Yazar "Karabork H." seçeneğine göre listele

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    Estimating crop cover fraction from digital color images
    (International Society for Photogrammetry and Remote Sensing, 2017) Karakus P.; Karabork H.
    The use of automated methods to estimate crop cover fraction from digital color images has increased in recent years. Crop cover fraction can determine accurate, fast and inexpensive with this methods. A digital color images was acquired over each of the 30 sample fields in 2014 year at 2-3 week intervals. Study area has 15 sunflower fields and 15 corn fields. Digital color images were collected during 4 months, namely over the course of the growing season from sowing until harvesting to determine crop cover fraction. We used two approach to estimate crop cover fraction. In first method, the images were transformed from the RGB (red, green, blue) color space to the HSI (hue, intensity, saturation) color space. We used an object-based image analysis approach to classify the images into green vegetation and the other materials. In the second method, The Green Crop Tracker is less labor and time intensive than the object-based classification approach, is a viable alternative to ground-based methods. By comparing object-based classification method and Green Crop Tracker software 2014 growing season, results were obtained: There were high correlations between the estimations obtained by object-based classification method and Green Crop Tracker software (for 2014 R2=0.89). The relationship between two methods for 2014-23 sunflower field was calculated R2=0.97. © Authors 2017.
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    Surveying and documentation of detailed historical heritage by laser scanning
    (International Society for Photogrammetry and Remote Sensing, 2007) Altuntas C.; Yildiz F.; Karabork H.; Yakar M.; Karasaka L.
    In this research, surveying and documentation of historical heritage has been aimed by using laser scanning. Developing technologies has brought out in surveying and documentation of historical heritage. Laser scanning which is the last technology in survey is proper in particularly detailed small objects. Traditional survey techniques have some limitation representation detailed object particularly elements characterized by plastic forms and complex geometrical forms. Laser scanner quickly measures with desired interval of concern object in form x,y,z coordinates. With obtaining point cloud, all decorative details of objects are visualization by enough accuracy and desired form with proper software. In this paper, Sidamara's grave in Archeological Museum of Konya, which have been detailed, has been measured and modeled. The surface models generated from point clouds have been visualization in color and gray scale mode. © 2007 International Society for Photogrammetry and Remote Sensing. All rights reserved.
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    The use of stereophotogrammetry in oral surgery: Measurement of area changes after secondary epithelization and grafting vestibuloplasties
    (2012) Ozturk A.; Dolanmaz D.; Celik S.; Isik K.; Karabork H.; Yildiz F.; Yakar M.
    Objective: Stereophotogrammetry (SPT) is a method in which three-dimensional coordinates are calculated from multiple two-dimensional projections. The purpose of this study was to compare the surface area changes between the secondary healing and grafting vestibuloplasty techniques in the mandible by using a stereophotogrammetric technique (SPT). Patients and Methods: Thirteen patients were included in this study: six patients were managed by using full-thickness skin or palatal mucosa grafts (two full-thickness palatal mucosal grafts and four full-thickness skin grafts); the remaining seven patients, who did not accept a second surgery for graft harvesting, underwent secondary epithelization vestibuloplasties. Postoperative changes of surgical areas were measured by using SPT. Statistical Analyses: The Wilcoxon (intragroup comparisons) and Mann-Whitney U (intergroup comparisons) tests were used for analysis of data. Results: In the grafting vestibuloplasty group, the surface area gain was statistically significant (P < 0.05). In the secondary epithelization vestibuloplasty group, there was no significant difference (P > 0.05), with even decrease of surface area being noted in some cases. Conclusion: SPT is a valid method for measurement of intraoral soft tissue changes.