution that is
new to the literature to the authors’ knowledge.
images created by a commercial software. To achieve an in-depth comparison, actual and virtual drape
shape properties were considered under three categories: drape area, number of nodes and shape of
folds. The results of this research are expected to be useful to improve the reality and accuracy of fabric
and garment.
Design/methodology/approach – Five different fabrics were selected for this study. Fabrics’ mechanical
properties were tested by fabric assurance for simple testing method, while drape properties were measured
by a Cusick drape meter. A commercial garment simulation was used to generate virtual fabric drapes.
Real fabric drape images and virtual fabric drape images were analyzed by an image analysis software and
results were used to calculate drape properties. Regression analysis was performed to compare real fabric
drape and virtual fabric drape properties.
Findings – Differences between real fabric drape and virtual fabric drape were stated clearly. Simulation
software was found to be insufficient to reflect drape area. However, simulations were quite successful
corresponding to the number of nodes. Only one simulation had +2 nodes than its actual counterpart. This
study showed that area and node shape representations of simulation software should be improved while
node numbers are sufficiently represented.
Research limitations/implications – There are alternative 3D garment simulation software available to
the fashion business. All these companies are working on to improve their simulation reality and accuracy.
Some of them are also offering various equipment to measure the fabric properties. In this study, Optitex
3D Suite was selected as the simulation software due to several reasons as explained in this paper.
However, other simulation programs might also be employed to perform virtual fabric drapes.
Furthermore, in this study, the drape images of five woven fabrics were compared. The fabric selection was
done according to a pre-test and consequently similar fabrics were determined to be the subject of the
study. However, the more the number of the fabrics, the better the comparison and eventually the better the
assessment of simulation success. Therefore, it is prospected to test more fabrics with versatile fabric
properties for further studies.
Originality/value – Drape shape was observed from three perspectives: drape area, node numbers, and
node shapes. Dealing the problem from these perspectives provided an in-depth comparison of real and
virtual drapes. In this study, standard deviation of peak angles was used to explain node distribution that is
new to the literature to the authors’ knowledge.