Retrieval of Petroglyph Images from a Database using Image Information
| dc.contributor.advisor | Davis, Wilbon | |
| dc.contributor.author | Huyser, Cynthia Gaye | |
| dc.date.accessioned | 2020-05-30T17:02:40Z | |
| dc.date.available | 2020-05-30T17:02:40Z | |
| dc.date.issued | 2002-12 | |
| dc.description.abstract | A method of retrieving petroglyph images from a database using image information is proposed. Image preprocessing prior to retrieval is discussed, and a method for automated threshold extraction is developed. Image retrieval using a line-histogram method developed by Huet and Hancock (1998, 1998) and a centroid-radii model based on the work of Tan, Ooi, and Thiang (2000) are investigated. The centroid-radii model, when modified to accommodate missing image information and used with normalized Euclidean distance measure, was effective in retrieving similar images from a field of 437 images when the distance between images was less than 30. Preprocessing and retrieval procedures were implemented in C code. The automated threshold extraction is O(n + m2), where n is the number of pixels in the bounding box of a selected region-of-interest and m is the number of grayscale intensities in which the image is encoded; extraction of the centroid-radii distance measure is O(n), where n is the maximum dimension of a side of the bounding box, and calculation of the distance between two images in the database is O(n2) in the number of radii used to describe an image. A user survey of perceived similarity between query images and resulting retrieval sets demonstrated a direct correlation between the average distance of the retrieved image to the query image and the number of images in the retrieval set perceived as similar to the query image. A cluster analysis performed using the distance measure showed that the most meaningful clustering of images occurs at small distances. | |
| dc.description.department | Computer Science | |
| dc.format | Text | |
| dc.format.extent | 436 pages | |
| dc.format.medium | 1 file (.pdf) | |
| dc.identifier.citation | Huyser, C. G. (2002). Retrieval of petroglyph images from a database using image information (Unpublished thesis). Southwest Texas State University, San Marcos, Texas. | |
| dc.identifier.uri | https://hdl.handle.net/10877/10479 | |
| dc.language.iso | en | |
| dc.subject | image processing | |
| dc.subject | photography | |
| dc.subject | computer vision | |
| dc.subject | petroglyphs | |
| dc.subject | digital techniques | |
| dc.title | Retrieval of Petroglyph Images from a Database using Image Information | |
| dc.type | Thesis | |
| thesis.degree.department | Computer Science | |
| thesis.degree.grantor | Southwest Texas State University | |
| thesis.degree.level | Masters | |
| thesis.degree.name | Master of Science |
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