title: Effects of manual threshold setting on image analysis results of a sandstone sample structural characterization by X-ray microtomography.
abstract: Binarization process plays an important role in structural characterization by means of micro-CT images analysis. The choice of the correct threshold to separate porous phase from the material is the procedure for binary images creation. Slight variations of the threshold level led to substantial variations in physical parameters determination. The aim of this work is to evaluate these variations based on manual threshold settings data of five operators. Porosity and pore size distribution of a sandstone sample were determined.
authors.affiliation: Laboratório de Meios Porosos e Propriedades Termofísicas (LMPT), PGMAT/EMC, Universidade Federal de Santa Catarina, Florianópolis-SC, Brazil. anderson@lmpt.ufsc.br
authors.forename: Anderson C
authors.initials: AC
authors.lastname: Moreira
authors.forename: Carlos R
authors.initials: CR
authors.lastname: Appoloni
authors.forename: Iara F
authors.initials: IF
authors.lastname: Mantovani
authors.forename: Jaquiel S
authors.initials: JS
authors.lastname: Fernandes
authors.forename: Leonardo C
authors.initials: LC
authors.lastname: Marques
authors.forename: Rodrigo
authors.initials: R
authors.lastname: Nagata
authors.forename: Celso P
authors.initials: CP
authors.lastname: Fernandes
mesh_terms: D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods*; D016062:Porosity; D011856:Radiographic Image Enhancement / Q000379:methods*; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D014056:Tomography, X-Ray / Q000379:methods*