Feature extraction of honeybee forewings and hindlegs using image processing and active contours

Gönülşen, Ayşegül
Honeybees have a rich genetic diversity in Anatolia. This is reflected in the presence of numerous subspecies of honeybee in Turkey. In METU, Department of Biology, honeybee populations of different regions in Turkey are investigated in order to characterize population variation in these regions. A total of 23 length and angle features belonging to the honeybee hindlegs and forewings are measured in these studies using a microscope and a monitor. These measurements are carried out by placing rulers on the monitor that shows the honeybee image and getting the length and angle features. However, performing measurements in this way is a time consuming process and is open to human-dependent errors. In this thesis, a 3semi-automated honeybee feature extraction system4 is presented. The aim is to increase the efficiency by decreasing the time spent on handling these measurements and by increasing the accuracy of measured hindleg and forewing features. The problem is studied from the acquisition of the microscope images, to the feature extraction of the honeybee features. In this scope, suitable methods are developed for segmentation of honeybee hindleg and forewing images. Within intermediate steps, blob analysis is utilized, and edges of the forewing and hindlegs are thinned using skeletonization. Templates that represent the forewing and hindleg edges are formed by either Bezier Curves or Polynomial Interpolation. In the feature extraction phase, Active Contour (Snake) algorithm is applied to the images in order to find the critical points using these templates.


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Akın Pekşen, Çiğdem; Bilgin, Cemal Can; Plötner, Jörg; Department of Biology (2015)
Water frogs (genus Pelophylax) in the eastern Mediterranean region represent a genetically and phylogenetically diverse group. Their dependence on freshwater habitats makes them highly sensitive to geological and climatic changes. Thus they are an ideal group to study the effect of past geological processes on molecular evolution of protein-coding and non-coding genes on the genome and on patterns of phylogeography in the eastern Mediterranean region. In the first study, the complete sequence of water frog ...
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Akkuş, Gizem; Gücü, Ali Cemal (2021-01-01)
This study evaluates the Black Sea anchovy population infected by parasitic Ascaridoid Nematode larva in the Southern Black Sea. It assesses the larva's effect on fish body condition, energy stored in the body, and anchovy growth. For this, anchovies sampled on July 10-31, 2018, from 30 different stations were examined, and 11.8% of the 825 anchovies were found infected. The observed infection rate was higher on the western side of the study area, suggesting that this rate may be used as a biomarker for the...
Adaptive traits of Turkish honeybee subspecies in response to climate A survey and a test of niche overlap
Kükrer, Mert; Bilgin, Cemal Can (null; 2016-09-01)
Genetic structure of black pine (Pinus nigra ARNOLD subspecies pallasiana) populations sampled from the Bolkar Mountains
Tolun, AA; Velioğlu, E; Çengel, Burcu N; Kaya, Zeki (2000-01-01)
In order to determine the magnitude and pattern of genetic diversity among Anatolian Black pine (Pinus nigra ARNOLD subspecies pallasiana) populations sampled in Bolkar Mountains and to recommend the potential populations which may be suitable for in situ conservation of genetic resources in this species, isoenzymes from 14 enzyme systems were investigated by starch gel electrophoresis. For this reason, open pollinated seed megagametophytes of half-sib families originated from the four populations (Camliyay...
First Genomic Insights into Pre-pottery Neolithic of Upper Mesopotamia
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Recent studies showed that Neolithic populations in southwest Asia included distinct gene pools in the Levant, in Central Anatolia, and in the Zagros. Further, genomic comparisons suggested that all three populations adopted sedentism and farming without major admixture or replacement from other regions. Meanwhile, the population genetic characteristics of the geographic midpoint of these regions, namely upper Mesopotamia, has not been investigated so far. Here in this study, we present the first genomic da...
Citation Formats
A. Gönülşen, “Feature extraction of honeybee forewings and hindlegs using image processing and active contours,” M.S. - Master of Science, Middle East Technical University, 2004.