PhotogrammetriaPub Date : 1989-06-01DOI: 10.1016/0031-8663(89)90002-1
J. Ton, A.K. Jain, W.R. Enslin, W.D. Hudson
{"title":"Automatic road identification and labeling in Landsat 4 TM images","authors":"J. Ton, A.K. Jain, W.R. Enslin, W.D. Hudson","doi":"10.1016/0031-8663(89)90002-1","DOIUrl":"10.1016/0031-8663(89)90002-1","url":null,"abstract":"<div><p>A conceptually parallel road detection method in Landsat 4 TM images is proposed. The goal is to detect roads at three different levels: major roads, local roads, and minor roads. This road network information is used for the evaluation of detected potential oil/gas pads, since these pads seldom occur on major roads but are often located at the end of minor access roads.</p><p>The proposed method is composed of two phases: low-level road detection and high-level road labeling. Experimental results from several images show that the proposed method can detect roads reasonably well in the low-level phase and is useful in pad evaluation. Future research includes combining multi-band information in road detection and determining thresholds in a more systematic way.</p></div>","PeriodicalId":101020,"journal":{"name":"Photogrammetria","volume":"43 5","pages":"Pages 257-276"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8663(89)90002-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84623757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PhotogrammetriaPub Date : 1989-06-01DOI: 10.1016/0031-8663(89)90001-X
F. Baret , G. Guyot , D.J. Major
{"title":"Crop biomass evaluation using radiometric measurements","authors":"F. Baret , G. Guyot , D.J. Major","doi":"10.1016/0031-8663(89)90001-X","DOIUrl":"10.1016/0031-8663(89)90001-X","url":null,"abstract":"<div><p>Crop biomass can be evaluated from radiometric measurements either by relating biomass to instantaneous measurements or by relating an integral of biomass to a radiometric value integrated over the corresponding portion of the growth period.</p><p>In this study, the success obtained by using these two methods is discussed. A simple radiative transfer model was used in conjunction with experimental results to demonstrate the universality of the relationship between the normalized difference vegetation index (<em>ND</em>) and leaf area index (<em>LAI</em>) or the photosynthetically active radiation (<em>PAR</em>) absorbed by the crop. It shows that the relationship between <em>ND</em> and absorbed <em>PAR</em> is less dependent on leaf orientation than the relationship between <em>ND</em> and <em>LAI</em>. A remaining problem is the sensitivity of those two relationships to soil optical properties. Nevertheless, temporal integration of radiometric data using the absorbed PAR concept appears to be a more promising approach than one-time measurements.</p></div>","PeriodicalId":101020,"journal":{"name":"Photogrammetria","volume":"43 5","pages":"Pages 241-256"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8663(89)90001-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81259543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PhotogrammetriaPub Date : 1989-03-01DOI: 10.1016/0031-8663(89)90012-4
Vassilis G. Mertzios , Giovanni L. Sicuranza , Anastasios N. Venetsanopoulos
{"title":"Efficient structures for two-dimensional quadratic filters","authors":"Vassilis G. Mertzios , Giovanni L. Sicuranza , Anastasios N. Venetsanopoulos","doi":"10.1016/0031-8663(89)90012-4","DOIUrl":"10.1016/0031-8663(89)90012-4","url":null,"abstract":"<div><p>Matrix decomposition techniques are used in order to obtain efficient structures for 2-D quadratic digital filters. The proposed structures consist of parallel branches which operate simultaneously on the input array. Each branch is formed by a 2-D FIR filter in cascade with a squaring operator, and all the partial results are summed up to obtain the output value. In the paper it is shown that, in particular, the lower-upper (LU) decomposition permits computational and hardware advantages.</p></div>","PeriodicalId":101020,"journal":{"name":"Photogrammetria","volume":"43 3","pages":"Pages 157-166"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8663(89)90012-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76057766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PhotogrammetriaPub Date : 1989-03-01DOI: 10.1016/0031-8663(89)90021-5
Ron Graham
{"title":"Seminar on small format (SF) aerial surveys and their applications","authors":"Ron Graham","doi":"10.1016/0031-8663(89)90021-5","DOIUrl":"https://doi.org/10.1016/0031-8663(89)90021-5","url":null,"abstract":"","PeriodicalId":101020,"journal":{"name":"Photogrammetria","volume":"43 3","pages":"Pages 222-228"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8663(89)90021-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91981654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PhotogrammetriaPub Date : 1989-03-01DOI: 10.1016/0031-8663(89)90009-4
Sandor A. Veress
{"title":"Different considerations in analytical X-ray photogrammetry","authors":"Sandor A. Veress","doi":"10.1016/0031-8663(89)90009-4","DOIUrl":"10.1016/0031-8663(89)90009-4","url":null,"abstract":"<div><p>The economy of X-ray photogrammetry systems is analyzed first as a geometrical economy where a maximum accuracy should be achieved with a minimum radiation through proper geometry. Experiments for the various geometry are discussed and illustrated. Second, the system is analyzed for data processing. Possible automation and computer programs are discussed. A desirable data flow is presented with proper hardware configuration.</p></div>","PeriodicalId":101020,"journal":{"name":"Photogrammetria","volume":"43 3","pages":"Pages 123-132"},"PeriodicalIF":0.0,"publicationDate":"1989-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0031-8663(89)90009-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88127036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}