Plastic object detection with an infrared hyperspectral image

Download
2019
Diri, Mehmet Fatih
Undoubtedly, a world without plastic, which is the most important production material in almost every area, seems inconceivable today. The production and consumption chain, by which induced this versatile use, has caused plastic pollution that has devastating effects on the environment and natural ecosystems. In this thesis, which written with the motivation of contributing to the fight against plastic pollution and to be useful developing effective and sustainable policies, plastic pollution and pollutant types have been investigated; plastic objects have been examined in terms of physical, chemical and spectral aspects; and have been detected on land with an unsupervised manner through shortwave infrared hyperspectral image. 15.5-meter resolution 224 band hyperspectral image which was acquired by AVIRIS is used. In this study, 15 different study field, each of which includes significant plastic object samples like a greenhouse, an artificial turf football pitch, a solar panel, and a tent, is determined within the image scene. The positive value of spectral absorption around 1.72 µm, which is associated with the presence of plastic, has been mathematically expressed using two neighboring shoulders. This algorithm, which has the capability of detecting plastic objects on land quickly and precisely without needing any reference data and using only 3 shortwave infrared bands, has been named as Plastic Existence Index (PEI). The positive values generated as a result of the algorithm has been called Post Index Positive Value (PIPV). Since it was not possible to collect any data from the ground, the reference data has been produced by visual inspection method on the true color composite AVIRIS image. After implementation results have been compared with reference data, it is seen that highly-satisfactory outcomes have been obtained which mean value of UA is 90.51%, PA is 89.04% and OA is 97.37.

Suggestions

Multilayer graphene growth on polar dielectric substrates using chemical vapour deposition
KARAMAT, SHUMAİLA; Celik, K.; Zaman, S. Shah; Oral, Ahmet (Elsevier BV, 2018-06-01)
High quality of graphene is necessary for its applications at industrial scale production. The most convenient way is its direct growth on dielectrics which avoid the transfer route of graphene from metal to dielectric substrate usually followed by graphene community. The choice of a suitable dielectric for the gate material which can replace silicon dioxide (SiO2) is in high demand. Various properties like permittivity, thermodynamic stability, film morphology, interface quality, bandgap and band alignment...
Metataxonomics for the Micro-plastic and other Particle Attached Habitats in the Northeastern Mediterranean Sea
Küçükavşar, Selin; Gökdağ, Kerem; Kıdeyş, Ahmet Erkan; Karahan, Arzu (2018-07-20)
Plastic now pollutes every corner of earth and it is one of the major environmental problems of nowadays. Beside of being directly harmful as a mimic of food sources of marine organisms, as being suitable substrate for different kind of microbes they have also indirect damage. Metataxonomics analysis using Next Generation Sequencing (NGS) technology have revealed numerous previously unrecognized microorganisms. In the present study, micro-plastic attached bacterial community of samples taken fr...
Solvent extraction behaviour of scandium from lateritic nickel-cobalt ores using different organic reagents
Ferizoglu, Ece; Kaya, Serap; Topkaya, Yavuz Ali (2018-04-01)
Scandium is one of the most important and strategic metals that can be recovered as a by-product from lateritic nickel-cobalt ores. In this research, different extractants were investigated to extract scandium from sulphate medium by using solvent extraction method. Generally, the organic extractants are classified as acidic, neutral and basic reagents. Thus, the aim of the present study was to compare scandium extraction efficiencies of some acidic, neutral and basic organic reagents. For this reason, Ionq...
Solvent extraction of scandium from lateritic nickel- cobalt ores using different organic reagents
Ferizoglu, Ece; Kaya, Serap; Topkaya, Yavuz Ali (2016-09-28)
Scandium is the most important and strategic metal that can be recovered as a by-product from lateritic nickel-cobalt ores. In this research, different extractants were investigated in order to extract scandium from a sulfate medium by a using a solvent extraction method. Generally, the organic extractants are classified as acidic, neutral and basic organophosphorus compounds. However, in solvent extraction of scandium, the acidic and neutral organophosphorus compounds are preferred due to their higher extr...
THERMAL PERFORMANCE OF THREE DIFFERENT STRAWBALE BUILDINGS AT THE KERKENES ECO-CENTER
Elias Özkan, Soofia Tahira (College Publishing, 2013-01-01)
By and large, straw is not considered to be a building material, yet in comparison with traditional materials, building with straw bales is definitely more energy-efficient, eco-friendly, and low-cost; qualities that are desirable in sustainable buildings. This paper presents information on three different straw bales buildings at the Kerkenes Eco-Center, which is located in the village of Sahmuratli in central Anatolia, Turkey. The first of these was constructed with load-bearing straw bale walls; the seco...
Citation Formats
M. F. Diri, “Plastic object detection with an infrared hyperspectral image,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Geodetic and Geographical Information Technologies., Middle East Technical University, 2019.