04173nas|a2200493 i 4500 20260818134254.0 210700s1999 th uu m rtt 0| a1eng d .b11796595 AIT Thesis no.SR-99-08 Guo, Tao Image understanding for color maps Bangkok : Asian Institute of Technology, 1999 58 leaves Thesis ; no. SR-99-08 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development Thesis (M. Sc.) - Asian Institute of Technology, 1999 Nowadays, there is a growing need to conve11 new and existing paper documents into electronic documents for better archiving, retrieval and maintenance. In the field of GIS, as one of the most important methods of data input, image scanning can be faster, easier and more accurate, but the results are in the raster format which needs complicated raster - vector conversion and topological relationship reconstruction. This research applies the technologies of digital image processing, computer v1s1on, mathematical morphology etc to develop an image understanding software system for the analysis of color map images. A set of methods for extracting contour lines from color scanned map image has been presented in this thesis. The utilization of multiple information source and integration of various theories and methods are one of the main characters of this research. Color analysis, low-intermediate level visual algorithm, text - graphics separation and the development of object-orientated image analysis software etc. are also the topics of this thesis. Color Image Understanding system (named "CIU" by the author·) is developed to extract contour line from scanned color topographic map images. It is expected to be a useful PC software tool in the GIS application. In this research I propose methods for the analysis of color scanned map image. The main objective is to derive rcb11st and efficient methods that extract contour lines. The core of my methods consists of four components: color analysis, image analysis, contour line extraction, and vectorization. This Thesis consists of six chapters: introduction, literature review, methodology, color image understanding system, conclusions and recommendations, and references. Each of them is impo1tant and describes particular issues. Image processing Digital techniques Map-coloring problem Tokunaga, Mitsuharu, Chairperson Honda, Kiyoshi, Examination Committee Chen, Xiaoyong, Examination Committee Samarakoon, Lal, Examination Committee Surat Lertlum, Examination committee Asian Institute of Technology (Partial), Scholarship donor Asian Institute of Technology. Thesis ; no. SR-99-08 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B12376 .b11796595 mnait u 240330 0 000721 m a u 0 000:001:PDF:b1179659:002005:0:0:0:0:0:0 Abstract--AIT Thesis no.SR-99-8 n mnait mnait mnait mnarc 22 20 40 Barcode : 30050120694293 CREATED : 2014-02-05 RECORD # : i12795896 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120325799 CREATED : 2015-12-02 RECORD # : i12838755 LPATRON : 1025134 LCHKIN : 2017-03-28 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 1 TOT RENEW : 0 Barcode : 30050160023361 CREATED : 2016-01-04 RECORD # : i12919263 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121017908 CREATED : 2020-11-07 RECORD # : i13281598 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 57798 57798 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.SR-99-08 30050120694293 2026-08-18 13:42:54 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.SR-99-08 30050120325799 2026-08-18 13:42:54 4 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.SR-99-08 30050160023361 2026-08-18 13:42:54 1 2026-08-18 40 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no.SR-99-08 30050121017908 2026-08-18 13:42:54 1 2026-08-18 20