Measurement of the visual perceptibility of sink marks in injection molded parts

Publikationen: Thesis / Studienabschlussarbeiten und HabilitationsschriftenMasterarbeit

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Measurement of the visual perceptibility of sink marks in injection molded parts. / Haba, Dietmar.
2011. 79 S.

Publikationen: Thesis / Studienabschlussarbeiten und HabilitationsschriftenMasterarbeit

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Haba, D. (2011). Measurement of the visual perceptibility of sink marks in injection molded parts. [Masterarbeit, Montanuniversität Leoben (000)].

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@mastersthesis{6b11943f244e476fb834d98d14c38d70,
title = "Measurement of the visual perceptibility of sink marks in injection molded parts",
abstract = "The aim of this work was to contribute to the improvement of a methodology for the evaluation of the visual perceptibility of sink marks on surfaces of injection molded parts by machine vision. Based on previous research work on the detection of surface defects a new methodology for the evaluation of the visibility of sink marks using digital images was developed. The methodology uses a surface model to approximate the intensity matrix of captured images. Calculated surface fit functions were used to determine the amplitudes of the second derivatives (ASD) for quantifying the perceptibility of the sink marks. Injection molding parts produced by using different predefined processing parameters were inspected and the influence of given parameters on the visual perceptibility of the sink marks was evaluated. ASD emerged to be an appropriate parameter for the application in a machine vision system. The results partly contradict findings of other authors.",
keywords = "sink mark, perceptibility, visibility, surface defect, injection molding, Einfallstelle, Sichtbarkeit, Wahrnehmbarkeit, Oberfl{\"a}chenfehler, Spritzguss",
author = "Dietmar Haba",
note = "embargoed until 27-05-2016",
year = "2011",
language = "English",
school = "Montanuniversitaet Leoben (000)",

}

RIS (suitable for import to EndNote) - Download

TY - THES

T1 - Measurement of the visual perceptibility of sink marks in injection molded parts

AU - Haba, Dietmar

N1 - embargoed until 27-05-2016

PY - 2011

Y1 - 2011

N2 - The aim of this work was to contribute to the improvement of a methodology for the evaluation of the visual perceptibility of sink marks on surfaces of injection molded parts by machine vision. Based on previous research work on the detection of surface defects a new methodology for the evaluation of the visibility of sink marks using digital images was developed. The methodology uses a surface model to approximate the intensity matrix of captured images. Calculated surface fit functions were used to determine the amplitudes of the second derivatives (ASD) for quantifying the perceptibility of the sink marks. Injection molding parts produced by using different predefined processing parameters were inspected and the influence of given parameters on the visual perceptibility of the sink marks was evaluated. ASD emerged to be an appropriate parameter for the application in a machine vision system. The results partly contradict findings of other authors.

AB - The aim of this work was to contribute to the improvement of a methodology for the evaluation of the visual perceptibility of sink marks on surfaces of injection molded parts by machine vision. Based on previous research work on the detection of surface defects a new methodology for the evaluation of the visibility of sink marks using digital images was developed. The methodology uses a surface model to approximate the intensity matrix of captured images. Calculated surface fit functions were used to determine the amplitudes of the second derivatives (ASD) for quantifying the perceptibility of the sink marks. Injection molding parts produced by using different predefined processing parameters were inspected and the influence of given parameters on the visual perceptibility of the sink marks was evaluated. ASD emerged to be an appropriate parameter for the application in a machine vision system. The results partly contradict findings of other authors.

KW - sink mark

KW - perceptibility

KW - visibility

KW - surface defect

KW - injection molding

KW - Einfallstelle

KW - Sichtbarkeit

KW - Wahrnehmbarkeit

KW - Oberflächenfehler

KW - Spritzguss

M3 - Master's Thesis

ER -